net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/core/builder/PHPBuilder.java

   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.builder;
  12 import java.io.DataInputStream;
  13 import java.io.DataOutputStream;
  14 import java.io.IOException;
  15 import java.util.ArrayList;
  16 import java.util.Date;
  17 import java.util.HashSet;
  18 import java.util.Iterator;
  19 import java.util.Map;
  20 import net.sourceforge.phpdt.core.IClasspathEntry;
  21 import net.sourceforge.phpdt.core.IJavaModelMarker;
  22 import net.sourceforge.phpdt.core.JavaModelException;
  23 import net.sourceforge.phpdt.core.JavaCore;
  24 import net.sourceforge.phpdt.core.compiler.CharOperation;
  25 import net.sourceforge.phpdt.internal.core.JavaModel;
  26 import net.sourceforge.phpdt.internal.core.JavaModelManager;
  27 import net.sourceforge.phpdt.internal.core.JavaProject;
  28 import net.sourceforge.phpdt.internal.core.Util;
  29 import net.sourceforge.phpdt.internal.core.util.SimpleLookupTable;
  30 import net.sourceforge.phpdt.internal.ui.util.PHPFileUtil;
  31 import net.sourceforge.phpeclipse.PHPeclipsePlugin;
  32 import net.sourceforge.phpeclipse.builder.IdentifierIndexManager;
  33 import net.sourceforge.phpeclipse.phpeditor.PHPParserAction;
  34 import net.sourceforge.phpeclipse.resourcesview.PHPProject;
  35 import org.eclipse.core.resources.IFile;
  36 import org.eclipse.core.resources.IMarker;
  37 import org.eclipse.core.resources.IProject;
  38 import org.eclipse.core.resources.IResource;
  39 import org.eclipse.core.resources.IResourceChangeEvent;
  40 import org.eclipse.core.resources.IResourceDelta;
  41 import org.eclipse.core.resources.IResourceVisitor;
  42 import org.eclipse.core.resources.IWorkspaceRoot;
  43 import org.eclipse.core.resources.IncrementalProjectBuilder;
  44 import org.eclipse.core.runtime.CoreException;
  45 import org.eclipse.core.runtime.IPath;
  46 import org.eclipse.core.runtime.IProgressMonitor;
  47 import org.eclipse.core.runtime.OperationCanceledException;
  48 public class PHPBuilder extends IncrementalProjectBuilder {
  49   IProject currentProject;
  50   JavaProject javaProject;
  51   IWorkspaceRoot workspaceRoot;
  52   NameEnvironment nameEnvironment;
  53   SimpleLookupTable binaryLocationsPerProject; // maps a project to its binary
  54   // resources (output folders,
  55   // class folders, zip/jar files)
  56   State lastState;
  57   BuildNotifier notifier;
  58   char[][] extraResourceFileFilters;
  59   String[] extraResourceFolderFilters;
  60   public static final String CLASS_EXTENSION = "class"; //$NON-NLS-1$
  61   public static boolean DEBUG = true;
  62   /**
  63    * A list of project names that have been built. This list is used to reset
  64    * the JavaModel.existingExternalFiles cache when a build cycle begins so
  65    * that deleted external jars are discovered.
