fixed wrong deprecation warning
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / core / CompilationUnit.java
index 50c264c..c1d6b1b 100644 (file)
@@ -1,10 +1,10 @@
 /*******************************************************************************
  * Copyright (c) 2000, 2003 IBM Corporation and others.
- * All rights reserved. This program and the accompanying materials 
+ * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Common Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/cpl-v10.html
- * 
+ *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
@@ -12,12 +12,14 @@ package net.sourceforge.phpdt.internal.core;
 
 import java.util.ArrayList;
 import java.util.HashMap;
-import java.util.Iterator;
 import java.util.Map;
 
 import net.sourceforge.phpdt.core.IBuffer;
 import net.sourceforge.phpdt.core.IBufferFactory;
+import net.sourceforge.phpdt.core.ICodeAssist;
 import net.sourceforge.phpdt.core.ICompilationUnit;
+import net.sourceforge.phpdt.core.IImportContainer;
+import net.sourceforge.phpdt.core.IImportDeclaration;
 import net.sourceforge.phpdt.core.IJavaElement;
 import net.sourceforge.phpdt.core.IJavaModelStatusConstants;
 import net.sourceforge.phpdt.core.IJavaProject;
@@ -25,7 +27,6 @@ import net.sourceforge.phpdt.core.IMember;
 import net.sourceforge.phpdt.core.IMethod;
 import net.sourceforge.phpdt.core.IOpenable;
 import net.sourceforge.phpdt.core.IPackageDeclaration;
-import net.sourceforge.phpdt.core.IPackageFragment;
 import net.sourceforge.phpdt.core.IPackageFragmentRoot;
 import net.sourceforge.phpdt.core.IParent;
 import net.sourceforge.phpdt.core.IProblemRequestor;
@@ -36,12 +37,16 @@ import net.sourceforge.phpdt.core.IType;
 import net.sourceforge.phpdt.core.IWorkingCopy;
 import net.sourceforge.phpdt.core.JavaModelException;
 import net.sourceforge.phpdt.core.Signature;
+import net.sourceforge.phpdt.core.WorkingCopyOwner;
 import net.sourceforge.phpdt.core.compiler.CharOperation;
 import net.sourceforge.phpdt.core.jdom.IDOMNode;
 import net.sourceforge.phpdt.internal.compiler.IProblemFactory;
 import net.sourceforge.phpdt.internal.compiler.SourceElementParser;
+import net.sourceforge.phpdt.internal.compiler.ast.CompilationUnitDeclaration;
 import net.sourceforge.phpdt.internal.compiler.impl.CompilerOptions;
 import net.sourceforge.phpdt.internal.compiler.problem.DefaultProblemFactory;
+import net.sourceforge.phpdt.internal.core.util.MementoTokenizer;
+import net.sourceforge.phpdt.internal.core.util.Util;
 
 import org.eclipse.core.resources.IContainer;
 import org.eclipse.core.resources.IFile;
@@ -51,799 +56,1298 @@ import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.Path;
 
-/** 
+/**
  * @see ICompilationUnit
  */
 
-public class CompilationUnit extends Openable implements ICompilationUnit, net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit {
-       
-       public static boolean SHARED_WC_VERBOSE = false;
-       
-       // TODO: Remove when we are certain that every client is ready for this fix
-       public static final boolean FIX_BUG25184 = true;
+public class CompilationUnit extends Openable implements ICompilationUnit,
+       net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit {
+  public WorkingCopyOwner owner;
+  /**
+   * Constructs a handle to a compilation unit with the given name in the specified package for the specified owner
+   *
+   * @exception IllegalArgumentException
+   *              if the name of the compilation unit does not end with ".java"
+   */
+  protected CompilationUnit(PackageFragment parent, String name, WorkingCopyOwner owner) {
+       super(parent, name);
+       this.owner = owner;
+  }
 
-/**
- * Constructs a handle to a compilation unit with the given name in the
- * specified package.
- *
- * @exception IllegalArgumentException if the name of the compilation unit
- * does not end with ".java"
- */
-protected CompilationUnit(IPackageFragment parent, String name) {
-       super(COMPILATION_UNIT, parent, name);
-       if (!Util.isJavaFileName(name)) {
-               throw new IllegalArgumentException(net.sourceforge.phpdt.internal.core.Util.bind("convention.unit.notJavaName")); //$NON-NLS-1$
+  /**
+   * Accepts the given visitor onto the parsed tree of this compilation unit, after having runned the name resolution. The visitor's
+   * corresponding <code>visit</code> method is called with the corresponding parse tree. If the visitor returns <code>true</code>,
+   * this method visits this parse node's members.
+   *
+   * @param visitor
+   *          the visitor
+   * @exception JavaModelException
+   *              if this method fails. Reasons include:
+   *              <ul>
+   *              <li>This element does not exist.</li>
+   *              <li>The visitor failed with this exception.</li>
+   *              </ul>
+   */
+  //public void accept(IAbstractSyntaxTreeVisitor visitor) throws JavaModelException {
+  //   CompilationUnitVisitor.visit(this, visitor);
+  //}
+  /*
+   * @see ICompilationUnit#becomeWorkingCopy(IProblemRequestor, IProgressMonitor)
+   */
+  public void becomeWorkingCopy(IProblemRequestor problemRequestor, IProgressMonitor monitor) throws JavaModelException {
+       JavaModelManager manager = JavaModelManager.getJavaModelManager();
+       JavaModelManager.PerWorkingCopyInfo perWorkingCopyInfo = manager.getPerWorkingCopyInfo(this, false/* don't create */,
+               true /* record usage */, null/* no problem requestor needed */);
+       if (perWorkingCopyInfo == null) {
+         // close cu and its children
+         close();
+
+         BecomeWorkingCopyOperation operation = new BecomeWorkingCopyOperation(this, problemRequestor);
+         operation.runOperation(monitor);
        }
-}
-/**
- * Accepts the given visitor onto the parsed tree of this compilation unit, after
- * having runned the name resolution.
- * The visitor's corresponding <code>visit</code> method is called with the
- * corresponding parse tree. If the visitor returns <code>true</code>, this method
- * visits this parse node's members.
- *
- * @param visitor the visitor
- * @exception JavaModelException if this method fails. Reasons include:
- * <ul>
- * <li> This element does not exist.</li>
- * <li> The visitor failed with this exception.</li>
- * </ul>
- */
-//public void accept(IAbstractSyntaxTreeVisitor visitor) throws JavaModelException {
-//     CompilationUnitVisitor.visit(this, visitor);
-//} 
+  }
 
-protected void buildStructure(OpenableElementInfo info, IProgressMonitor monitor) throws JavaModelException {
+  //protected void buildStructure(OpenableElementInfo info, IProgressMonitor monitor) throws JavaModelException {
+  //
+  //   if (monitor != null && monitor.isCanceled()) return;
+  //
+  //   // remove existing (old) infos
+  //   removeInfo();
+  //
+  //   HashMap newElements = new HashMap(11);
+  //   info.setIsStructureKnown(generateInfos(info, monitor, newElements, getResource()));
+  //   JavaModelManager.getJavaModelManager().getElementsOutOfSynchWithBuffers().remove(this);
+  //   for (Iterator iter = newElements.keySet().iterator(); iter.hasNext();) {
+  //           IJavaElement key = (IJavaElement) iter.next();
+  //           Object value = newElements.get(key);
+  //           JavaModelManager.getJavaModelManager().putInfo(key, value);
+  //   }
+  //   // add the info for this at the end, to ensure that a getInfo cannot reply null in case the LRU cache needs
+  //   // to be flushed. Might lead to performance issues.
+  //   // see PR 1G2K5S7: ITPJCORE:ALL - NPE when accessing source for a binary type
+  //   JavaModelManager.getJavaModelManager().putInfo(this, info);
+  //}
+  protected boolean buildStructure(OpenableElementInfo info, final IProgressMonitor pm, Map newElements,
+         IResource underlyingResource) throws JavaModelException {
+
+       // check if this compilation unit can be opened
+       if (!isWorkingCopy()) { // no check is done on root kind or exclusion pattern for working copies
+         if ( // ((IPackageFragment)getParent()).getKind() == IPackageFragmentRoot.K_BINARY||
+         !isValidCompilationUnit() || !underlyingResource.isAccessible()) {
+               throw newNotPresentException();
+         }
+       }
 
-       if (monitor != null && monitor.isCanceled()) return;
+       // prevents reopening of non-primary working copies (they are closed when they are discarded and should not be reopened)
+       if (!isPrimary() && getPerWorkingCopyInfo() == null) {
+         throw newNotPresentException();
+       }
 
-       // remove existing (old) infos
-       removeInfo();
+       CompilationUnitElementInfo unitInfo = (CompilationUnitElementInfo) info;
 
