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.SimpleLookupTable;
  29 import net.sourceforge.phpdt.internal.core.util.Util;
  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     } catch (Exception e) {
 221       e.printStackTrace();
 222     } finally {
 223       if (!ok)
 224         // If the build failed, clear the previously built state, forcing a
 225         // full build next time.
 226         clearLastState();
 227       notifier.done();
 228       cleanup();
 229     }
 230     IProject[] requiredProjects = getRequiredProjects(true);
 231     if (DEBUG)
 232       System.out.println("Finished build of " + currentProject.getName() //$NON-NLS-1$
 233           + " @ " + new Date(System.currentTimeMillis())); //$NON-NLS-1$
 234     return requiredProjects;
 235   }
 236   /**
 237    * Performs a <code>FULL_BUILD</code> by visiting all nodes in the resource
 238    * tree under the specified project.
 239    *
 240    * @param iProject
 241    */
 242   private void processFullPHPIndex(final IProject iProject,
 243       final IProgressMonitor monitor) {
 244     final IdentifierIndexManager indexManager = PHPeclipsePlugin.getDefault()
 245         .getIndexManager(iProject);
 246     // Create resource visitor logic
 247     IResourceVisitor myVisitor = new IResourceVisitor() {
 248       public boolean visit(IResource resource) throws CoreException {
 249         if (resource.getType() == IResource.FILE) {
 250           if (monitor.isCanceled()) {
 251             throw new OperationCanceledException();
 252           }
 253           if ((resource.getFileExtension() != null)
 254               && PHPFileUtil.isPHPFile((IFile) resource)) {
 255             monitor.worked(1);
 256             monitor.subTask("Parsing: " + resource.getFullPath());
 257             // update indexfile for the project:
 258 //            PHPProject nature = (PHPProject) iProject
 259 //                .getNature(PHPeclipsePlugin.PHP_NATURE_ID);
 260             indexManager.addFile((IFile) resource);
 261           }
 262         }
 263         return true;
 264       }
 265     };
 266     // Process the project using the visitor just created
 267     try {
 268       //      if (iProject.hasNature(PHPeclipsePlugin.PHP_NATURE_ID)) {
 269       //        thePHPProject = new PHPProject();
 270       //        thePHPProject.setProject(iProject);
 271       //      }
 272       indexManager.initialize();
 273       iProject.accept(myVisitor);
 274       indexManager.writeFile();
 275     } catch (CoreException e) {
 276       e.printStackTrace();
 277     }
 278   }
 279   private void buildAll() {
 280     notifier.checkCancel();
 281     notifier.subTask(Util.bind("build.preparingBuild")); //$NON-NLS-1$
 282     if (DEBUG && lastState != null)
 283       System.out.println("Clearing last state : " + lastState); //$NON-NLS-1$
 284     clearLastState();
 285     BatchImageBuilder imageBuilder = new BatchImageBuilder(this);
 286     imageBuilder.build();
 287     recordNewState(imageBuilder.newState);
 288   }
 289   private void buildDeltas(SimpleLookupTable deltas) {
 290     notifier.checkCancel();
 291     notifier.subTask(Util.bind("build.preparingBuild")); //$NON-NLS-1$
 292     if (DEBUG && lastState != null)
 293       System.out.println("Clearing last state : " + lastState); //$NON-NLS-1$
 294     clearLastState(); // clear the previously built state so if the build
 295     // fails, a full build will occur next time
 296     IncrementalImageBuilder imageBuilder = new IncrementalImageBuilder(this);
 297     if (imageBuilder.build(deltas))
 298       recordNewState(imageBuilder.newState);
 299     else {
 300       processFullPHPIndex(currentProject, notifier.monitor);
 301       buildAll();
 302     }
 303   }
 304   private void cleanup() {
 305     this.nameEnvironment = null;
 306     this.binaryLocationsPerProject = null;
 307     this.lastState = null;
 308     this.notifier = null;
 309     this.extraResourceFileFilters = null;
 310     this.extraResourceFolderFilters = null;
 311   }
 312   private void clearLastState() {
 313     JavaModelManager.getJavaModelManager().setLastBuiltState(currentProject,
 314         null);
 315   }
 316   boolean filterExtraResource(IResource resource) {
 317     if (extraResourceFileFilters != null) {
 318       char[] name = resource.getName().toCharArray();
 319       for (int i = 0, l = extraResourceFileFilters.length; i < l; i++)