  66    */
  67   static ArrayList builtProjects = null;
  68   public static IMarker[] getProblemsFor(IResource resource) {
  69     try {
  70       if (resource != null && resource.exists())
  71         return resource.findMarkers(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER,
  72             false, IResource.DEPTH_INFINITE);
  73     } catch (CoreException e) {
  74     } // assume there are no problems
  75     return new IMarker[0];
  76   }
  77   public static IMarker[] getTasksFor(IResource resource) {
  78     try {
  79       if (resource != null && resource.exists())
  80         return resource.findMarkers(IJavaModelMarker.TASK_MARKER, false,
  81             IResource.DEPTH_INFINITE);
  82     } catch (CoreException e) {
  83     } // assume there are no tasks
  84     return new IMarker[0];
  85   }
  86   public static void finishedBuilding(IResourceChangeEvent event) {
  87     BuildNotifier.resetProblemCounters();
  88   }
  89   public static void removeProblemsFor(IResource resource) {
  90     try {
  91       if (resource != null && resource.exists())
  92         resource.deleteMarkers(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER,
  93             false, IResource.DEPTH_INFINITE);
  94     } catch (CoreException e) {
  95     } // assume there were no problems
  96   }
  97   public static void removeTasksFor(IResource resource) {
  98     try {
  99       if (resource != null && resource.exists())
 100         resource.deleteMarkers(IJavaModelMarker.TASK_MARKER, false,
 101             IResource.DEPTH_INFINITE);
 102     } catch (CoreException e) {
 103     } // assume there were no problems
 104   }
 105   public static void removeProblemsAndTasksFor(IResource resource) {
 106     try {
 107       if (resource != null && resource.exists()) {
 108         resource.deleteMarkers(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER,
 109             false, IResource.DEPTH_INFINITE);
 110         resource.deleteMarkers(IJavaModelMarker.TASK_MARKER, false,
 111             IResource.DEPTH_INFINITE);
 112       }
 113     } catch (CoreException e) {
 114     } // assume there were no problems
 115   }
 116   public static State readState(IProject project, DataInputStream in)
 117       throws IOException {
 118     return State.read(project, in);
 119   }
 120   public static void writeState(Object state, DataOutputStream out)
 121       throws IOException {
 122     ((State) state).write(out);
 123   }
 124   public PHPBuilder() {
 125   }
 126   protected IProject[] build(int kind, Map ignored, IProgressMonitor monitor)
 127       throws CoreException {
 128     this.currentProject = getProject();
 129     if (currentProject == null || !currentProject.isAccessible())
 130       return new IProject[0];
 131     if (DEBUG)
 132       System.out.println("\nStarting build of " + currentProject.getName() //$NON-NLS-1$
 133           + " @ " + new Date(System.currentTimeMillis())); //$NON-NLS-1$
 134     this.notifier = new BuildNotifier(monitor, currentProject);
 135     notifier.begin();
 136     boolean ok = false;
 137     try {
 138       notifier.checkCancel();
 139       initializeBuilder();
 140       if (isWorthBuilding()) {
 141         if (kind == FULL_BUILD) {
 142           processFullPHPIndex(currentProject, monitor);
 143           buildAll();
 144         } else {
 145           if ((this.lastState = getLastState(currentProject)) == null) {
 146             if (DEBUG)
 147               System.out
 148                   .println("Performing full build since last saved state was not found"); //$NON-NLS-1$
 149             processFullPHPIndex(currentProject, monitor);
 150             buildAll();
 151 //          } else if (hasClasspathChanged()) {
 152 //            // if the output location changes, do not delete the binary files
 153 //            // from old location
 154 //            // the user may be trying something
 155 //            buildAll();
 156           } else if (nameEnvironment.sourceLocations.length > 0) {
 157             // if there is no source to compile & no classpath changes then we
 158             // are done
 159             SimpleLookupTable deltas = findDeltas();
 160             if (deltas == null)
 161               buildAll();