-       HashMap newElements = new HashMap(11);
-       info.setIsStructureKnown(generateInfos(info, monitor, newElements, getResource()));
-       JavaModelManager.getJavaModelManager().getElementsOutOfSynchWithBuffers().remove(this);
-       for (Iterator iter = newElements.keySet().iterator(); iter.hasNext();) {
-               IJavaElement key = (IJavaElement) iter.next();
-               Object value = newElements.get(key);
-               JavaModelManager.getJavaModelManager().putInfo(key, value);
+       // get buffer contents
+       IBuffer buffer = getBufferManager().getBuffer(CompilationUnit.this);
+       if (buffer == null) {
+         buffer = openBuffer(pm, unitInfo); // open buffer independently from the info, since we are building the info
        }
-       // add the info for this at the end, to ensure that a getInfo cannot reply null in case the LRU cache needs
-       // to be flushed. Might lead to performance issues.
-       // see PR 1G2K5S7: ITPJCORE:ALL - NPE when accessing source for a binary type
-       JavaModelManager.getJavaModelManager().putInfo(this, info);     
-}
-
-///**
-// * @see ICodeAssist#codeComplete(int, ICompletionRequestor)
-// */
-//public void codeComplete(int offset, ICompletionRequestor requestor) throws JavaModelException {
-//     codeComplete(this, isWorkingCopy() ? (org.eclipse.jdt.internal.compiler.env.ICompilationUnit) getOriginalElement() : this, offset, requestor);
-//}
-/**
- * @see ICodeAssist#codeSelect(int, int)
- */
-//public IJavaElement[] codeSelect(int offset, int length) throws JavaModelException {
-//     return super.codeSelect(this, offset, length);
-//}
-/**
- * @see IWorkingCopy#commit(boolean, IProgressMonitor)
- */
-public void commit(boolean force, IProgressMonitor monitor) throws JavaModelException {
-       throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_ELEMENT_TYPES, this));
-}
-/**
- * @see ISourceManipulation#copy(IJavaElement, IJavaElement, String, boolean, IProgressMonitor)
- */
-public void copy(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor) throws JavaModelException {
+       final char[] contents = buffer == null ? null : buffer.getCharacters();
+
+       // generate structure and compute syntax problems if needed
+       CompilationUnitStructureRequestor requestor = new CompilationUnitStructureRequestor(this, unitInfo, newElements);
+       JavaModelManager.PerWorkingCopyInfo perWorkingCopyInfo = getPerWorkingCopyInfo();
+       IJavaProject project = getJavaProject();
+       boolean computeProblems = JavaProject.hasJavaNature(project.getProject()) && perWorkingCopyInfo != null
+               && perWorkingCopyInfo.isActive();
+       IProblemFactory problemFactory = new DefaultProblemFactory();
+       Map options = project.getOptions(true);
+
+       if (underlyingResource == null) {
+         underlyingResource = getResource();
+       }
+
+       SourceElementParser parser = new SourceElementParser(requestor, problemFactory,
+               new CompilerOptions(options));
+       //, true/*report local declarations*/);
+       requestor.parser = parser;
+       CompilationUnitDeclaration unit = parser.parseCompilationUnit(
+               new net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit() {
+                 public char[] getContents() {
+                       return contents;
+                 }
+
+                 public char[] getMainTypeName() {
+                       return CompilationUnit.this.getMainTypeName();
+                 }
+
+                 public char[][] getPackageName() {
+                       return CompilationUnit.this.getPackageName();
+                 }
+
+                 public char[] getFileName() {
+                       return CompilationUnit.this.getFileName();
+                 }
+
+                 public IResource getResource() {
+                       return CompilationUnit.this.getResource();
+                 }
+               }, true /* full parse to find local elements */);
+
+       // update timestamp (might be IResource.NULL_STAMP if original does not exist)
+
+       unitInfo.timestamp = ((IFile) underlyingResource).getModificationStamp();
+       // compute other problems if needed
+       CompilationUnitDeclaration compilationUnitDeclaration = null;
+       try {
+         if (computeProblems) {
+               perWorkingCopyInfo.beginReporting();
+               compilationUnitDeclaration = CompilationUnitProblemFinder.process(unit, this, contents, parser, this.owner,
+                       perWorkingCopyInfo, problemFactory, false/* don't cleanup cu */, pm);
+               perWorkingCopyInfo.endReporting();
+         }
+
+         //            if (info instanceof ASTHolderCUInfo) {
+         //                    int astLevel = ((ASTHolderCUInfo) info).astLevel;
+         //                    net.sourceforge.phpdt.core.dom.CompilationUnit cu = AST.convertCompilationUnit(astLevel, unit, contents, options, pm);
+         //                    ((ASTHolderCUInfo) info).ast = cu;
+         //            }
+       } finally {
+         if (compilationUnitDeclaration != null) {
+               compilationUnitDeclaration.cleanUp();
+         }
+       }
+
+       return unitInfo.isStructureKnown();
+  }
+
+  ///**
+  // * @see ICodeAssist#codeComplete(int, ICompletionRequestor)
+  // */
+  //public void codeComplete(int offset, ICompletionRequestor requestor) throws JavaModelException {
+  //   codeComplete(this, isWorkingCopy() ? (net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit) getOriginalElement() : this,
+  // offset, requestor);
+  //}
+  /**
+   * @see ICodeAssist#codeSelect(int, int)
+   */
+  //public IJavaElement[] codeSelect(int offset, int length) throws JavaModelException {
+  //   return super.codeSelect(this, offset, length);
+  //}
+  /**
+   * @see IWorkingCopy#commit(boolean, IProgressMonitor)
+   */
+  public void commit(boolean force, IProgressMonitor monitor) throws JavaModelException {
+       commitWorkingCopy(force, monitor);
+       //      throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_ELEMENT_TYPES, this));
+  }
+
+  /**
+   * @see ICompilationUnit#commitWorkingCopy(boolean, IProgressMonitor)
+   */
+  public void commitWorkingCopy(boolean force, IProgressMonitor monitor) throws JavaModelException {
+       CommitWorkingCopyOperation op = new CommitWorkingCopyOperation(this, force);
+       op.runOperation(monitor);
+  }
+
+  /**
+   * @see ISourceManipulation#copy(IJavaElement, IJavaElement, String, boolean, IProgressMonitor)
+   */
+  public void copy(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor)
+         throws JavaModelException {
        if (container == null) {
-               throw new IllegalArgumentException(Util.bind("operation.nullContainer")); //$NON-NLS-1$
+         throw new IllegalArgumentException(Util.bind("operation.nullContainer")); //$NON-NLS-1$
        }
-       IJavaElement[] elements = new IJavaElement[] {this};
-       IJavaElement[] containers = new IJavaElement[] {container};
+       IJavaElement[] elements = new IJavaElement[] { this };
+       IJavaElement[] containers = new IJavaElement[] { container };
        String[] renamings = null;
        if (rename != null) {
-               renamings = new String[] {rename};
+         renamings = new String[] { rename };
        }
        getJavaModel().copy(elements, containers, null, renamings, force, monitor);
-}
-/**
- * Returns a new element info for this element.
- */
-protected OpenableElementInfo createElementInfo() {
+  }
+
+  /**
+   * Returns a new element info for this element.
+   */
+  protected Object createElementInfo() {
        return new CompilationUnitElementInfo();
-}
-///**
-// * @see ICompilationUnit#createImport(String, IJavaElement, IProgressMonitor)
-// */
-//public IImportDeclaration createImport(String name, IJavaElement sibling, IProgressMonitor monitor) throws JavaModelException {
-//     CreateImportOperation op = new CreateImportOperation(name, this);
-//     if (sibling != null) {
-//             op.createBefore(sibling);
-//     }
-//     runOperation(op, monitor);
-//     return getImport(name);
-//}
-/**
- * @see ICompilationUnit#createPackageDeclaration(String, IProgressMonitor)
- */
-public IPackageDeclaration createPackageDeclaration(String name, IProgressMonitor monitor) throws JavaModelException {
-       
-       CreatePackageDeclarationOperation op= new CreatePackageDeclarationOperation(name, this);
+  }
+
+  ///**
+  // * @see ICompilationUnit#createImport(String, IJavaElement, IProgressMonitor)
+  // */
+  //public IImportDeclaration createImport(String name, IJavaElement sibling, IProgressMonitor monitor) throws JavaModelException {
+  //   CreateImportOperation op = new CreateImportOperation(name, this);
+  //   if (sibling != null) {
+  //           op.createBefore(sibling);
+  //   }
+  //   runOperation(op, monitor);
+  //   return getImport(name);
+  //}
+  /**
+   * @see ICompilationUnit#createPackageDeclaration(String, IProgressMonitor)
+   */
+  public IPackageDeclaration createPackageDeclaration(String name, IProgressMonitor monitor) throws JavaModelException {
+
+       CreatePackageDeclarationOperation op = new CreatePackageDeclarationOperation(name, this);
        runOperation(op, monitor);
        return getPackageDeclaration(name);
-}
-///**
-// * @see ICompilationUnit#createType(String, IJavaElement, boolean, IProgressMonitor)
-// */
-//public IType createType(String content, IJavaElement sibling, boolean force, IProgressMonitor monitor) throws JavaModelException {
-//     if (!exists()) {
-//             //autogenerate this compilation unit
-//             IPackageFragment pkg = (IPackageFragment) getParent();
-//             String source = ""; //$NON-NLS-1$
-//             if (pkg.getElementName().length() > 0) {
-//                     //not the default package...add the package declaration
-//                     source = "package " + pkg.getElementName() + ";"  + org.eclipse.jdt.internal.compiler.util.Util.LINE_SEPARATOR + org.eclipse.jdt.internal.compiler.util.Util.LINE_SEPARATOR; //$NON-NLS-1$ //$NON-NLS-2$
-//             }
-//             CreateCompilationUnitOperation op = new CreateCompilationUnitOperation(pkg, fName, source, force);
-//             runOperation(op, monitor);
-//     }
-//     CreateTypeOperation op = new CreateTypeOperation(this, content, force);
-//     if (sibling != null) {
-//             op.createBefore(sibling);
-//     }
-//     runOperation(op, monitor);
-//     return (IType) op.getResultElements()[0];
-//}
-/**
- * @see ISourceManipulation#delete(boolean, IProgressMonitor)
- */
-public void delete(boolean force, IProgressMonitor monitor) throws JavaModelException {
-       IJavaElement[] elements= new IJavaElement[] {this};
+  }
+
+  ///**
+  // * @see ICompilationUnit#createType(String, IJavaElement, boolean, IProgressMonitor)
+  // */
+  //public IType createType(String content, IJavaElement sibling, boolean force, IProgressMonitor monitor) throws
+  // JavaModelException {
+  //   if (!exists()) {
+  //           //autogenerate this compilation unit
+  //           IPackageFragment pkg = (IPackageFragment) getParent();
+  //           String source = ""; //$NON-NLS-1$
+  //           if (pkg.getElementName().length() > 0) {
+  //                   //not the default package...add the package declaration
+  //                   source = "package " + pkg.getElementName() + ";" + net.sourceforge.phpdt.internal.compiler.util.ProjectPrefUtil.LINE_SEPARATOR +
+  // net.sourceforge.phpdt.internal.compiler.util.ProjectPrefUtil.LINE_SEPARATOR; //$NON-NLS-1$ //$NON-NLS-2$
+  //           }
+  //           CreateCompilationUnitOperation op = new CreateCompilationUnitOperation(pkg, fName, source, force);
+  //           runOperation(op, monitor);
+  //   }
+  //   CreateTypeOperation op = new CreateTypeOperation(this, content, force);
+  //   if (sibling != null) {
+  //           op.createBefore(sibling);
+  //   }
+  //   runOperation(op, monitor);
+  //   return (IType) op.getResultElements()[0];
+  //}
+  /**
+   * @see ISourceManipulation#delete(boolean, IProgressMonitor)
+   */
+  public void delete(boolean force, IProgressMonitor monitor) throws JavaModelException {
+       IJavaElement[] elements = new IJavaElement[] { this };
        getJavaModel().delete(elements, force, monitor);
-}
-/**
- * This is not a working copy, do nothing.
- *
- * @see IWorkingCopy#destroy()
- */
-public void destroy() {
-}
+  }
 