 320         if (CharOperation.match(extraResourceFileFilters[i], name, true))
 321           return true;
 322     }
 323     if (extraResourceFolderFilters != null) {
 324       IPath path = resource.getProjectRelativePath();
 325       String pathName = path.toString();
 326       int count = path.segmentCount();
 327       if (resource.getType() == IResource.FILE)
 328         count--;
 329       for (int i = 0, l = extraResourceFolderFilters.length; i < l; i++)
 330         if (pathName.indexOf(extraResourceFolderFilters[i]) != -1)
 331           for (int j = 0; j < count; j++)
 332             if (extraResourceFolderFilters[i].equals(path.segment(j)))
 333               return true;
 334     }
 335     return false;
 336   }
 337   private SimpleLookupTable findDeltas() {
 338     notifier.subTask(Util.bind("build.readingDelta", currentProject.getName())); //$NON-NLS-1$
 339     IResourceDelta delta = getDelta(currentProject);
 340     SimpleLookupTable deltas = new SimpleLookupTable(3);
 341     if (delta != null) {
 342       if (delta.getKind() != IResourceDelta.NO_CHANGE) {
 343         if (DEBUG)
 344           System.out.println("Found source delta for: "
 345               + currentProject.getName()); //$NON-NLS-1$
 346         deltas.put(currentProject, delta);
 347       }
 348     } else {
 349       if (DEBUG)
 350         System.out.println("Missing delta for: " + currentProject.getName()); //$NON-NLS-1$
 351       notifier.subTask(""); //$NON-NLS-1$
 352       return null;
 353     }
 354     Object[] keyTable = binaryLocationsPerProject.keyTable;
 355     Object[] valueTable = binaryLocationsPerProject.valueTable;
 356     nextProject : for (int i = 0, l = keyTable.length; i < l; i++) {
 357       IProject p = (IProject) keyTable[i];
 358       if (p != null && p != currentProject) {
 359         State s = getLastState(p);
 360         if (!lastState.wasStructurallyChanged(p, s)) { // see if we can skip
 361           // its delta
 362           if (s.wasNoopBuild())
 363             continue nextProject; // project has no source folders and can be
 364           // skipped
 365           //                            ClasspathLocation[] classFoldersAndJars = (ClasspathLocation[])
 366           // valueTable[i];
 367           boolean canSkip = true;
 368           //                            for (int j = 0, m = classFoldersAndJars.length; j < m; j++) {
 369           //                                    if (classFoldersAndJars[j].isOutputFolder())
 370           //                                            classFoldersAndJars[j] = null; // can ignore output folder since
 371           // project was not structurally changed
 372           //                                    else
 373           //                                            canSkip = false;
 374           //                            }
 375           if (canSkip)
 376             continue nextProject; // project has no structural changes in its
 377           // output folders
 378         }
 379         notifier.subTask(Util.bind("build.readingDelta", p.getName())); //$NON-NLS-1$
 380         delta = getDelta(p);
 381         if (delta != null) {
 382           if (delta.getKind() != IResourceDelta.NO_CHANGE) {
 383             if (DEBUG)
 384               System.out.println("Found binary delta for: " + p.getName()); //$NON-NLS-1$
 385             deltas.put(p, delta);
 386           }
 387         } else {
 388           if (DEBUG)
 389             System.out.println("Missing delta for: " + p.getName()); //$NON-NLS-1$
 390           notifier.subTask(""); //$NON-NLS-1$
 391           return null;
 392         }
 393       }
 394     }
 395     notifier.subTask(""); //$NON-NLS-1$
 396     return deltas;
 397   }
 398   private State getLastState(IProject project) {
 399     return (State) JavaModelManager.getJavaModelManager().getLastBuiltState(
 400         project, notifier.monitor);
 401   }
 402   /*
 403    * Return the list of projects for which it requires a resource delta. This
 404    * builder's project is implicitly included and need not be specified.
 405    * Builders must re-specify the list of interesting projects every time they
 406    * are run as this is not carried forward beyond the next build. Missing
 407    * projects should be specified but will be ignored until they are added to
 408    * the workspace.