 162             else if (deltas.elementSize > 0)
 163               buildDeltas(deltas);
 164             else if (DEBUG)
 165               System.out.println("Nothing to build since deltas were empty"); //$NON-NLS-1$
 166           } else {
 167             if (hasStructuralDelta()) { // double check that a jar file didn't
 168               // get replaced in a binary project
 169               processFullPHPIndex(currentProject, monitor);
 170               buildAll();
 171             } else {
 172               if (DEBUG)
 173                 System.out
 174                     .println("Nothing to build since there are no source folders and no deltas"); //$NON-NLS-1$
 175               lastState.tagAsNoopBuild();
 176             }
 177           }
 178         }
 179         ok = true;
 180       }
 181     } catch (CoreException e) {
 182       Util.log(e, "JavaBuilder handling CoreException"); //$NON-NLS-1$
 183       IMarker marker = currentProject
 184           .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 185       marker.setAttribute(IMarker.MESSAGE, Util.bind(
 186           "build.inconsistentProject", e.getLocalizedMessage())); //$NON-NLS-1$
 187       marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 188     } catch (ImageBuilderInternalException e) {
 189       Util.log(e.getThrowable(),
 190           "JavaBuilder handling ImageBuilderInternalException"); //$NON-NLS-1$
 191       IMarker marker = currentProject
 192           .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 193       marker.setAttribute(IMarker.MESSAGE, Util.bind(
 194           "build.inconsistentProject", e.coreException.getLocalizedMessage())); //$NON-NLS-1$
 195       marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 196     } catch (MissingClassFileException e) {
 197       // do not log this exception since its thrown to handle aborted compiles
 198       // because of missing class files
 199       if (DEBUG)
 200         System.out.println(Util.bind("build.incompleteClassPath",
 201             e.missingClassFile)); //$NON-NLS-1$
 202       IMarker marker = currentProject
 203           .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 204       marker.setAttribute(IMarker.MESSAGE, Util.bind(
 205           "build.incompleteClassPath", e.missingClassFile)); //$NON-NLS-1$
 206       marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 207     } catch (MissingSourceFileException e) {
 208       // do not log this exception since its thrown to handle aborted compiles
 209       // because of missing source files
 210       if (DEBUG)
 211         System.out.println(Util.bind("build.missingSourceFile",
 212             e.missingSourceFile)); //$NON-NLS-1$
 213       removeProblemsAndTasksFor(currentProject); // make this the only problem
 214       // for this project
 215       IMarker marker = currentProject
 216           .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 217       marker.setAttribute(IMarker.MESSAGE, Util.bind("build.missingSourceFile",
 218           e.missingSourceFile)); //$NON-NLS-1$
 219       marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 220     } finally {
 221       if (!ok)
 222         // If the build failed, clear the previously built state, forcing a
 223         // full build next time.
 224         clearLastState();
 225       notifier.done();
 226       cleanup();
 227     }
 228     IProject[] requiredProjects = getRequiredProjects(true);
 229     if (DEBUG)
 230       System.out.println("Finished build of " + currentProject.getName() //$NON-NLS-1$
 231           + " @ " + new Date(System.currentTimeMillis())); //$NON-NLS-1$
 232     return requiredProjects;
 233   }
 234   /**
 235    * Performs a <code>FULL_BUILD</code> by visiting all nodes in the resource
 236    * tree under the specified project.
 237    *
 238    * @param iProject
 239    */
 240   private void processFullPHPIndex(final IProject iProject,
 241       final IProgressMonitor monitor) {
 242     final IdentifierIndexManager indexManager = PHPeclipsePlugin.getDefault()
 243         .getIndexManager(iProject);
 244     // Create resource visitor logic
 245     IResourceVisitor myVisitor = new IResourceVisitor() {
 246       public boolean visit(IResource resource) throws CoreException {