+  /**
+   * @see IWorkingCopy#destroy()
+   * @deprecated
+   */
+  public void destroy() {
+       try {
+         discardWorkingCopy();
+       } catch (JavaModelException e) {
+         e.printStackTrace();
+       }
+  }
 
-/**
- * Returns true if this handle represents the same Java element
- * as the given handle.
- *
- * <p>Compilation units must also check working copy state;
- *
- * @see Object#equals(java.lang.Object)
- */
-public boolean equals(Object o) {
-       return super.equals(o) && !((ICompilationUnit)o).isWorkingCopy();
-}
-/**
- * @see JavaElement#equalsDOMNode(IDOMNode)
- */
-protected boolean equalsDOMNode(IDOMNode node) throws JavaModelException {
+  /*
+   * @see ICompilationUnit#discardWorkingCopy
+   */
+  public void discardWorkingCopy() throws JavaModelException {
+       // discard working copy and its children
+       DiscardWorkingCopyOperation op = new DiscardWorkingCopyOperation(this);
+       op.runOperation(null);
+  }
+
+  /**
+   * Returns true if this handle represents the same Java element as the given handle.
+   *
+   * @see Object#equals(java.lang.Object)
+   */
+  public boolean equals(Object obj) {
+       if (!(obj instanceof CompilationUnit))
+         return false;
+       CompilationUnit other = (CompilationUnit) obj;
+       return this.owner.equals(other.owner) && super.equals(obj);
+  }
+
+  /**
+   * @see JavaElement#equalsDOMNode(IDOMNode)
+   */
+  protected boolean equalsDOMNode(IDOMNode node) throws JavaModelException {
        String name = getElementName();
-       if (node.getNodeType() == IDOMNode.COMPILATION_UNIT && name != null ) {
-               String nodeName = node.getName();
-               if (nodeName == null) return false;             
-               if (name.equals(nodeName)) {
+       if (node.getNodeType() == IDOMNode.COMPILATION_UNIT && name != null) {
+         String nodeName = node.getName();
+         if (nodeName == null)
+               return false;
+         if (name.equals(nodeName)) {
+               return true;
+         } else {
+               // iterate through all the types inside the receiver and see if one of them can fit
+               IType[] types = getTypes();
+               String typeNodeName = nodeName.substring(0, nodeName.indexOf(".java")); //$NON-NLS-1$
+               for (int i = 0, max = types.length; i < max; i++) {
+                 if (types[i].getElementName().equals(typeNodeName)) {
                        return true;
-               } else {
-                       // iterate through all the types inside the receiver and see if one of them can fit
-                       IType[] types = getTypes();
-                       String typeNodeName = nodeName.substring(0, nodeName.indexOf(".java")); //$NON-NLS-1$
-                       for (int i = 0, max = types.length; i < max; i++) {
-                               if (types[i].getElementName().equals(typeNodeName)) {
-                                       return true;
-                               }
-                       }
+                 }
                }
+         }
        }
        return false;
-}
-/**
- * @see IWorkingCopy#findElements(IJavaElement)
- */
-public IJavaElement[] findElements(IJavaElement element) {
+  }
+
+  /**
+   * @see IWorkingCopy#findElements(IJavaElement)
+   */
+  public IJavaElement[] findElements(IJavaElement element) {
        ArrayList children = new ArrayList();
        while (element != null && element.getElementType() != IJavaElement.COMPILATION_UNIT) {
-               children.add(element);
-               element = element.getParent();
+         children.add(element);
+         element = element.getParent();
        }
-       if (element == null) return null;
+       if (element == null)
+         return null;
        IJavaElement currentElement = this;
-       for (int i = children.size()-1; i >= 0; i--) {
-               IJavaElement child = (IJavaElement)children.get(i);
-               switch (child.getElementType()) {
-//                     case IJavaElement.PACKAGE_DECLARATION:
-//                             currentElement = ((ICompilationUnit)currentElement).getPackageDeclaration(child.getElementName());
-//                             break;
-//                     case IJavaElement.IMPORT_CONTAINER:
-//                             currentElement = ((ICompilationUnit)currentElement).getImportContainer();
-//                             break;
-//                     case IJavaElement.IMPORT_DECLARATION:
-//                             currentElement = ((IImportContainer)currentElement).getImport(child.getElementName());
-//                             break;
-                       case IJavaElement.TYPE:
-                               if (currentElement.getElementType() == IJavaElement.COMPILATION_UNIT) {
-                                       currentElement = ((ICompilationUnit)currentElement).getType(child.getElementName());
-                               } else {
-                                       currentElement = ((IType)currentElement).getType(child.getElementName());
-                               }
-                               break;
-//                     case IJavaElement.INITIALIZER:
-//                             currentElement = ((IType)currentElement).getInitializer(((JavaElement)child).getOccurrenceCount());
-//                             break;
-                       case IJavaElement.FIELD:
-                               currentElement = ((IType)currentElement).getField(child.getElementName());
-                               break;
-                       case IJavaElement.METHOD:
-                               return ((IType)currentElement).findMethods((IMethod)child);
+       for (int i = children.size() - 1; i >= 0; i--) {
+         IJavaElement child = (IJavaElement) children.get(i);
+         switch (child.getElementType()) {
+         //                    case IJavaElement.PACKAGE_DECLARATION:
+         //                            currentElement = ((ICompilationUnit)currentElement).getPackageDeclaration(child.getElementName());
+         //                            break;
+         //                    case IJavaElement.IMPORT_CONTAINER:
+         //                            currentElement = ((ICompilationUnit)currentElement).getImportContainer();
+         //                            break;
+         //                    case IJavaElement.IMPORT_DECLARATION:
+         //                            currentElement = ((IImportContainer)currentElement).getImport(child.getElementName());
+         //                            break;
+         case IJavaElement.TYPE:
+               if (currentElement.getElementType() == IJavaElement.COMPILATION_UNIT) {
+                 currentElement = ((ICompilationUnit) currentElement).getType(child.getElementName());
+               } else {
+                 currentElement = ((IType) currentElement).getType(child.getElementName());
                }
-               
+               break;
+         //                    case IJavaElement.INITIALIZER:
+         //                            currentElement = ((IType)currentElement).getInitializer(((JavaElement)child).getOccurrenceCount());
+         //                            break;
+         case IJavaElement.FIELD:
+               currentElement = ((IType) currentElement).getField(child.getElementName());
+               break;
+         case IJavaElement.METHOD:
+               return ((IType) currentElement).findMethods((IMethod) child);
+         }
+
        }
        if (currentElement != null && currentElement.exists()) {
-               return new IJavaElement[] {currentElement};
+         return new IJavaElement[] { currentElement };
        } else {
-               return null;
+         return null;
        }
-}
-/**
- * @see IWorkingCopy#findPrimaryType()
- */
-public IType findPrimaryType() {
+  }
+
+  /**
+   * @see IWorkingCopy#findPrimaryType()
+   */
+  public IType findPrimaryType() {
        String typeName = Signature.getQualifier(this.getElementName());
-       IType primaryType= this.getType(typeName);
+       IType primaryType = this.getType(typeName);
        if (primaryType.exists()) {
-               return primaryType;
+         return primaryType;
        }
        return null;
-}
+  }
 
-/**
- * @see IWorkingCopy#findSharedWorkingCopy(IBufferFactory)
- */
-public IJavaElement findSharedWorkingCopy(IBufferFactory factory) {
+  /**
+   * @see IWorkingCopy#findSharedWorkingCopy(IBufferFactory)
+   * @deprecated
+   */
+  public IJavaElement findSharedWorkingCopy(IBufferFactory factory) {
 
