@Override
 public void startup(IProgressMonitor monitor) {
   job = new CharsetManagerJob();
   resourceChangeListener = new ResourceChangeListener();
   workspace.addResourceChangeListener(resourceChangeListener, IResourceChangeEvent.POST_CHANGE);
   charsetListener = new CharsetDeltaJob(workspace);
   charsetListener.startup();
 }
  /**
   * Returns the charset explicitly set by the user for the given resource, or <code>null</code>. If
   * no setting exists for the given resource and <code>recurse</code> is <code>true</code>, every
   * parent up to the workspace root will be checked until a charset setting can be found.
   *
   * @param resourcePath the path for the resource
   * @param recurse whether the parent should be queried
   * @return the charset setting for the given resource
   */
  public String getCharsetFor(IPath resourcePath, boolean recurse) {
    Assert.isLegal(resourcePath.segmentCount() >= 1);
    IProject project = workspace.getRoot().getProject(resourcePath.segment(0));

    Preferences prefs = getPreferences(project, false, false);
    Preferences derivedPrefs = getPreferences(project, false, true);

    if (prefs == null && derivedPrefs == null)
      // no preferences found - for performance reasons, short-circuit
      // lookup by falling back to workspace's default setting
      return recurse ? ResourcesPlugin.getEncoding() : null;

    return internalGetCharsetFor(prefs, derivedPrefs, resourcePath, recurse);
  }
 public void setCharsetFor(IPath resourcePath, String newCharset) throws CoreException {
   // for the workspace root we just set a preference in the instance scope
   if (resourcePath.segmentCount() == 0) {
     IEclipsePreferences resourcesPreferences =
         InstanceScope.INSTANCE.getNode(ResourcesPlugin.PI_RESOURCES);
     if (newCharset != null) resourcesPreferences.put(ResourcesPlugin.PREF_ENCODING, newCharset);
     else resourcesPreferences.remove(ResourcesPlugin.PREF_ENCODING);
     try {
       resourcesPreferences.flush();
     } catch (BackingStoreException e) {
       IProject project = workspace.getRoot().getProject(resourcePath.segment(0));
       String message = Messages.resources_savingEncoding;
       throw new ResourceException(
           IResourceStatus.FAILED_SETTING_CHARSET, project.getFullPath(), message, e);
     }
     return;
   }
   // for all other cases, we set a property in the corresponding project
   IResource resource = workspace.getRoot().findMember(resourcePath);
   if (resource != null) {
     try {
       // disable the listener so we don't react to changes made by ourselves
       Preferences encodingSettings =
           getPreferences(
               resource.getProject(), true, resource.isDerived(IResource.CHECK_ANCESTORS));
       if (newCharset == null || newCharset.trim().length() == 0)
         encodingSettings.remove(getKeyFor(resourcePath));
       else encodingSettings.put(getKeyFor(resourcePath), newCharset);
       flushPreferences(encodingSettings, true);
     } catch (BackingStoreException e) {
       IProject project = workspace.getRoot().getProject(resourcePath.segment(0));
       String message = Messages.resources_savingEncoding;
       throw new ResourceException(
           IResourceStatus.FAILED_SETTING_CHARSET, project.getFullPath(), message, e);
     }
   }
 }
 @Override
 public void shutdown(IProgressMonitor monitor) {
   workspace.removeResourceChangeListener(resourceChangeListener);
   if (charsetListener != null) charsetListener.shutdown();
 }