 409    */
 410   private IProject[] getRequiredProjects(boolean includeBinaryPrerequisites) {
 411     if (javaProject == null || workspaceRoot == null)
 412       return new IProject[0];
 413     ArrayList projects = new ArrayList();
 414     try {
 415       IClasspathEntry[] entries = javaProject.getExpandedClasspath(true);
 416       for (int i = 0, l = entries.length; i < l; i++) {
 417         IClasspathEntry entry = entries[i];
 418         IPath path = entry.getPath();
 419         IProject p = null;
 420         switch (entry.getEntryKind()) {
 421           case IClasspathEntry.CPE_PROJECT :
 422             p = workspaceRoot.getProject(path.lastSegment()); // missing
 423             // projects are
 424             // considered too
 425             break;
 426           case IClasspathEntry.CPE_LIBRARY :
 427             if (includeBinaryPrerequisites && path.segmentCount() > 1) {
 428               // some binary resources on the class path can come from projects
 429               // that are not included in the project references
 430               IResource resource = workspaceRoot.findMember(path.segment(0));
 431               if (resource instanceof IProject)
 432                 p = (IProject) resource;
 433             }
 434         }
 435         if (p != null && !projects.contains(p))
 436           projects.add(p);
 437       }
 438     } catch (JavaModelException e) {
 439       return new IProject[0];
 440     }
 441     IProject[] result = new IProject[projects.size()];
 442     projects.toArray(result);
 443     return result;
 444   }
 445 //  private boolean hasClasspathChanged() {
 446 //    ClasspathMultiDirectory[] newSourceLocations = nameEnvironment.sourceLocations;
 447 //    ClasspathMultiDirectory[] oldSourceLocations = lastState.sourceLocations;
 448 //    int newLength = newSourceLocations.length;
 449 //    int oldLength = oldSourceLocations.length;
 450 //    int n, o;
 451 //    for (n = o = 0; n < newLength && o < oldLength; n++, o++) {
 452 //      if (newSourceLocations[n].equals(oldSourceLocations[o]))
 453 //        continue; // checks source & output folders
 454 //      try {
 455 //        if (newSourceLocations[n].sourceFolder.members().length == 0) { // added
 456 //          // new
 457 //          // empty
 458 //          // source
 459 //          // folder
 460 //          o--;
 461 //          continue;
 462 //        }
 463 //      } catch (CoreException ignore) {
 464 //      }
 465 //      if (DEBUG)
 466 //        System.out.println(newSourceLocations[n] + " != "
 467 //            + oldSourceLocations[o]); //$NON-NLS-1$
 468 //      return true;
 469 //    }
 470 //    while (n < newLength) {
 471 //      try {
 472 //        if (newSourceLocations[n].sourceFolder.members().length == 0) { // added
 473 //          // new
 474 //          // empty
 475 //          // source
 476 //          // folder
 477 //          n++;
 478 //          continue;
 479 //        }
 480 //      } catch (CoreException ignore) {
 481 //      }
 482 //      if (DEBUG)
 483 //        System.out.println("Added non-empty source folder"); //$NON-NLS-1$
 484 //      return true;
 485 //    }
 486 //    if (o < oldLength) {
 487 //      if (DEBUG)
 488 //        System.out.println("Removed source folder"); //$NON-NLS-1$
 489 //      return true;
 490 //    }
 491 //    //        ClasspathLocation[] newBinaryLocations =
 492 //    // nameEnvironment.binaryLocations;
 493 //    //        ClasspathLocation[] oldBinaryLocations = lastState.binaryLocations;
 494 //    //        newLength = newBinaryLocations.length;
 495 //    //        oldLength = oldBinaryLocations.length;
 496 //    //        for (n = o = 0; n < newLength && o < oldLength; n++, o++) {
 497 //    //                if (newBinaryLocations[n].equals(oldBinaryLocations[o])) continue;
 498 //    //                if (DEBUG)
 499 //    //                        System.out.println(newBinaryLocations[n] + " != " +
 500 //    // oldBinaryLocations[o]); //$NON-NLS-1$
 501 //    //                return true;
 502 //    //        }
 503 //    //        if (n < newLength || o < oldLength) {
 504 //    //                if (DEBUG)
 505 //    //                        System.out.println("Number of binary folders/jar files has changed");
 506 //    // //$NON-NLS-1$
 507 //    //                return true;
 508 //    //        }
 509 //    return false;
 510 //  }
 511   private boolean hasStructuralDelta() {
 512     // handle case when currentProject has only .class file folders and/or jar
 513     // files... no source/output folders
 514     IResourceDelta delta = getDelta(currentProject);