        // if factory is null, default factory must be used
-       if (factory == null) factory = this.getBufferManager().getDefaultBufferFactory();
-
-       // In order to be shared, working copies have to denote the same compilation unit 
-       // AND use the same buffer factory.
-       // Assuming there is a little set of buffer factories, then use a 2 level Map cache.
-       Map sharedWorkingCopies = JavaModelManager.getJavaModelManager().sharedWorkingCopies;
-       
-       Map perFactoryWorkingCopies = (Map) sharedWorkingCopies.get(factory);
-       if (perFactoryWorkingCopies == null) return null;
-       return (WorkingCopy)perFactoryWorkingCopies.get(this);
-}
-
-protected boolean generateInfos(OpenableElementInfo info, IProgressMonitor pm, Map newElements, IResource underlyingResource) throws JavaModelException {
-
-//     if (getParent() instanceof JarPackageFragment) {
-//             // ignore .java files in jar
-//             throw newNotPresentException();
-//     } else {
-               // put the info now, because getting the contents requires it
-               JavaModelManager.getJavaModelManager().putInfo(this, info);
-               CompilationUnitElementInfo unitInfo = (CompilationUnitElementInfo) info;
-
-               // generate structure
-               CompilationUnitStructureRequestor requestor = new CompilationUnitStructureRequestor(this, unitInfo, newElements);
-               IProblemFactory factory = new DefaultProblemFactory();
-               SourceElementParser parser = new SourceElementParser(requestor, factory, new CompilerOptions(getJavaProject().getOptions(true)));
-//       SourceElementParser parser = new SourceElementParser(requestor, factory);
-               requestor.parser = parser;
-               parser.parseCompilationUnit(this, false);
-               if (isWorkingCopy()) {
-                       CompilationUnit original = (CompilationUnit) getOriginalElement();
-                       // might be IResource.NULL_STAMP if original does not exist
-                       unitInfo.fTimestamp = ((IFile) original.getResource()).getModificationStamp();
-               }
-               return unitInfo.isStructureKnown();
-//     }
-}
-/**
- * @see ICompilationUnit#getAllTypes()
- */
-public IType[] getAllTypes() throws JavaModelException {
+       if (factory == null)
+         factory = this.getBufferManager().getDefaultBufferFactory();
+
+       return findWorkingCopy(BufferFactoryWrapper.create(factory));
+  }
+
+  /**
+   * @see ICompilationUnit#findWorkingCopy(WorkingCopyOwner)
+   */
+  public ICompilationUnit findWorkingCopy(WorkingCopyOwner workingCopyOwner) {
+       CompilationUnit cu = new CompilationUnit((PackageFragment) this.parent, getElementName(), workingCopyOwner);
+       if (workingCopyOwner == DefaultWorkingCopyOwner.PRIMARY) {
+         return cu;
+       } else {
+         // must be a working copy
+         JavaModelManager.PerWorkingCopyInfo perWorkingCopyInfo = cu.getPerWorkingCopyInfo();
+         if (perWorkingCopyInfo != null) {
+               return perWorkingCopyInfo.getWorkingCopy();
+         } else {
+               return null;
+         }
+       }
+  }
+
+  //protected boolean generateInfos(OpenableElementInfo info, IProgressMonitor pm, Map newElements, IResource underlyingResource)
+  // throws JavaModelException {
+  //
+  //// if (getParent() instanceof JarPackageFragment) {
+  //// // ignore .java files in jar
+  //// throw newNotPresentException();
+  //// } else {
+  //           // put the info now, because getting the contents requires it
+  //           JavaModelManager.getJavaModelManager().putInfo(this, info);
+  //           CompilationUnitElementInfo unitInfo = (CompilationUnitElementInfo) info;
+  //
+  //           // generate structure
+  //           CompilationUnitStructureRequestor requestor = new CompilationUnitStructureRequestor(this, unitInfo, newElements);
+  //           IProblemFactory factory = new DefaultProblemFactory();
+  //           SourceElementParser parser = new SourceElementParser(requestor, factory, new
+  // CompilerOptions(getJavaProject().getOptions(true)));
+  //// SourceElementParser parser = new SourceElementParser(requestor, factory);
+  //           requestor.parser = parser;
+  //           parser.parseCompilationUnit(this, false);
+  //           if (isWorkingCopy()) {
+  //                   CompilationUnit original = (CompilationUnit) getOriginalElement();
+  //                   // might be IResource.NULL_STAMP if original does not exist
+  //                   unitInfo.timestamp = ((IFile) original.getResource()).getModificationStamp();
+  //           }
+  //           return unitInfo.isStructureKnown();
+  //// }
+  //}
+  /**
+   * @see ICompilationUnit#getAllTypes()
+   */
+  public IType[] getAllTypes() throws JavaModelException {
        IJavaElement[] types = getTypes();
        int i;
        ArrayList allTypes = new ArrayList(types.length);
        ArrayList typesToTraverse = new ArrayList(types.length);
        for (i = 0; i < types.length; i++) {
-               typesToTraverse.add(types[i]);
+         typesToTraverse.add(types[i]);
        }
        while (!typesToTraverse.isEmpty()) {
-               IType type = (IType) typesToTraverse.get(0);
-               typesToTraverse.remove(type);
-               allTypes.add(type);
-               types = type.getTypes();
-               for (i = 0; i < types.length; i++) {
-                       typesToTraverse.add(types[i]);
-               }
-       } 
+         IType type = (IType) typesToTraverse.get(0);
+         typesToTraverse.remove(type);
+         allTypes.add(type);
+         types = type.getTypes();
+         for (i = 0; i < types.length; i++) {
+               typesToTraverse.add(types[i]);
+         }
+       }
        IType[] arrayOfAllTypes = new IType[allTypes.size()];
        allTypes.toArray(arrayOfAllTypes);
        return arrayOfAllTypes;
-}
-/**
- * @see IMember#getCompilationUnit()
- */
-public ICompilationUnit getCompilationUnit() {
+  }
+
+  /**
+   * @see IMember#getCompilationUnit()
+   */
+  public ICompilationUnit getCompilationUnit() {
        return this;
-}
-/**
- * @see org.eclipse.jdt.internal.compiler.env.ICompilationUnit#getContents()
- */
-public char[] getContents() {
+  }
+
+  /**
+   * @see net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit#getContents()
+   */
+  public char[] getContents() {
        try {
-               IBuffer buffer = this.getBuffer();
-               return buffer == null ? null : buffer.getCharacters();
+         IBuffer buffer = this.getBuffer();
+         return buffer == null ? null : buffer.getCharacters();
        } catch (JavaModelException e) {
-               return CharOperation.NO_CHAR;
+         return CharOperation.NO_CHAR;
        }
-}
-/**
- * A compilation unit has a corresponding resource unless it is contained
- * in a jar.
- *
- * @see IJavaElement#getCorrespondingResource()
- */
-public IResource getCorrespondingResource() throws JavaModelException {
-       IPackageFragmentRoot root= (IPackageFragmentRoot)getParent().getParent();
+  }
+
+  /**
+   * A compilation unit has a corresponding resource unless it is contained in a jar.
+   *
+   * @see IJavaElement#getCorrespondingResource()
+   */
+  public IResource getCorrespondingResource() throws JavaModelException {
+       IPackageFragmentRoot root = (IPackageFragmentRoot) getParent().getParent();
        if (root.isArchive()) {
-               return null;
+         return null;
        } else {
-               return getUnderlyingResource();
+         return getUnderlyingResource();
        }
-}
-/**
- * @see ICompilationUnit#getElementAt(int)
- */
-public IJavaElement getElementAt(int position) throws JavaModelException {
+  }
 
-       IJavaElement e= getSourceElementAt(position);
+  /**
+   * @see ICompilationUnit#getElementAt(int)
+   */
+  public IJavaElement getElementAt(int position) throws JavaModelException {
+
+       IJavaElement e = getSourceElementAt(position);
        if (e == this) {
-               return null;
+         return null;
        } else {
-               return e;
+         return e;
        }
-}
-public char[] getFileName(){
+  }
+
+  /**
+   * @see IJavaElement
+   */
+  public int getElementType() {
+       return COMPILATION_UNIT;
+  }
+
+  public char[] getFileName() {
        return getElementName().toCharArray();
-}
-/**
- * @see JavaElement#getHandleMementoDelimiter()
- */
-protected char getHandleMementoDelimiter() {
-       return JavaElement.JEM_COMPILATIONUNIT;
-}
-/**
- * @see ICompilationUnit#getImport(String)
- */
-//public IImportDeclaration getImport(String name) {
-//     return new ImportDeclaration(getImportContainer(), name);
-//}
-///**
-// * @see ICompilationUnit#getImportContainer()
-// */
-//public IImportContainer getImportContainer() {
-//     return new ImportContainer(this);
-//}
+  }
+  /*
+   * @see JavaElement
+   */
+  public IJavaElement getHandleFromMemento(String token, MementoTokenizer memento, WorkingCopyOwner workingCopyOwner) {
+       switch (token.charAt(0)) {
+               case JEM_COUNT:
+                       return getHandleUpdatingCountFromMemento(memento, workingCopyOwner);
+               case JEM_IMPORTDECLARATION:
+                       JavaElement container = (JavaElement)getImportContainer();
+                       return container.getHandleFromMemento(token, memento, workingCopyOwner);
+               case JEM_PACKAGEDECLARATION:
+                       String pkgName = memento.nextToken();
+                       JavaElement pkgDecl = (JavaElement)getPackageDeclaration(pkgName);
+                       return pkgDecl.getHandleFromMemento(memento, workingCopyOwner);
+               case JEM_TYPE:
+                       String typeName = memento.nextToken();
+                       JavaElement type = (JavaElement)getType(typeName);
+                       return type.getHandleFromMemento(memento, workingCopyOwner);
+       }
+       return null;
+  }
 
+  /**
+   * @see JavaElement#getHandleMementoDelimiter()
+   */
+  protected char getHandleMementoDelimiter() {
+       return JavaElement.JEM_COMPILATIONUNIT;
+  }
+  /**
+   * @see ICompilationUnit#getImport(String)
+   */
+  public IImportDeclaration getImport(String importName) {
+       return new ImportDeclaration((ImportContainer)getImportContainer(), importName);
+  }
+  /**
+   * @see ICompilationUnit#getImportContainer()
+   */
+  public IImportContainer getImportContainer() {
+       return new ImportContainer(this);
+  }
 