 247         if (resource.getType() == IResource.FILE) {
 248           if (monitor.isCanceled()) {
 249             throw new OperationCanceledException();
 250           }
 251           if ((resource.getFileExtension() != null)
 252               && PHPFileUtil.isPHPFile((IFile) resource)) {
 253             monitor.worked(1);
 254             monitor.subTask("Parsing: " + resource.getFullPath());
 255             // update indexfile for the project:
 256 //            PHPProject nature = (PHPProject) iProject
 257 //                .getNature(PHPeclipsePlugin.PHP_NATURE_ID);
 258             indexManager.addFile((IFile) resource);
 259           }
 260         }
 261         return true;
 262       }
 263     };
 264     // Process the project using the visitor just created
 265     try {
 266       //      if (iProject.hasNature(PHPeclipsePlugin.PHP_NATURE_ID)) {
 267       //        thePHPProject = new PHPProject();
 268       //        thePHPProject.setProject(iProject);
 269       //      }
 270       indexManager.initialize();
 271       iProject.accept(myVisitor);
 272       indexManager.writeFile();
 273     } catch (CoreException e) {
 274       e.printStackTrace();
 275     }
 276   }
 277   private void buildAll() {
 278     notifier.checkCancel();
 279     notifier.subTask(Util.bind("build.preparingBuild")); //$NON-NLS-1$
 280     if (DEBUG && lastState != null)
 281       System.out.println("Clearing last state : " + lastState); //$NON-NLS-1$
 282     clearLastState();
 283     BatchImageBuilder imageBuilder = new BatchImageBuilder(this);
 284     imageBuilder.build();
 285     recordNewState(imageBuilder.newState);
 286   }
 287   private void buildDeltas(SimpleLookupTable deltas) {
 288     notifier.checkCancel();
 289     notifier.subTask(Util.bind("build.preparingBuild")); //$NON-NLS-1$
 290     if (DEBUG && lastState != null)
 291       System.out.println("Clearing last state : " + lastState); //$NON-NLS-1$
 292     clearLastState(); // clear the previously built state so if the build
 293     // fails, a full build will occur next time
 294     IncrementalImageBuilder imageBuilder = new IncrementalImageBuilder(this);
 295     if (imageBuilder.build(deltas))
 296       recordNewState(imageBuilder.newState);
 297     else {
 298       processFullPHPIndex(currentProject, notifier.monitor);
 299       buildAll();
 300     }
 301   }
 302   private void cleanup() {
 303     this.nameEnvironment = null;
 304     this.binaryLocationsPerProject = null;
 305     this.lastState = null;
 306     this.notifier = null;
 307     this.extraResourceFileFilters = null;
 308     this.extraResourceFolderFilters = null;
 309   }
 310   private void clearLastState() {
 311     JavaModelManager.getJavaModelManager().setLastBuiltState(currentProject,
 312         null);
 313   }
 314   boolean filterExtraResource(IResource resource) {
 315     if (extraResourceFileFilters != null) {
 316       char[] name = resource.getName().toCharArray();
 317       for (int i = 0, l = extraResourceFileFilters.length; i < l; i++)
 318         if (CharOperation.match(extraResourceFileFilters[i], name, true))
 319           return true;
 320     }
 321     if (extraResourceFolderFilters != null) {
 322       IPath path = resource.getProjectRelativePath();
 323       String pathName = path.toString();
 324       int count = path.segmentCount();
 325       if (resource.getType() == IResource.FILE)
 326         count--;
 327       for (int i = 0, l = extraResourceFolderFilters.length; i < l; i++)
 328         if (pathName.indexOf(extraResourceFolderFilters[i]) != -1)
 329           for (int j = 0; j < count; j++)
 330             if (extraResourceFolderFilters[i].equals(path.segment(j)))
 331               return true;
 332     }
 333     return false;
 334   }
 335   private SimpleLookupTable findDeltas() {
 336     notifier.subTask(Util.bind("build.readingDelta", currentProject.getName())); //$NON-NLS-1$
 337     IResourceDelta delta = getDelta(currentProject);
 338     SimpleLookupTable deltas = new SimpleLookupTable(3);
 339     if (delta != null) {
 340       if (delta.getKind() != IResourceDelta.NO_CHANGE) {
 341         if (DEBUG)
 342           System.out.println("Found source delta for: "
