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   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.core;
  12
  13 import net.sourceforge.phpdt.core.ICompilationUnit;
  14 import net.sourceforge.phpdt.core.IJavaElement;
  15 import net.sourceforge.phpdt.core.IJavaModelStatus;
  16 import net.sourceforge.phpdt.core.IJavaModelStatusConstants;
  17 import net.sourceforge.phpdt.core.IPackageDeclaration;
  18 import net.sourceforge.phpdt.core.IType;
  19 import net.sourceforge.phpdt.core.JavaModelException;
  20 import net.sourceforge.phpdt.core.jdom.DOMFactory;
  21 import net.sourceforge.phpdt.core.jdom.IDOMNode;
  22 import net.sourceforge.phpdt.core.jdom.IDOMPackage;
  23 import net.sourceforge.phpdt.internal.core.jdom.DOMNode;
  24
  25 import org.eclipse.core.runtime.IStatus;
  26
  27 /**
  28  * <p>This operation adds/replaces a package declaration in an existing compilation unit.
  29  * If the compilation unit already includes the specified package declaration,
  30  * it is not generated (it does not generate duplicates).
  31  *
  32  * <p>Required Attributes:<ul>
  33  *  <li>Compilation unit element
  34  *  <li>Package name
  35  * </ul>
  36  */
  37 public class CreatePackageDeclarationOperation extends CreateElementInCUOperation {
  38         /**
  39          * The name of the package declaration being created
  40          */
  41         protected String fName = null;
  42 /**
  43  * When executed, this operation will add a package declaration to the given compilation unit.
  44  */
  45 public CreatePackageDeclarationOperation(String name, ICompilationUnit parentElement) {
  46         super(parentElement);
  47         fName= name;
  48 }
  49 /**
  50  * @see CreateTypeMemberOperation#generateElementDOM
  51  */
  52 protected IDOMNode generateElementDOM() throws JavaModelException {
  53         IJavaElement[] children = getCompilationUnit().getChildren();
  54         //look for an existing package declaration
  55         for (int i = 0; i < children.length; i++) {
  56                 if (children[i].getElementType() ==  IJavaElement.PACKAGE_DECLARATION) {
  57                         IPackageDeclaration pck = (IPackageDeclaration) children[i];
  58                         IDOMPackage pack = (IDOMPackage) ((JavaElement)pck).findNode(fCUDOM);
  59                         if (!pack.getName().equals(fName)) {
  60                                  // get the insertion position before setting the name, as this makes it a detailed node
  61                                  // thus the start position is always 0
  62                                 DOMNode node = (DOMNode)pack;
  63                                 fInsertionPosition = node.getStartPosition();
  64                                 fReplacementLength = node.getEndPosition() - fInsertionPosition + 1;
  65                                 pack.setName(fName);
  66                                 fCreatedElement = (net.sourceforge.phpdt.internal.core.jdom.DOMNode)pack;
  67                         } else {
  68                                 //equivalent package declaration already exists
  69                                 fCreationOccurred= false;
  70                         }
  71
  72                         return null;
  73                 }
  74         }
  75         IDOMPackage pack = (new DOMFactory()).createPackage();
  76         pack.setName(fName);
  77         return pack;
  78 }
  79 /**
  80  * Creates and returns the handle for the element this operation created.
  81  */
  82 protected IJavaElement generateResultHandle() {
  83         return getCompilationUnit().getPackageDeclaration(fName);
  84 }
  85 /**
  86  * @see CreateElementInCUOperation#getMainTaskName()
  87  */
  88 public String getMainTaskName(){
  89         return Util.bind("operation.createPackageProgress"); //$NON-NLS-1$
  90 }
  91 /**
  92  * Sets the correct position for new package declaration:<ul>
  93  * <li> before the first import
  94  * <li> if no imports, before the first type
  95  * <li> if no type - first thing in the CU
  96  * <li>
  97  */
  98 protected void initializeDefaultPosition() {
  99         try {
 100                 ICompilationUnit cu = getCompilationUnit();
 101 //              IImportDeclaration[] imports = cu.getImports();
 102 //              if (imports.length > 0) {
 103 //                      createBefore(imports[0]);
 104 //                      return;
 105 //              }
 106                 IType[] types = cu.getTypes();
 107                 if (types.length > 0) {
 108                         createBefore(types[0]);
 109                         return;
 110                 }
 111         } catch (JavaModelException npe) {
 112         }
 113 }
 114 /**
 115  * Possible failures: <ul>
 116  *  <li>NO_ELEMENTS_TO_PROCESS - no compilation unit was supplied to the operation
 117  *  <li>INVALID_NAME - a name supplied to the operation was not a valid
 118  *              package declaration name.
 119  * </ul>
 120  * @see IJavaModelStatus
 121  * @see JavaConventions
 122  */
 123 public IJavaModelStatus verify() {
 124         IJavaModelStatus status = super.verify();
 125         if (!status.isOK()) {
 126                 return status;
 127         }
 128 //      if (JavaConventions.validatePackageName(fName).getSeverity() == IStatus.ERROR) {
 129 //              return new JavaModelStatus(IJavaModelStatusConstants.INVALID_NAME, fName);
 130 //      }
 131         return JavaModelStatus.VERIFIED_OK;
 132 }
 133 }