-/**
- * @see ICompilationUnit#getImports()
- */
-//public IImportDeclaration[] getImports() throws JavaModelException {
-//     IImportContainer container= getImportContainer();
-//     if (container.exists()) {
-//             IJavaElement[] elements= container.getChildren();
-//             IImportDeclaration[] imprts= new IImportDeclaration[elements.length];
-//             System.arraycopy(elements, 0, imprts, 0, elements.length);
-//             return imprts;
-//     } else if (!exists()) {
-//                     throw newNotPresentException();
-//     } else {
-//             return new IImportDeclaration[0];
-//     }
-//
-//}
-/**
- * @see org.eclipse.jdt.internal.compiler.env.ICompilationUnit#getMainTypeName()
- */
-public char[] getMainTypeName(){
-       String name= getElementName();
+
+  /**
+   * @see ICompilationUnit#getImports()
+   */
+  public IImportDeclaration[] getImports() throws JavaModelException {
+       IImportContainer container= getImportContainer();
+       if (container.exists()) {
+               IJavaElement[] elements= container.getChildren();
+               IImportDeclaration[] imprts= new IImportDeclaration[elements.length];
+               System.arraycopy(elements, 0, imprts, 0, elements.length);
+               return imprts;
+       } else if (!exists()) {
+                       throw newNotPresentException();
+       } else {
+               return new IImportDeclaration[0];
+       }
+
+  }
+
+  /**
+   * @see net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit#getMainTypeName()
+   */
+  public char[] getMainTypeName() {
+       String name = getElementName();
        //remove the .java
-       name= name.substring(0, name.length() - 5);
+       name = name.substring(0, name.length() - 5);
        return name.toCharArray();
-}
-/**
- * Returns <code>null</code>, this is not a working copy.
- *
- * @see IWorkingCopy#getOriginal(IJavaElement)
- */
-public IJavaElement getOriginal(IJavaElement workingCopyElement) {
-       return null;
-}
-/**
- * Returns <code>null</code>, this is not a working copy.
- *
- * @see IWorkingCopy#getOriginalElement()
- */
-public IJavaElement getOriginalElement() {
-       return null;
-}
-/**
- * @see ICompilationUnit#getPackageDeclaration(String)
- */
-public IPackageDeclaration getPackageDeclaration(String name) {
+  }
+
+  /**
+   * @see IWorkingCopy#getOriginal(IJavaElement)
+   * @deprecated
+   */
+  public IJavaElement getOriginal(IJavaElement workingCopyElement) {
+       // backward compatibility
+       if (!isWorkingCopy())
+         return null;
+       CompilationUnit cu = (CompilationUnit) workingCopyElement.getAncestor(COMPILATION_UNIT);
+       if (cu == null || !this.owner.equals(cu.owner)) {
+         return null;
+       }
+
+       return workingCopyElement.getPrimaryElement();
+  }
+
+  /**
+   * @see IWorkingCopy#getOriginalElement()
+   * @deprecated
+   */
+  public IJavaElement getOriginalElement() {
+       // backward compatibility
+       if (!isWorkingCopy())
+         return null;
+
+       return getPrimaryElement();
+  }
+
+  /*
+   * @see ICompilationUnit#getOwner()
+   */
+  public WorkingCopyOwner getOwner() {
+       return isPrimary() || !isWorkingCopy() ? null : this.owner;
+  }
+
+  /**
+   * @see ICompilationUnit#getPackageDeclaration(String)
+   */
+  public IPackageDeclaration getPackageDeclaration(String name) {
        return new PackageDeclaration(this, name);
-}
-/**
- * @see ICompilationUnit#getPackageDeclarations()
- */
-public IPackageDeclaration[] getPackageDeclarations() throws JavaModelException {
+  }
+
+  /**
+   * @see ICompilationUnit#getPackageDeclarations()
+   */
+  public IPackageDeclaration[] getPackageDeclarations() throws JavaModelException {
        ArrayList list = getChildrenOfType(PACKAGE_DECLARATION);
-       IPackageDeclaration[] array= new IPackageDeclaration[list.size()];
+       IPackageDeclaration[] array = new IPackageDeclaration[list.size()];
        list.toArray(array);
        return array;
-}
-/**
- * @see org.eclipse.jdt.internal.compiler.env.ICompilationUnit#getPackageName()
- */
-public char[][] getPackageName() {
+  }
+
+  /**
+   * @see net.sourceforge.phpdt.internal.compiler.env.ICompilationUnit#getPackageName()
+   */
+  public char[][] getPackageName() {
        return null;
-}
-/**
- * @see IJavaElement#getPath()
- */
-public IPath getPath() {
+  }
+
+  /**
+   * @see IJavaElement#getPath()
+   */
+  public IPath getPath() {
        PackageFragmentRoot root = this.getPackageFragmentRoot();
        if (root.isArchive()) {
-               return root.getPath();
+         return root.getPath();
        } else {
-               return this.getParent().getPath().append(this.getElementName());
+         return this.getParent().getPath().append(this.getElementName());
        }
-}
-/**
- * @see IJavaElement#getResource()
- */
-public IResource getResource() {
+  }
+
+  /*
+   * Returns the per working copy info for the receiver, or null if none exist. Note: the use count of the per working copy info is
+   * NOT incremented.
+   */
+  public JavaModelManager.PerWorkingCopyInfo getPerWorkingCopyInfo() {
+       return JavaModelManager.getJavaModelManager().getPerWorkingCopyInfo(this, false/* don't create */, false/* don't record usage */,
+               null/* no problem requestor needed */);
+  }
+
+  /*
+   * @see ICompilationUnit#getPrimary()
+   */
+  public ICompilationUnit getPrimary() {
+       return (ICompilationUnit) getPrimaryElement(true);
+  }
+
+  /*
+   * @see JavaElement#getPrimaryElement(boolean)
+   */
+  public IJavaElement getPrimaryElement(boolean checkOwner) {
+       if (checkOwner && isPrimary())
+         return this;
+       return new CompilationUnit((PackageFragment) getParent(), getElementName(), DefaultWorkingCopyOwner.PRIMARY);
+  }
+
+  /**
+   * @see IJavaElement#getResource()
+   */
+  public IResource getResource() {
        PackageFragmentRoot root = this.getPackageFragmentRoot();
        if (root.isArchive()) {
-               return root.getResource();
+         return root.getResource();
        } else {
-               return ((IContainer)this.getParent().getResource()).getFile(new Path(this.getElementName()));
+         return ((IContainer) this.getParent().getResource()).getFile(new Path(this.getElementName()));
        }
-}
+  }
 
-/**
- * @see ISourceReference#getSource()
- */
-public String getSource() throws JavaModelException {
+  /**
+   * @see ISourceReference#getSource()
+   */
+  public String getSource() throws JavaModelException {
        IBuffer buffer = getBuffer();
-       if (buffer == null) return ""; //$NON-NLS-1$
+       if (buffer == null)
+         return ""; //$NON-NLS-1$
        return buffer.getContents();
-}
-/**
- * @see ISourceReference#getSourceRange()
- */
-public ISourceRange getSourceRange() throws JavaModelException {
+  }
+
+  /**
+   * @see ISourceReference#getSourceRange()
+   */
+  public ISourceRange getSourceRange() throws JavaModelException {
        return ((CompilationUnitElementInfo) getElementInfo()).getSourceRange();
-}
-/**
- * @see ICompilationUnit#getType(String)
- */
-public IType getType(String name) {
+  }
+
+  /**
+   * @see ICompilationUnit#getType(String)
+   */
+  public IType getType(String name) {
        return new SourceType(this, name);
-}
-/**
- * @see ICompilationUnit#getTypes()
- */
-public IType[] getTypes() throws JavaModelException {
+  }
+
+  /**
+   * @see ICompilationUnit#getTypes()
+   */
+  public IType[] getTypes() throws JavaModelException {
        ArrayList list = getChildrenOfType(TYPE);
-       IType[] array= new IType[list.size()];
+       IType[] array = new IType[list.size()];
        list.toArray(array);
        return array;
-}
-public IResource getUnderlyingResource() throws JavaModelException {
-       if (FIX_BUG25184) {
-               return super.getUnderlyingResource();
-       } else {
-               return getResource();
-       }
-}
-/**
- * @see IWorkingCopy#getSharedWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
- */
-public IJavaElement getSharedWorkingCopy(IProgressMonitor pm, IBufferFactory factory, IProblemRequestor problemRequestor) throws JavaModelException {
-       
+  }
+
+  /**
+   * @see IJavaElement
+   */
+  public IResource getUnderlyingResource() throws JavaModelException {
+       if (isWorkingCopy() && !isPrimary())
+         return null;
+       return super.getUnderlyingResource();
+  }
+
+  ///**
+  // * @see IWorkingCopy#getSharedWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
+  // */
+  //public IJavaElement getSharedWorkingCopy(IProgressMonitor pm, IBufferFactory factory, IProblemRequestor problemRequestor)
+  // throws JavaModelException {
+  //
+  //   // if factory is null, default factory must be used
+  //   if (factory == null) factory = this.getBufferManager().getDefaultBufferFactory();
+  //
+  //   JavaModelManager manager = JavaModelManager.getJavaModelManager();
+  //
+  //   // In order to be shared, working copies have to denote the same compilation unit
+  //   // AND use the same buffer factory.
+  //   // Assuming there is a little set of buffer factories, then use a 2 level Map cache.
+  //   Map sharedWorkingCopies = manager.sharedWorkingCopies;
+  //
+  //   Map perFactoryWorkingCopies = (Map) sharedWorkingCopies.get(factory);
+  //   if (perFactoryWorkingCopies == null){
+  //           perFactoryWorkingCopies = new HashMap();
+  //           sharedWorkingCopies.put(factory, perFactoryWorkingCopies);
+  //   }
+  //   WorkingCopy workingCopy = (WorkingCopy)perFactoryWorkingCopies.get(this);
+  //   if (workingCopy != null) {
+  //           workingCopy.useCount++;
+  //
+  //           if (SHARED_WC_VERBOSE) {
+  //                   System.out.println("Incrementing use count of shared working copy " + workingCopy.toStringWithAncestors()); //$NON-NLS-1$
+  //           }
+  //
+  //           return workingCopy;
+  //   } else {
+  //           CreateWorkingCopyOperation op = new CreateWorkingCopyOperation(this, perFactoryWorkingCopies, factory, problemRequestor);
+  //           runOperation(op, pm);
+  //           return op.getResultElements()[0];
+  //   }
+  //}
+  ///**
+  // * @see IWorkingCopy#getWorkingCopy()
+  // */
+  //public IJavaElement getWorkingCopy() throws JavaModelException {
+  //   return this.getWorkingCopy(null, null, null);
+  //}
+  //
+  ///**
+  // * @see IWorkingCopy#getWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
+  // */
+  //public IJavaElement getWorkingCopy(IProgressMonitor pm, IBufferFactory factory, IProblemRequestor problemRequestor) throws
+  // JavaModelException {
+  //   CreateWorkingCopyOperation op = new CreateWorkingCopyOperation(this, null, factory, problemRequestor);
+  //   runOperation(op, pm);
+  //   return op.getResultElements()[0];
+  //}
+  /**
+   * @see IWorkingCopy#getSharedWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
+   * @deprecated
+   */
+  public IJavaElement getSharedWorkingCopy(IProgressMonitor pm, IBufferFactory factory, IProblemRequestor problemRequestor)
+         throws JavaModelException {
+
        // if factory is null, default factory must be used
-       if (factory == null) factory = this.getBufferManager().getDefaultBufferFactory();
+       if (factory == null)
+         factory = this.getBufferManager().getDefaultBufferFactory();
 