 343               + currentProject.getName()); //$NON-NLS-1$
 344         deltas.put(currentProject, delta);
 345       }
 346     } else {
 347       if (DEBUG)
 348         System.out.println("Missing delta for: " + currentProject.getName()); //$NON-NLS-1$
 349       notifier.subTask(""); //$NON-NLS-1$
 350       return null;
 351     }
 352     Object[] keyTable = binaryLocationsPerProject.keyTable;
 353     Object[] valueTable = binaryLocationsPerProject.valueTable;
 354     nextProject : for (int i = 0, l = keyTable.length; i < l; i++) {
 355       IProject p = (IProject) keyTable[i];
 356       if (p != null && p != currentProject) {
 357         State s = getLastState(p);
 358         if (!lastState.wasStructurallyChanged(p, s)) { // see if we can skip
 359           // its delta
 360           if (s.wasNoopBuild())
 361             continue nextProject; // project has no source folders and can be
 362           // skipped
 363           //                            ClasspathLocation[] classFoldersAndJars = (ClasspathLocation[])
 364           // valueTable[i];
 365           boolean canSkip = true;
 366           //                            for (int j = 0, m = classFoldersAndJars.length; j < m; j++) {
 367           //                                    if (classFoldersAndJars[j].isOutputFolder())
 368           //                                            classFoldersAndJars[j] = null; // can ignore output folder since
 369           // project was not structurally changed
 370           //                                    else
 371           //                                            canSkip = false;
 372           //                            }
 373           if (canSkip)
 374             continue nextProject; // project has no structural changes in its
 375           // output folders
 376         }
 377         notifier.subTask(Util.bind("build.readingDelta", p.getName())); //$NON-NLS-1$
 378         delta = getDelta(p);
 379         if (delta != null) {
 380           if (delta.getKind() != IResourceDelta.NO_CHANGE) {
 381             if (DEBUG)
 382               System.out.println("Found binary delta for: " + p.getName()); //$NON-NLS-1$
 383             deltas.put(p, delta);
 384           }
 385         } else {
 386           if (DEBUG)
 387             System.out.println("Missing delta for: " + p.getName()); //$NON-NLS-1$
 388           notifier.subTask(""); //$NON-NLS-1$
 389           return null;
 390         }
 391       }
 392     }
 393     notifier.subTask(""); //$NON-NLS-1$
 394     return deltas;
 395   }
 396   private State getLastState(IProject project) {
 397     return (State) JavaModelManager.getJavaModelManager().getLastBuiltState(
 398         project, notifier.monitor);
 399   }
 400   /*
 401    * Return the list of projects for which it requires a resource delta. This
 402    * builder's project is implicitly included and need not be specified.
 403    * Builders must re-specify the list of interesting projects every time they
 404    * are run as this is not carried forward beyond the next build. Missing
 405    * projects should be specified but will be ignored until they are added to
 406    * the workspace.
 407    */
 408   private IProject[] getRequiredProjects(boolean includeBinaryPrerequisites) {
 409     if (javaProject == null || workspaceRoot == null)
 410       return new IProject[0];
 411     ArrayList projects = new ArrayList();
 412     try {
 413       IClasspathEntry[] entries = javaProject.getExpandedClasspath(true);
 414       for (int i = 0, l = entries.length; i < l; i++) {
 415         IClasspathEntry entry = entries[i];
 416         IPath path = entry.getPath();
 417         IProject p = null;
 418         switch (entry.getEntryKind()) {
 419           case IClasspathEntry.CPE_PROJECT :
 420             p = workspaceRoot.getProject(path.lastSegment()); // missing
 421             // projects are
 422             // considered too
 423             break;
 424           case IClasspathEntry.CPE_LIBRARY :
 425             if (includeBinaryPrerequisites && path.segmentCount() > 1) {
 426               // some binary resources on the class path can come from projects
 427               // that are not included in the project references
