boolean filterExtraResource(IResource resource) {
   if (this.extraResourceFileFilters != null) {
     char[] name = resource.getName().toCharArray();
     for (int i = 0, l = this.extraResourceFileFilters.length; i < l; i++)
       if (CharOperation.match(this.extraResourceFileFilters[i], name, true)) return true;
   }
   if (this.extraResourceFolderFilters != null) {
     IPath path = resource.getProjectRelativePath();
     String pathName = path.toString();
     int count = path.segmentCount();
     if (resource.getType() == IResource.FILE) count--;
     for (int i = 0, l = this.extraResourceFolderFilters.length; i < l; i++)
       if (pathName.indexOf(this.extraResourceFolderFilters[i]) != -1)
         for (int j = 0; j < count; j++)
           if (this.extraResourceFolderFilters[i].equals(path.segment(j))) return true;
   }
   return false;
 }
  /* Return the list of projects for which it requires a resource delta. This builder's project
   * is implicitly included and need not be specified. Builders must re-specify the list
   * of interesting projects every time they are run as this is not carried forward
   * beyond the next build. Missing projects should be specified but will be ignored until
   * they are added to the workspace.
   */
  private IProject[] getRequiredProjects(boolean includeBinaryPrerequisites) {
    if (this.javaProject == null || this.workspaceRoot == null) return new IProject[0];

    ArrayList projects = new ArrayList();
    ExternalFoldersManager externalFoldersManager = JavaModelManager.getExternalManager();
    try {
      IClasspathEntry[] entries = this.javaProject.getExpandedClasspath();
      for (int i = 0, l = entries.length; i < l; i++) {
        IClasspathEntry entry = entries[i];
        IPath path = entry.getPath();
        IProject p = null;
        switch (entry.getEntryKind()) {
          case IClasspathEntry.CPE_PROJECT:
            p =
                this.workspaceRoot.getProject(
                    path.lastSegment()); // missing projects are considered too
            if (((ClasspathEntry) entry).isOptional()
                && !JavaProject.hasJavaNature(p)) // except if entry is optional
            p = null;
            break;
          case IClasspathEntry.CPE_LIBRARY:
            if (includeBinaryPrerequisites && path.segmentCount() > 0) {
              // some binary resources on the class path can come from projects that are not
              // included in the project references
              IResource resource = this.workspaceRoot.findMember(path.segment(0));
              if (resource instanceof IProject) {
                p = (IProject) resource;
              } else {
                resource = externalFoldersManager.getFolder(path);
                if (resource != null) p = resource.getProject();
              }
            }
        }
        if (p != null && !projects.contains(p)) projects.add(p);
      }
    } catch (JavaModelException e) {
      return new IProject[0];
    }
    IProject[] result = new IProject[projects.size()];
    projects.toArray(result);
    return result;
  }