-       JavaModelManager manager = JavaModelManager.getJavaModelManager();
-       
-       // In order to be shared, working copies have to denote the same compilation unit 
-       // AND use the same buffer factory.
-       // Assuming there is a little set of buffer factories, then use a 2 level Map cache.
-       Map sharedWorkingCopies = manager.sharedWorkingCopies;
-       
-       Map perFactoryWorkingCopies = (Map) sharedWorkingCopies.get(factory);
-       if (perFactoryWorkingCopies == null){
-               perFactoryWorkingCopies = new HashMap();
-               sharedWorkingCopies.put(factory, perFactoryWorkingCopies);
-       }
-       WorkingCopy workingCopy = (WorkingCopy)perFactoryWorkingCopies.get(this);
-       if (workingCopy != null) {
-               workingCopy.useCount++;
+       return getWorkingCopy(BufferFactoryWrapper.create(factory), problemRequestor, pm);
+  }
 
-               if (SHARED_WC_VERBOSE) {
-                       System.out.println("Incrementing use count of shared working copy " + workingCopy.toStringWithAncestors()); //$NON-NLS-1$
-               }
+  /**
+   * @see IWorkingCopy#getWorkingCopy()
+   * @deprecated
+   */
+  public IJavaElement getWorkingCopy() throws JavaModelException {
+       return getWorkingCopy(null);
+  }
 
-               return workingCopy;
-       } else {
-               CreateWorkingCopyOperation op = new CreateWorkingCopyOperation(this, perFactoryWorkingCopies, factory, problemRequestor);
-               runOperation(op, pm);
-               return op.getResultElements()[0];
+  /**
+   * @see ICompilationUnit#getWorkingCopy(IProgressMonitor)
+   */
+  public ICompilationUnit getWorkingCopy(IProgressMonitor monitor) throws JavaModelException {
+       return getWorkingCopy(new WorkingCopyOwner() {/* non shared working copy */
+       }, null/* no problem requestor */, monitor);
+  }
+
+  /**
+   * @see IWorkingCopy#getWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
+   * @deprecated
+   */
+  public IJavaElement getWorkingCopy(IProgressMonitor monitor, IBufferFactory factory, IProblemRequestor problemRequestor)
+         throws JavaModelException {
+       return getWorkingCopy(BufferFactoryWrapper.create(factory), problemRequestor, monitor);
+  }
+
+  /**
+   * @see ICompilationUnit#getWorkingCopy(WorkingCopyOwner, IProblemRequestor, IProgressMonitor)
+   */
+  public ICompilationUnit getWorkingCopy(WorkingCopyOwner workingCopyOwner, IProblemRequestor problemRequestor,
+         IProgressMonitor monitor) throws JavaModelException {
+       if (!isPrimary())
+         return this;
+
+       JavaModelManager manager = JavaModelManager.getJavaModelManager();
+
+       CompilationUnit workingCopy = new CompilationUnit((PackageFragment) getParent(), getElementName(), workingCopyOwner);
+       JavaModelManager.PerWorkingCopyInfo perWorkingCopyInfo = manager.getPerWorkingCopyInfo(workingCopy, false/* don't create */,
+               true/* record usage */, null/* not used since don't create */);
+       if (perWorkingCopyInfo != null) {
+         return perWorkingCopyInfo.getWorkingCopy(); // return existing handle instead of the one created above
        }
-}
-/**
- * @see IWorkingCopy#getWorkingCopy()
- */
-public IJavaElement getWorkingCopy() throws JavaModelException {
-       return this.getWorkingCopy(null, null, null);
-}
+       BecomeWorkingCopyOperation op = new BecomeWorkingCopyOperation(workingCopy, problemRequestor);
+       op.runOperation(monitor);
+       return workingCopy;
+  }
 
-/**
- * @see IWorkingCopy#getWorkingCopy(IProgressMonitor, IBufferFactory, IProblemRequestor)
- */
-public IJavaElement getWorkingCopy(IProgressMonitor pm, IBufferFactory factory, IProblemRequestor problemRequestor) throws JavaModelException {
-       CreateWorkingCopyOperation op = new CreateWorkingCopyOperation(this, null, factory, problemRequestor);
-       runOperation(op, pm);
-       return op.getResultElements()[0];
-}
+  /**
+   * If I am not open, return true to avoid parsing.
+   *
+   * @see IParent#hasChildren()
+   */
+  public boolean hasChildren() throws JavaModelException {
+       //      if (isOpen()) {
+       //              return getChildren().length > 0;
+       //      } else {
+       //              return true;
+       //      }
+       return false;
+  }
 
-/**
- * @see Openable#hasBuffer()
- */
-protected boolean hasBuffer() {
+  /**
+   * @see Openable#hasBuffer()
+   */
+  protected boolean hasBuffer() {
        return true;
-}
-/**
- * If I am not open, return true to avoid parsing.
- *
- * @see IParent#hasChildren()
- */
-public boolean hasChildren() throws JavaModelException {
-//     if (isOpen()) {
-//             return getChildren().length > 0;
-//     } else {
-//             return true;
-//     }
-  return false;
-}
-/**
- * Returns false, this is not a working copy.
- *
- * @see IWorkingCopy#isBasedOn(IResource)
- */
-public boolean isBasedOn(IResource resource) {
-       return false;
-}
-/**
- * @see IOpenable#isConsistent()
- */
-public boolean isConsistent() throws JavaModelException {
+  }
+
+  /*
+   * @see ICompilationUnit#hasResourceChanged()
+   */
+  public boolean hasResourceChanged() {
+       if (!isWorkingCopy())
+         return false;
+
+       // if resource got deleted, then #getModificationStamp() will answer IResource.NULL_STAMP, which is always different from the
+       // cached
+       // timestamp
+       Object info = JavaModelManager.getJavaModelManager().getInfo(this);
+       if (info == null)
+         return false;
+       return ((CompilationUnitElementInfo) info).timestamp != getResource().getModificationStamp();
+  }
+
+  /**
+   * @see IWorkingCopy#isBasedOn(IResource)
+   * @deprecated
+   */
+  public boolean isBasedOn(IResource resource) {
+       if (!isWorkingCopy())
+         return false;
+       if (!getResource().equals(resource))
+         return false;
+       return !hasResourceChanged();
+  }
+
+  /**
+   * @see IOpenable#isConsistent()
+   */
+  public boolean isConsistent() {
        return JavaModelManager.getJavaModelManager().getElementsOutOfSynchWithBuffers().get(this) == null;
-}
-/**
- * @see Openable#isSourceElement()
- */
-protected boolean isSourceElement() {
+  }
+
+  /**
+   *
+   * @see IOpenable
+   */
+  public boolean isOpen() {
+       Object info = JavaModelManager.getJavaModelManager().getInfo(this);
+       return info != null && ((CompilationUnitElementInfo) info).isOpen();
+  }
+
+  public boolean isPrimary() {
+       return this.owner == DefaultWorkingCopyOwner.PRIMARY;
+  }
+
+  /**
+   * @see Openable#isSourceElement()
+   */
+  protected boolean isSourceElement() {
        return true;
-}
-/**
- * @see IWorkingCopy#isWorkingCopy()
- */
-public boolean isWorkingCopy() {
-       return false;
-}
-/**
- * @see IOpenable#makeConsistent(IProgressMonitor)
- */
-public void makeConsistent(IProgressMonitor monitor) throws JavaModelException {
-       if (!isConsistent()) { // TODO: this code isn't synchronized with regular opening of a working copy
-               // create a new info and make it the current info
-               OpenableElementInfo info = createElementInfo();
-               buildStructure(info, monitor);
+  }
+
+  protected boolean isValidCompilationUnit() {
+       IPackageFragmentRoot root = getPackageFragmentRoot();
+       try {
+         if (root.getKind() != IPackageFragmentRoot.K_SOURCE)
+               return false;
+       } catch (JavaModelException e) {
+         return false;
        }
-}
+       //      IResource resource = getResource();
+       //      if (resource != null) {
+       //              char[][] inclusionPatterns = ((PackageFragmentRoot)root).fullInclusionPatternChars();
+       //              char[][] exclusionPatterns = ((PackageFragmentRoot)root).fullExclusionPatternChars();
+       //              if (ProjectPrefUtil.isExcluded(resource, inclusionPatterns, exclusionPatterns)) return false;
+       //      }
+       if (!Util.isValidCompilationUnitName(getElementName()))
+         return false;
+       return true;
+  }
 
-/**
- * @see ISourceManipulation#move(IJavaElement, IJavaElement, String, boolean, IProgressMonitor)
- */
-public void move(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor) throws JavaModelException {
+  /*
+   * @see ICompilationUnit#isWorkingCopy()
+   */
+  public boolean isWorkingCopy() {
+       // For backward compatibility, non primary working copies are always returning true; in removal
+       // delta, clients can still check that element was a working copy before being discarded.
+       return !isPrimary() || getPerWorkingCopyInfo() != null;
+  }
+
+  /**
+   * @see IOpenable#makeConsistent(IProgressMonitor)
+   */
+  public void makeConsistent(IProgressMonitor monitor) throws JavaModelException {
+       makeConsistent(false/* don't create AST */, 0, monitor);
+  }
+
+  public Object makeConsistent(boolean createAST, int astLevel, IProgressMonitor monitor) throws JavaModelException {
+       if (isConsistent())
+         return null;
+
+       // create a new info and make it the current info
+       // (this will remove the info and its children just before storing the new infos)
+       //      if (createAST) {
+       //              ASTHolderCUInfo info = new ASTHolderCUInfo();
+       //              info.astLevel = astLevel;
+       //              openWhenClosed(info, monitor);
+       //              net.sourceforge.phpdt.core.dom.CompilationUnit result = info.ast;
+       //              info.ast = null;
+       //              return result;
+       //      } else {
+       openWhenClosed(createElementInfo(), monitor);
+       return null;
+       //      }
+  }
+
+  //public net.sourceforge.phpdt.core.dom.CompilationUnit makeConsistent(boolean createAST, int astLevel, IProgressMonitor monitor)
+  // throws JavaModelException {
+  //   if (isConsistent()) return null;
+  //
+  //   // create a new info and make it the current info
+  //   // (this will remove the info and its children just before storing the new infos)
+  //   if (createAST) {
+  //           ASTHolderCUInfo info = new ASTHolderCUInfo();
+  //           info.astLevel = astLevel;
+  //           openWhenClosed(info, monitor);
+  //           net.sourceforge.phpdt.core.dom.CompilationUnit result = info.ast;
+  //           info.ast = null;
+  //           return result;
+  //   } else {
+  //           openWhenClosed(createElementInfo(), monitor);
+  //           return null;
+  //   }
+  //}
+
+  /**
+   * @see ISourceManipulation#move(IJavaElement, IJavaElement, String, boolean, IProgressMonitor)
+   */
+  public void move(IJavaElement container, IJavaElement sibling, String rename, boolean force, IProgressMonitor monitor)
+         throws JavaModelException {
        if (container == null) {
-               throw new IllegalArgumentException(Util.bind("operation.nullContainer")); //$NON-NLS-1$
+         throw new IllegalArgumentException(Util.bind("operation.nullContainer")); //$NON-NLS-1$
        }
-       IJavaElement[] elements= new IJavaElement[] {this};
-       IJavaElement[] containers= new IJavaElement[] {container};
-       
-       String[] renamings= null;
+       IJavaElement[] elements = new IJavaElement[] { this };
+       IJavaElement[] containers = new IJavaElement[] { container };
+
+       String[] renamings = null;
        if (rename != null) {
-               renamings= new String[] {rename};
+         renamings = new String[] { rename };
        }
        getJavaModel().move(elements, containers, null, renamings, force, monitor);
-}
+  }
 