 428               IResource resource = workspaceRoot.findMember(path.segment(0));
 429               if (resource instanceof IProject)
 430                 p = (IProject) resource;
 431             }
 432         }
 433         if (p != null && !projects.contains(p))
 434           projects.add(p);
 435       }
 436     } catch (JavaModelException e) {
 437       return new IProject[0];
 438     }
 439     IProject[] result = new IProject[projects.size()];
 440     projects.toArray(result);
 441     return result;
 442   }
 443 //  private boolean hasClasspathChanged() {
 444 //    ClasspathMultiDirectory[] newSourceLocations = nameEnvironment.sourceLocations;
 445 //    ClasspathMultiDirectory[] oldSourceLocations = lastState.sourceLocations;
 446 //    int newLength = newSourceLocations.length;
 447 //    int oldLength = oldSourceLocations.length;
 448 //    int n, o;
 449 //    for (n = o = 0; n < newLength && o < oldLength; n++, o++) {
 450 //      if (newSourceLocations[n].equals(oldSourceLocations[o]))
 451 //        continue; // checks source & output folders
 452 //      try {
 453 //        if (newSourceLocations[n].sourceFolder.members().length == 0) { // added
 454 //          // new
 455 //          // empty
 456 //          // source
 457 //          // folder
 458 //          o--;
 459 //          continue;
 460 //        }
 461 //      } catch (CoreException ignore) {
 462 //      }
 463 //      if (DEBUG)
 464 //        System.out.println(newSourceLocations[n] + " != "
 465 //            + oldSourceLocations[o]); //$NON-NLS-1$
 466 //      return true;
 467 //    }
 468 //    while (n < newLength) {
 469 //      try {
 470 //        if (newSourceLocations[n].sourceFolder.members().length == 0) { // added
 471 //          // new
 472 //          // empty
 473 //          // source
 474 //          // folder
 475 //          n++;
 476 //          continue;
 477 //        }
 478 //      } catch (CoreException ignore) {
 479 //      }
 480 //      if (DEBUG)
 481 //        System.out.println("Added non-empty source folder"); //$NON-NLS-1$
 482 //      return true;
 483 //    }
 484 //    if (o < oldLength) {
 485 //      if (DEBUG)
 486 //        System.out.println("Removed source folder"); //$NON-NLS-1$
 487 //      return true;
 488 //    }
 489 //    //        ClasspathLocation[] newBinaryLocations =
 490 //    // nameEnvironment.binaryLocations;
 491 //    //        ClasspathLocation[] oldBinaryLocations = lastState.binaryLocations;
 492 //    //        newLength = newBinaryLocations.length;
 493 //    //        oldLength = oldBinaryLocations.length;
 494 //    //        for (n = o = 0; n < newLength && o < oldLength; n++, o++) {
 495 //    //                if (newBinaryLocations[n].equals(oldBinaryLocations[o])) continue;
 496 //    //                if (DEBUG)
 497 //    //                        System.out.println(newBinaryLocations[n] + " != " +
 498 //    // oldBinaryLocations[o]); //$NON-NLS-1$
 499 //    //                return true;
 500 //    //        }
 501 //    //        if (n < newLength || o < oldLength) {
 502 //    //                if (DEBUG)
 503 //    //                        System.out.println("Number of binary folders/jar files has changed");
 504 //    // //$NON-NLS-1$
 505 //    //                return true;
 506 //    //        }
 507 //    return false;
 508 //  }
 509   private boolean hasStructuralDelta() {
 510     // handle case when currentProject has only .class file folders and/or jar
 511     // files... no source/output folders
 512     IResourceDelta delta = getDelta(currentProject);
 513     if (delta != null && delta.getKind() != IResourceDelta.NO_CHANGE) {
 514       //                ClasspathLocation[] classFoldersAndJars = (ClasspathLocation[])
 515       // binaryLocationsPerProject.get(currentProject);
 516       //                if (classFoldersAndJars != null) {
 517       //                        for (int i = 0, l = classFoldersAndJars.length; i < l; i++) {
 518       //                                ClasspathLocation classFolderOrJar = classFoldersAndJars[i]; // either
 519       // a .class file folder or a zip/jar file
 520       //                                if (classFolderOrJar != null) {