 515     if (delta != null && delta.getKind() != IResourceDelta.NO_CHANGE) {
 516       //                ClasspathLocation[] classFoldersAndJars = (ClasspathLocation[])
 517       // binaryLocationsPerProject.get(currentProject);
 518       //                if (classFoldersAndJars != null) {
 519       //                        for (int i = 0, l = classFoldersAndJars.length; i < l; i++) {
 520       //                                ClasspathLocation classFolderOrJar = classFoldersAndJars[i]; // either
 521       // a .class file folder or a zip/jar file
 522       //                                if (classFolderOrJar != null) {
 523       //                                        IPath p = classFolderOrJar.getProjectRelativePath();
 524       //                                        if (p != null) {
 525       //                                                IResourceDelta binaryDelta = delta.findMember(p);
 526       //                                                if (binaryDelta != null && binaryDelta.getKind() !=
 527       // IResourceDelta.NO_CHANGE)
 528       //                                                        return true;
 529       //                                        }
 530       //                                }
 531       //                        }
 532       //                }
 533     }
 534     return false;
 535   }
 536   private void initializeBuilder() throws CoreException {
 537     this.javaProject = (JavaProject) JavaCore.create(currentProject);
 538     this.workspaceRoot = currentProject.getWorkspace().getRoot();
 539     // Flush the existing external files cache if this is the beginning of a
 540     // build cycle
 541     String projectName = currentProject.getName();
 542     if (builtProjects == null || builtProjects.contains(projectName)) {
 543       JavaModel.flushExternalFileCache();
 544       builtProjects = new ArrayList();
 545     }
 546     builtProjects.add(projectName);
 547     this.binaryLocationsPerProject = new SimpleLookupTable(3);
 548     this.nameEnvironment = new NameEnvironment(workspaceRoot, javaProject,
 549         binaryLocationsPerProject);
 550     String filterSequence = javaProject.getOption(
 551         JavaCore.CORE_JAVA_BUILD_RESOURCE_COPY_FILTER, true);
 552     char[][] filters = filterSequence != null && filterSequence.length() > 0
 553         ? CharOperation.splitAndTrimOn(',', filterSequence.toCharArray())
 554         : null;
 555     if (filters == null) {
 556       this.extraResourceFileFilters = null;
 557       this.extraResourceFolderFilters = null;
 558     } else {
 559       int fileCount = 0, folderCount = 0;
 560       for (int i = 0, l = filters.length; i < l; i++) {
 561         char[] f = filters[i];
 562         if (f.length == 0)
 563           continue;
 564         if (f[f.length - 1] == '/')
 565           folderCount++;
 566         else
 567           fileCount++;
 568       }
 569       this.extraResourceFileFilters = new char[fileCount][];
 570       this.extraResourceFolderFilters = new String[folderCount];
 571       for (int i = 0, l = filters.length; i < l; i++) {
 572         char[] f = filters[i];
 573         if (f.length == 0)
 574           continue;
 575         if (f[f.length - 1] == '/')
 576           extraResourceFolderFilters[--folderCount] = new String(CharOperation
 577               .subarray(f, 0, f.length - 1));
 578         else
 579           extraResourceFileFilters[--fileCount] = f;
 580       }
 581     }
 582   }
 583   private boolean isClasspathBroken(IClasspathEntry[] classpath, IProject p)
 584       throws CoreException {
 585     if (classpath == JavaProject.INVALID_CLASSPATH) // the .classpath file
 586       // could not be read
 587       return true;
 588     IMarker[] markers = p.findMarkers(
 589         IJavaModelMarker.BUILDPATH_PROBLEM_MARKER, false, IResource.DEPTH_ZERO);
 590     for (int i = 0, l = markers.length; i < l; i++)
 591       if (((Integer) markers[i].getAttribute(IMarker.SEVERITY)).intValue() == IMarker.SEVERITY_ERROR)
 592         return true;
 593     return false;
 594   }
 595   private boolean isWorthBuilding() throws CoreException {
 596     boolean abortBuilds = JavaCore.ABORT.equals(javaProject.getOption(
 597         JavaCore.CORE_JAVA_BUILD_INVALID_CLASSPATH, true));
 598     if (!abortBuilds)
 599       return true;
 600     // Abort build only if there are classpath errors
 601     //    if (isClasspathBroken(javaProject.getRawClasspath(), currentProject)) {
 602     //      if (DEBUG)
 603     //        System.out.println("Aborted build because project has classpath errors