-/**
- * @see Openable#openBuffer(IProgressMonitor)
- */
-protected IBuffer openBuffer(IProgressMonitor pm) throws JavaModelException {
+  ///**
+  // * @see Openable#openBuffer(IProgressMonitor)
+  // */
+  //protected IBuffer openBuffer(IProgressMonitor pm) throws JavaModelException {
+  //
+  //   // create buffer - compilation units only use default buffer factory
+  //   BufferManager bufManager = getBufferManager();
+  //   IBuffer buffer = getBufferFactory().createBuffer(this);
+  //   if (buffer == null) return null;
+  //
+  //   // set the buffer source
+  //   if (buffer.getCharacters() == null){
+  //           IFile file = (IFile)this.getResource();
+  //           if (file == null || !file.exists()) throw newNotPresentException();
+  //           buffer.setContents(ProjectPrefUtil.getResourceContentsAsCharArray(file));
+  //   }
+  //
+  //   // add buffer to buffer cache
+  //   bufManager.addBuffer(buffer);
+  //
+  //   // listen to buffer changes
+  //   buffer.addBufferChangedListener(this);
+  //
+  //   return buffer;
+  //}
+  /**
+   * @see Openable#openBuffer(IProgressMonitor, Object)
+   */
+  protected IBuffer openBuffer(IProgressMonitor pm, Object info) throws JavaModelException {
+
+       // create buffer
+       boolean isWorkingCopy = isWorkingCopy();
+       IBuffer buffer = isWorkingCopy ? this.owner.createBuffer(this) : BufferManager.getDefaultBufferManager().createBuffer(this);
+       if (buffer == null)
+         return null;
 
-       // create buffer -  compilation units only use default buffer factory
-       BufferManager bufManager = getBufferManager();
-       IBuffer buffer = getBufferFactory().createBuffer(this);
-       if (buffer == null) return null;
-       
        // set the buffer source
-       if (buffer.getCharacters() == null){
-               IFile file = (IFile)this.getResource();
-               if (file == null || !file.exists()) throw newNotPresentException();
+       if (buffer.getCharacters() == null) {
+         if (isWorkingCopy) {
+               ICompilationUnit original;
+               if (!isPrimary()
+                       && (original = new CompilationUnit((PackageFragment) getParent(), getElementName(), DefaultWorkingCopyOwner.PRIMARY))
+                               .isOpen()) {
+                 buffer.setContents(original.getSource());
+               } else {
+                 IFile file = (IFile) getResource();
+                 if (file == null || !file.exists()) {
+                       // initialize buffer with empty contents
+                       buffer.setContents(CharOperation.NO_CHAR);
+                 } else {
+                       buffer.setContents(Util.getResourceContentsAsCharArray(file));
+                 }
+               }
+         } else {
+               IFile file = (IFile) this.getResource();
+               if (file == null || !file.exists())
+                 throw newNotPresentException();
                buffer.setContents(Util.getResourceContentsAsCharArray(file));
+         }
        }
 
        // add buffer to buffer cache
+       BufferManager bufManager = getBufferManager();
        bufManager.addBuffer(buffer);
-                       
+
        // listen to buffer changes
        buffer.addBufferChangedListener(this);
-       
+
        return buffer;
-}
-protected void openParent(IProgressMonitor pm) throws JavaModelException {
-       if (FIX_BUG25184) {
-               super.openParent(pm);
-       } else {
-               try {
-                       super.openParent(pm);
-               } catch(JavaModelException e){
-                       // allow parent to not exist for compilation units defined outside classpath
-                       if (!e.isDoesNotExist()){ 
-                               throw e;
-                       }
-               }
-       }
-}
-protected boolean parentExists() {
-       if (FIX_BUG25184) {
-               return super.parentExists();
-       } else {
-               return true; // tolerate units outside classpath
+  }
+
+  /*
+   * @see Openable#openParent
+   */
+  protected void openParent(Object childInfo, HashMap newElements, IProgressMonitor pm) throws JavaModelException {
+       try {
+         super.openParent(childInfo, newElements, pm);
+       } catch (JavaModelException e) {
+         // allow parent to not exist for working copies defined outside classpath
+         if (!isWorkingCopy() && !e.isDoesNotExist()) {
+               throw e;
+         }
        }
-}
+  }
 
-/**
- * @see IWorkingCopy#reconcile()
- */
-public IMarker[] reconcile() throws JavaModelException {
-       // Reconciling is not supported on non working copies
+  /**
+   * @see ICompilationUnit#reconcile()
+   * @deprecated
+   */
+  public IMarker[] reconcile() throws JavaModelException {
+       reconcile(NO_AST, false/* don't force problem detection */, null/* use primary owner */, null/* no progress monitor */);
        return null;
-}
+  }
 
-/**
- * @see IWorkingCopy#reconcile(boolean, IProgressMonitor)
- */
-public void reconcile(
-       boolean forceProblemDetection,
-       IProgressMonitor monitor)
-       throws JavaModelException {
-       // Reconciling is not supported on non working copies
-}
+  /**
+   * @see ICompilationUnit#reconcile(int, boolean, WorkingCopyOwner, IProgressMonitor)
+   */
+  public void reconcile(boolean forceProblemDetection, IProgressMonitor monitor) throws JavaModelException {
+       reconcile(NO_AST, forceProblemDetection, null/* use primary owner */, monitor);
+  }
 