 521       //                                        IPath p = classFolderOrJar.getProjectRelativePath();
 522       //                                        if (p != null) {
 523       //                                                IResourceDelta binaryDelta = delta.findMember(p);
 524       //                                                if (binaryDelta != null && binaryDelta.getKind() !=
 525       // IResourceDelta.NO_CHANGE)
 526       //                                                        return true;
 527       //                                        }
 528       //                                }
 529       //                        }
 530       //                }
 531     }
 532     return false;
 533   }
 534   private void initializeBuilder() throws CoreException {
 535     this.javaProject = (JavaProject) JavaCore.create(currentProject);
 536     this.workspaceRoot = currentProject.getWorkspace().getRoot();
 537     // Flush the existing external files cache if this is the beginning of a
 538     // build cycle
 539     String projectName = currentProject.getName();
 540     if (builtProjects == null || builtProjects.contains(projectName)) {
 541       JavaModel.flushExternalFileCache();
 542       builtProjects = new ArrayList();
 543     }
 544     builtProjects.add(projectName);
 545     this.binaryLocationsPerProject = new SimpleLookupTable(3);
 546     this.nameEnvironment = new NameEnvironment(workspaceRoot, javaProject,
 547         binaryLocationsPerProject);
 548     String filterSequence = javaProject.getOption(
 549         JavaCore.CORE_JAVA_BUILD_RESOURCE_COPY_FILTER, true);
 550     char[][] filters = filterSequence != null && filterSequence.length() > 0
 551         ? CharOperation.splitAndTrimOn(',', filterSequence.toCharArray())
 552         : null;
 553     if (filters == null) {
 554       this.extraResourceFileFilters = null;
 555       this.extraResourceFolderFilters = null;
 556     } else {
 557       int fileCount = 0, folderCount = 0;
 558       for (int i = 0, l = filters.length; i < l; i++) {
 559         char[] f = filters[i];
 560         if (f.length == 0)
 561           continue;
 562         if (f[f.length - 1] == '/')
 563           folderCount++;
 564         else
 565           fileCount++;
 566       }
 567       this.extraResourceFileFilters = new char[fileCount][];
 568       this.extraResourceFolderFilters = new String[folderCount];
 569       for (int i = 0, l = filters.length; i < l; i++) {
 570         char[] f = filters[i];
 571         if (f.length == 0)
 572           continue;
 573         if (f[f.length - 1] == '/')
 574           extraResourceFolderFilters[--folderCount] = new String(CharOperation
 575               .subarray(f, 0, f.length - 1));
 576         else
 577           extraResourceFileFilters[--fileCount] = f;
 578       }
 579     }
 580   }
 581   private boolean isClasspathBroken(IClasspathEntry[] classpath, IProject p)
 582       throws CoreException {
 583     if (classpath == JavaProject.INVALID_CLASSPATH) // the .classpath file
 584       // could not be read
 585       return true;
 586     IMarker[] markers = p.findMarkers(
 587         IJavaModelMarker.BUILDPATH_PROBLEM_MARKER, false, IResource.DEPTH_ZERO);
 588     for (int i = 0, l = markers.length; i < l; i++)
 589       if (((Integer) markers[i].getAttribute(IMarker.SEVERITY)).intValue() == IMarker.SEVERITY_ERROR)
 590         return true;
 591     return false;
 592   }
 593   private boolean isWorthBuilding() throws CoreException {
 594     boolean abortBuilds = JavaCore.ABORT.equals(javaProject.getOption(
 595         JavaCore.CORE_JAVA_BUILD_INVALID_CLASSPATH, true));
 596     if (!abortBuilds)
 597       return true;
 598     // Abort build only if there are classpath errors
 599     //    if (isClasspathBroken(javaProject.getRawClasspath(), currentProject)) {
 600     //      if (DEBUG)
 601     //        System.out.println("Aborted build because project has classpath errors
 602     // (incomplete or involved in cycle)"); //$NON-NLS-1$
 603     //
 604     //      JavaModelManager.getJavaModelManager().deltaProcessor.addForRefresh(javaProject);
 605     //
 606     //      removeProblemsAndTasksFor(currentProject); // remove all compilation
 607     // problems
 608     //