 604     // (incomplete or involved in cycle)"); //$NON-NLS-1$
 605     //
 606     //      JavaModelManager.getJavaModelManager().deltaProcessor.addForRefresh(javaProject);
 607     //
 608     //      removeProblemsAndTasksFor(currentProject); // remove all compilation
 609     // problems
 610     //
 611     //      IMarker marker =
 612     // currentProject.createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 613     //      marker.setAttribute(IMarker.MESSAGE,
 614     // Util.bind("build.abortDueToClasspathProblems")); //$NON-NLS-1$
 615     //      marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 616     //      return false;
 617     //    }
 618     // make sure all prereq projects have valid build states... only when
 619     // aborting builds since projects in cycles do not have build states
 620     // except for projects involved in a 'warning' cycle (see below)
 621     IProject[] requiredProjects = getRequiredProjects(false);
 622     next : for (int i = 0, l = requiredProjects.length; i < l; i++) {
 623       IProject p = requiredProjects[i];
 624       if (getLastState(p) == null) {
 625         // The prereq project has no build state: if this prereq project has a
 626         // 'warning' cycle marker then allow build (see bug id 23357)
 627         JavaProject prereq = (JavaProject) JavaCore.create(p);
 628         if (prereq.hasCycleMarker()
 629             && JavaCore.WARNING.equals(javaProject.getOption(
 630                 JavaCore.CORE_CIRCULAR_CLASSPATH, true)))
 631           continue;
 632         if (DEBUG)
 633           System.out.println("Aborted build because prereq project "
 634               + p.getName() //$NON-NLS-1$
 635               + " was not built"); //$NON-NLS-1$
 636         removeProblemsAndTasksFor(currentProject); // make this the only
 637         // problem for this project
 638         IMarker marker = currentProject
 639             .createMarker(IJavaModelMarker.JAVA_MODEL_PROBLEM_MARKER);
 640         marker.setAttribute(IMarker.MESSAGE, isClasspathBroken(prereq
 641             .getRawClasspath(), p) ? Util.bind(
 642             "build.prereqProjectHasClasspathProblems", p.getName()) //$NON-NLS-1$
 643             : Util.bind("build.prereqProjectMustBeRebuilt", p.getName())); //$NON-NLS-1$
 644         marker.setAttribute(IMarker.SEVERITY, IMarker.SEVERITY_ERROR);
 645         return false;
 646       }
 647     }
 648     return true;
 649   }
 650   /*
 651    * Instruct the build manager that this project is involved in a cycle and
 652    * needs to propagate structural changes to the other projects in the cycle.
 653    */
 654   void mustPropagateStructuralChanges() {
 655     HashSet cycleParticipants = new HashSet(3);
 656     javaProject.updateCycleParticipants(null, new ArrayList(),
 657         cycleParticipants, workspaceRoot, new HashSet(3));
 658     IPath currentPath = javaProject.getPath();
 659     Iterator i = cycleParticipants.iterator();
 660     while (i.hasNext()) {
 661       IPath participantPath = (IPath) i.next();
 662       if (participantPath != currentPath) {
 663         IProject project = this.workspaceRoot.getProject(participantPath
 664             .segment(0));
 665         if (hasBeenBuilt(project)) {
 666           if (DEBUG)
 667             System.out
 668                 .println("Requesting another build iteration since cycle participant "
 669                     + project.getName() //$NON-NLS-1$
 670                     + " has not yet seen some structural changes"); //$NON-NLS-1$
 671           needRebuild();
 672           return;
 673         }
 674       }
 675     }
 676   }
 677   private void recordNewState(State state) {
 678     Object[] keyTable = binaryLocationsPerProject.keyTable;
 679     for (int i = 0, l = keyTable.length; i < l; i++) {
 680       IProject prereqProject = (IProject) keyTable[i];
 681       if (prereqProject != null && prereqProject != currentProject)
 682         state.recordStructuralDependency(prereqProject,
 683             getLastState(prereqProject));
 684     }
 685     if (DEBUG)
 686       System.out.println("Recording new state : " + state); //$NON-NLS-1$
 687     // state.dump();
 688     JavaModelManager.getJavaModelManager().setLastBuiltState(currentProject,
 689         state);
 690   }
 691   /**
 692    * String representation for debugging purposes
 693    */
 694   public String toString() {
 695     return currentProject == null ? "JavaBuilder for unknown project" //$NON-NLS-1$
 696         : "JavaBuilder for " + currentProject.getName(); //$NON-NLS-1$
 697   }
 698 }