Examples of org.eclipse.core.runtime.ListenerList

org.eclipse.core.runtime.ListenerList
This class is a thread safe list that is designed for storing lists of listeners. The implementation is optimized for minimal memory footprint, frequent reads and infrequent writes. Modification of the list is synchronized and relatively expensive, while accessing the listeners is very fast. Readers are given access to the underlying array data structure for reading, with the trust that they will not modify the underlying array.
A listener list handles the same listener being added multiple times, and tolerates removal of listeners that are the same as other listeners in the list. For this purpose, listeners can be compared with each other using either equality or identity, as specified in the list constructor.
Use the getListeners method when notifying listeners. The recommended code sequence for notifying all registered listeners of say, FooListener.eventHappened, is:
```
 Object[] listeners = myListenerList.getListeners(); for (int i = 0; i < listeners.length; ++i) { ((FooListener) listeners[i]).eventHappened(event); } 
```
This class can be used without OSGi running.
@since org.eclipse.equinox.common 3.2


    /**
     * Create a new SimpleSelectionProvider
     */
    public SimpleSelectionProvider() {
        fSelectionChangedListeners = new ListenerList();
    }

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    }


    @Override
    public void addListener(final ILabelProviderListener listener) {
        if (fListeners == null) {
            fListeners = new ListenerList();
        }
        fListeners.add(listener);
        if (fProblemChangedListener == null) {
            fProblemChangedListener = new IProblemChangedListener() {
                @Override

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    public ErlangConsole(final IBackend backend) {
        super(backend.getName(), null, null, true);
        this.backend = backend;


        shell = backend.getShell("main");
        consoleListeners = new ListenerList(ListenerList.IDENTITY);


        partitioner = new ErlangConsolePartitioner();
        getDocument().setDocumentPartitioner(partitioner);
        partitioner.connect(getDocument());
    }

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    }


    private final ListenerList fListeners;


    public ProblemMarkerManager() {
        fListeners = new ListenerList();
    }

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    ErlModel _erlModel = new ErlModel();
    this.erlModel = _erlModel;
    ErlModelCache _erlModelCache = new ErlModelCache();
    HandleManager _handleManager = new HandleManager(_erlModelCache);
    this.handleManager = _handleManager;
    ListenerList _listenerList = new ListenerList();
    this.listenerList = _listenerList;
    IWorkspace _workspace = this.erlModel.getWorkspace();
    _workspace.addResourceChangeListener(this, IResourceChangeEvent.POST_CHANGE);
  }

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    }


    @Override
    public final void addHandlerListener(final IHandlerListener listener) {
        if (listenerList == null) {
            listenerList = new ListenerList(ListenerList.IDENTITY);
        }


        listenerList.add(listener);
    }

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   *            the listener to add
   */
  public void addEditorActivationListener(
      ColumnViewerEditorActivationListener listener) {
    if (editorActivationListener == null) {
      editorActivationListener = new ListenerList();
    }
    editorActivationListener.add(listener);
  }

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        final IPropertyChangeListener listener) {
      Object existing = registeredListeners.get(commandId);
      if (existing instanceof ListenerList) {
        ((ListenerList) existing).add(listener);
      } else if (existing != null) {
        ListenerList listeners = new ListenerList(ListenerList.IDENTITY);
        listeners.add(existing);
        listeners.add(listener);
        registeredListeners.put(commandId, listeners);
      } else {
        registeredListeners.put(commandId, listener);
      }
      if (!bindingManagerListenerAttached) {

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        if (registeredListeners.isEmpty()) {
          bindingManager.removeBindingManagerListener(this);
          bindingManagerListenerAttached = false;
        }
      } else if (existing instanceof ListenerList) {
        ListenerList existingList = (ListenerList) existing;
        existingList.remove(listener);
        if (existingList.size() == 1) {
          registeredListeners.put(commandId, existingList.getListeners()[0]);
        }
      }
    }

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    public PartListenerGroup(ITextEditor editorPart)
    {
      fPart= editorPart;
      fCurrentJob= null;
      fAstListeners= new ListenerList(ListenerList.IDENTITY);
      
      fSelectionListener= new ISelectionChangedListener()
      {
        public void selectionChanged(SelectionChangedEvent event) {
          ISelection selection= event.getSelection();

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