 609     //      IMarker marker =
 610     // currentProject.createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 611     //      marker.setAttribute(IMarker.MESSAGE,
 612     // Util.bind("build.abortDueToClasspathProblems")); //$NON-NLS-1$
 613     //      marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 614     //      return false;
 615     //    }
 616     // make sure all prereq projects have valid build states... only when
 617     // aborting builds since projects in cycles do not have build states
 618     // except for projects involved in a 'warning' cycle (see below)
 619     IProject[] requiredProjects = getRequiredProjects(false);
 620     next : for (int i = 0, l = requiredProjects.length; i < l; i++) {
 621       IProject p = requiredProjects[i];
 622       if (getLastState(p) == null) {
 623         // The prereq project has no build state: if this prereq project has a
 624         // 'warning' cycle marker then allow build (see bug id 23357)
 625         JavaProject prereq = (JavaProject) JavaCore.create(p);
 626         if (prereq.hasCycleMarker()
 627             && JavaCore.WARNING.equals(javaProject.getOption(
 628                 JavaCore.CORE_CIRCULAR_CLASSPATH, true)))
 629           continue;
 630         if (DEBUG)
 631           System.out.println("Aborted build because prereq project "
 632               + p.getName() //$NON-NLS-1$
 633               + " was not built"); //$NON-NLS-1$
 634         removeProblemsAndTasksFor(currentProject); // make this the only
 635         // problem for this project
 636         IMarker marker = currentProject
 637             .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 638         marker.setAttribute(IMarker.MESSAGE, isClasspathBroken(prereq
 639             .getRawClasspath(), p) ? Util.bind(
 640             "build.prereqProjectHasClasspathProblems", p.getName()) //$NON-NLS-1$
 641             : Util.bind("build.prereqProjectMustBeRebuilt", p.getName())); //$NON-NLS-1$
 642         marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 643         return false;
 644       }
 645     }
 646     return true;
 647   }
 648   /*
 649    * Instruct the build manager that this project is involved in a cycle and
 650    * needs to propagate structural changes to the other projects in the cycle.
 651    */
 652   void mustPropagateStructuralChanges() {
 653     HashSet cycleParticipants = new HashSet(3);
 654     javaProject.updateCycleParticipants(null, new ArrayList(),
 655         cycleParticipants, workspaceRoot, new HashSet(3));
 656     IPath currentPath = javaProject.getPath();
 657     Iterator i = cycleParticipants.iterator();
 658     while (i.hasNext()) {
 659       IPath participantPath = (IPath) i.next();
 660       if (participantPath != currentPath) {
 661         IProject project = this.workspaceRoot.getProject(participantPath
 662             .segment(0));
 663         if (hasBeenBuilt(project)) {
 664           if (DEBUG)
 665             System.out
 666                 .println("Requesting another build iteration since cycle participant "
 667                     + project.getName() //$NON-NLS-1$
 668                     + " has not yet seen some structural changes"); //$NON-NLS-1$
 669           needRebuild();
 670           return;
 671         }
 672       }
 673     }
 674   }
 675   private void recordNewState(State state) {
 676     Object[] keyTable = binaryLocationsPerProject.keyTable;
 677     for (int i = 0, l = keyTable.length; i < l; i++) {
 678       IProject prereqProject = (IProject) keyTable[i];
 679       if (prereqProject != null && prereqProject != currentProject)
 680         state.recordStructuralDependency(prereqProject,
 681             getLastState(prereqProject));
 682     }
 683     if (DEBUG)
 684       System.out.println("Recording new state : " + state); //$NON-NLS-1$
 685     // state.dump();
 686     JavaModelManager.getJavaModelManager().setLastBuiltState(currentProject,
 687         state);
 688   }
 689   /**
 690    * String representation for debugging purposes
 691    */
 692   public String toString() {
 693     return currentProject == null ? "JavaBuilder for unknown project" //$NON-NLS-1$
 694         : "JavaBuilder for " + currentProject.getName(); //$NON-NLS-1$
 695   }
 696 }