-/**
- * @see ISourceManipulation#rename(String, boolean, IProgressMonitor)
- */
-public void rename(String name, boolean force, IProgressMonitor monitor) throws JavaModelException {
+  /**
+   * @see ICompilationUnit#reconcile(int, boolean, WorkingCopyOwner, IProgressMonitor)
+   * @since 3.0
+   */
+  //public net.sourceforge.phpdt.core.dom.CompilationUnit reconcile(
+  public Object reconcile(int astLevel, boolean forceProblemDetection, WorkingCopyOwner workingCopyOwner, IProgressMonitor monitor)
+         throws JavaModelException {
+
+       if (!isWorkingCopy())
+         return null; // Reconciling is not supported on non working copies
+       if (workingCopyOwner == null)
+         workingCopyOwner = DefaultWorkingCopyOwner.PRIMARY;
+
+       boolean createAST = false;
+       //      if (astLevel == AST.JLS2) {
+       //              // client asking for level 2 AST; these are supported
+       //              createAST = true;
+       //      } else if (astLevel == AST.JLS3) {
+       //              // client asking for level 3 ASTs; these are not supported
+       //              // TODO (jerome) - these should also be supported in 1.5 stream
+       //              createAST = false;
+       //      } else {
+       //              // client asking for no AST (0) or unknown ast level
+       //              // either way, request denied
+       //              createAST = false;
+       //      }
+       ReconcileWorkingCopyOperation op = new ReconcileWorkingCopyOperation(this, createAST, astLevel, forceProblemDetection,
+               workingCopyOwner);
+       op.runOperation(monitor);
+       //      return op.ast;
+       return null;
+  }
+
+  /**
+   * @see ISourceManipulation#rename(String, boolean, IProgressMonitor)
+   */
+  public void rename(String name, boolean force, IProgressMonitor monitor) throws JavaModelException {
        if (name == null) {
-               throw new IllegalArgumentException(Util.bind("operation.nullName")); //$NON-NLS-1$
+         throw new IllegalArgumentException(Util.bind("operation.nullName")); //$NON-NLS-1$
        }
-       IJavaElement[] elements= new IJavaElement[] {this};
-       IJavaElement[] dests= new IJavaElement[] {this.getParent()};
-       String[] renamings= new String[] {name};
+       IJavaElement[] elements = new IJavaElement[] { this };
+       IJavaElement[] dests = new IJavaElement[] { this.getParent() };
+       String[] renamings = new String[] { name };
        getJavaModel().rename(elements, dests, renamings, force, monitor);
-}
-/**
- * Does nothing - this is not a working copy.
- *
- * @see IWorkingCopy#restore()
- */
-public void restore () throws JavaModelException {
-}
-/**
- * @see ICodeAssist#codeComplete(int, ICodeCompletionRequestor)
- * @deprecated - use codeComplete(int, ICompletionRequestor)
- */
-//public void codeComplete(int offset, final ICodeCompletionRequestor requestor) throws JavaModelException {
-//     
-//     if (requestor == null){
-//             codeComplete(offset, (ICompletionRequestor)null);
-//             return;
-//     }
-//     codeComplete(
-//             offset,
-//             new ICompletionRequestor(){
-//                     public void acceptAnonymousType(char[] superTypePackageName,char[] superTypeName,char[][] parameterPackageNames,char[][] parameterTypeNames,char[][] parameterNames,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance){
-//                     }
-//                     public void acceptClass(char[] packageName, char[] className, char[] completionName, int modifiers, int completionStart, int completionEnd, int relevance) {
-//                             requestor.acceptClass(packageName, className, completionName, modifiers, completionStart, completionEnd);
-//                     }
-//                     public void acceptError(IProblem error) {
-//                             if (true) return; // was disabled in 1.0
-//
-//                             try {
-//                                     IMarker marker = ResourcesPlugin.getWorkspace().getRoot().createMarker(IJavaModelMarker.TRANSIENT_PROBLEM);
-//                                     marker.setAttribute(IJavaModelMarker.ID, error.getID());
-//                                     marker.setAttribute(IMarker.CHAR_START, error.getSourceStart());
-//                                     marker.setAttribute(IMarker.CHAR_END, error.getSourceEnd() + 1);
-//                                     marker.setAttribute(IMarker.LINE_NUMBER, error.getSourceLineNumber());
-//                                     marker.setAttribute(IMarker.MESSAGE, error.getMessage());
-//                                     marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
-//                                     requestor.acceptError(marker);
-//                             } catch(CoreException e){
-//                             }
-//                     }
-//                     public void acceptField(char[] declaringTypePackageName, char[] declaringTypeName, char[] name, char[] typePackageName, char[] typeName, char[] completionName, int modifiers, int completionStart, int completionEnd, int relevance) {
-//                             requestor.acceptField(declaringTypePackageName, declaringTypeName, name, typePackageName, typeName, completionName, modifiers, completionStart, completionEnd);
-//                     }
-//                     public void acceptInterface(char[] packageName,char[] interfaceName,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance) {
-//                             requestor.acceptInterface(packageName, interfaceName, completionName, modifiers, completionStart, completionEnd);
-//                     }
-//                     public void acceptKeyword(char[] keywordName,int completionStart,int completionEnd, int relevance){
-//                             requestor.acceptKeyword(keywordName, completionStart, completionEnd);
-//                     }
-//                     public void acceptLabel(char[] labelName,int completionStart,int completionEnd, int relevance){
-//                             requestor.acceptLabel(labelName, completionStart, completionEnd);
-//                     }
-//                     public void acceptLocalVariable(char[] name,char[] typePackageName,char[] typeName,int modifiers,int completionStart,int completionEnd, int relevance){
-//                             // ignore
-//                     }
-//                     public void acceptMethod(char[] declaringTypePackageName,char[] declaringTypeName,char[] selector,char[][] parameterPackageNames,char[][] parameterTypeNames,char[][] parameterNames,char[] returnTypePackageName,char[] returnTypeName,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance){
-//                             // skip parameter names
-//                             requestor.acceptMethod(declaringTypePackageName, declaringTypeName, selector, parameterPackageNames, parameterTypeNames, returnTypePackageName, returnTypeName, completionName, modifiers, completionStart, completionEnd);
-//                     }
-//                     public void acceptMethodDeclaration(char[] declaringTypePackageName,char[] declaringTypeName,char[] selector,char[][] parameterPackageNames,char[][] parameterTypeNames,char[][] parameterNames,char[] returnTypePackageName,char[] returnTypeName,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance){
-//                             // ignore
-//                     }
-//                     public void acceptModifier(char[] modifierName,int completionStart,int completionEnd, int relevance){
-//                             requestor.acceptModifier(modifierName, completionStart, completionEnd);
-//                     }
-//                     public void acceptPackage(char[] packageName,char[] completionName,int completionStart,int completionEnd, int relevance){
-//                             requestor.acceptPackage(packageName, completionName, completionStart, completionEnd);
-//                     }
-//                     public void acceptType(char[] packageName,char[] typeName,char[] completionName,int completionStart,int completionEnd, int relevance){
-//                             requestor.acceptType(packageName, typeName, completionName, completionStart, completionEnd);
-//                     }
-//                     public void acceptVariableName(char[] typePackageName,char[] typeName,char[] name,char[] completionName,int completionStart,int completionEnd, int relevance){
-//                             // ignore
-//                     }
-//             });
-//}
-/**
- * @see JavaElement#rootedAt(IJavaProject)
- */
-public IJavaElement rootedAt(IJavaProject project) {
-       return
-               new CompilationUnit(
-                       (IPackageFragment)((JavaElement)fParent).rootedAt(project), 
-                       fName);
-}
-
-}
+  }
+
+  /*
+   * @see ICompilationUnit
+   */
+  public void restore() throws JavaModelException {
+
+       if (!isWorkingCopy())
+         return;
+
+       CompilationUnit original = (CompilationUnit) getOriginalElement();
+       IBuffer buffer = this.getBuffer();
+       if (buffer == null)
+         return;
+       buffer.setContents(original.getContents());
+       updateTimeStamp(original);
+       makeConsistent(null);
+  }
+
+//  /**
+//   * @see ICodeAssist#codeComplete(int, ICodeCompletionRequestor)
+//   * @deprecated - use codeComplete(int, ICompletionRequestor)
+//   */
+  //public void codeComplete(int offset, final ICodeCompletionRequestor requestor) throws JavaModelException {
+  //
+  //   if (requestor == null){
+  //           codeComplete(offset, (ICompletionRequestor)null);
+  //           return;
+  //   }
+  //   codeComplete(
+  //           offset,
+  //           new ICompletionRequestor(){
+  //                   public void acceptAnonymousType(char[] superTypePackageName,char[] superTypeName,char[][] parameterPackageNames,char[][]
+  // parameterTypeNames,char[][] parameterNames,char[] completionName,int modifiers,int completionStart,int completionEnd, int
+  // relevance){
+  //                   }
+  //                   public void acceptClass(char[] packageName, char[] className, char[] completionName, int modifiers, int completionStart, int
+  // completionEnd, int relevance) {
+  //                           requestor.acceptClass(packageName, className, completionName, modifiers, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptError(IProblem error) {
+  //                           if (true) return; // was disabled in 1.0
+  //
+  //                           try {
+  //                                   IMarker marker = ResourcesPlugin.getWorkspace().getRoot().createMarker(IJavaModelMarker.TRANSIENT_PROBLEM);
+  //                                   marker.setAttribute(IJavaModelMarker.ID, error.getID());
+  //                                   marker.setAttribute(IMarker.CHAR_START, error.getSourceStart());
+  //                                   marker.setAttribute(IMarker.CHAR_END, error.getSourceEnd() + 1);
+  //                                   marker.setAttribute(IMarker.LINE_NUMBER, error.getSourceLineNumber());
+  //                                   marker.setAttribute(IMarker.MESSAGE, error.getMessage());
+  //                                   marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
+  //                                   requestor.acceptError(marker);
+  //                           } catch(CoreException e){
+  //                           }
+  //                   }
+  //                   public void acceptField(char[] declaringTypePackageName, char[] declaringTypeName, char[] name, char[] typePackageName, char[]
+  // typeName, char[] completionName, int modifiers, int completionStart, int completionEnd, int relevance) {
+  //                           requestor.acceptField(declaringTypePackageName, declaringTypeName, name, typePackageName, typeName, completionName, modifiers,
+  // completionStart, completionEnd);
+  //                   }
+  //                   public void acceptInterface(char[] packageName,char[] interfaceName,char[] completionName,int modifiers,int completionStart,int
+  // completionEnd, int relevance) {
+  //                           requestor.acceptInterface(packageName, interfaceName, completionName, modifiers, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptKeyword(char[] keywordName,int completionStart,int completionEnd, int relevance){
+  //                           requestor.acceptKeyword(keywordName, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptLabel(char[] labelName,int completionStart,int completionEnd, int relevance){
+  //                           requestor.acceptLabel(labelName, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptLocalVariable(char[] name,char[] typePackageName,char[] typeName,int modifiers,int completionStart,int
+  // completionEnd, int relevance){
+  //                           // ignore
+  //                   }
+  //                   public void acceptMethod(char[] declaringTypePackageName,char[] declaringTypeName,char[] selector,char[][]
+  // parameterPackageNames,char[][] parameterTypeNames,char[][] parameterNames,char[] returnTypePackageName,char[]
+  // returnTypeName,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance){
+  //                           // skip parameter names
+  //                           requestor.acceptMethod(declaringTypePackageName, declaringTypeName, selector, parameterPackageNames, parameterTypeNames,
+  // returnTypePackageName, returnTypeName, completionName, modifiers, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptMethodDeclaration(char[] declaringTypePackageName,char[] declaringTypeName,char[] selector,char[][]
+  // parameterPackageNames,char[][] parameterTypeNames,char[][] parameterNames,char[] returnTypePackageName,char[]
+  // returnTypeName,char[] completionName,int modifiers,int completionStart,int completionEnd, int relevance){
+  //                           // ignore
+  //                   }
+  //                   public void acceptModifier(char[] modifierName,int completionStart,int completionEnd, int relevance){
+  //                           requestor.acceptModifier(modifierName, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptPackage(char[] packageName,char[] completionName,int completionStart,int completionEnd, int relevance){
+  //                           requestor.acceptPackage(packageName, completionName, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptType(char[] packageName,char[] typeName,char[] completionName,int completionStart,int completionEnd, int
+  // relevance){
+  //                           requestor.acceptType(packageName, typeName, completionName, completionStart, completionEnd);
+  //                   }
+  //                   public void acceptVariableName(char[] typePackageName,char[] typeName,char[] name,char[] completionName,int completionStart,int
+  // completionEnd, int relevance){
+  //                           // ignore
+  //                   }
+  //           });
+  //}
+  ///**
+  // * @see JavaElement#rootedAt(IJavaProject)
+  // */
+  //public IJavaElement rootedAt(IJavaProject project) {
+  //   return
+  //           new CompilationUnit(
+  //                   (IPackageFragment)((JavaElement)parent).rootedAt(project),
+  //                   name);
+  //}
+
+  /*
+   * Assume that this is a working copy
+   */
+  protected void updateTimeStamp(CompilationUnit original) throws JavaModelException {
+       long timeStamp = ((IFile) original.getResource()).getModificationStamp();
+       if (timeStamp == IResource.NULL_STAMP) {
+         throw new JavaModelException(new JavaModelStatus(IJavaModelStatusConstants.INVALID_RESOURCE));
+       }
+       ((CompilationUnitElementInfo) getElementInfo()).timestamp = timeStamp;
+  }
+}
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