Examples of org.eclipse.core.runtime.IExtensionPoint

org.eclipse.core.runtime.IExtensionPoint
An extension point declared in a plug-in. Except for the list of extensions plugged in to it, the information available for an extension point is obtained from the declaring plug-in's manifest (plugin.xml) file.
These registry objects are intended for relatively short-term use. Clients that deal with these objects must be aware that they may become invalid if the declaring plug-in is updated or uninstalled. If this happens, all methods except {@link #isValid()} will throw {@link InvalidRegistryObjectException}. For extension point objects, the most common case is code in a plug-in dealing with one of the extension points it declares. These extension point objects are guaranteed to be valid while the plug-in is active. Code in a plug-in that has declared that it is not dynamic aware (or not declared anything) can also safely ignore this issue, since the registry would not be modified while it is active. However, code in a plug-in that declares that it is dynamic aware must be careful if it access the extension point object of a different plug-in, because it's at risk if that other plug-in is removed. Similarly, tools that analyze or display the extension registry are vulnerable. Client code can pre-test for invalid objects by calling {@link #isValid()}, which never throws this exception. However, pre-tests are usually not sufficient because of the possibility of the extension point object becoming invalid as a result of a concurrent activity. At-risk clients must treat InvalidRegistryObjectException as if it were a checked exception. Also, such clients should probably register a listener with the extension registry so that they receive notification of any changes to the registry.
This interface can be used without OSGi running.
This interface is not intended to be implemented by clients.

     * @param targetPluginId
     * @param extensionPoint
     */
    public void readRegistry( IExtensionRegistry registry, String targetPluginId,
            String extensionPoint ) {
        IExtensionPoint point = registry.getExtensionPoint(targetPluginId, extensionPoint);
        if (point == null)
            return;
        IExtension[] extensions = point.getExtensions();
        extensions = orderExtensions(extensions);
        for( int i = 0; i < extensions.length; i++ )
            readExtension(extensions[i]);
    }

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    /**
     * Construct <code>ExtensionPointIterator</code>.
     */
    private ExtensionPointList( String xpid ) {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(xpid);
        if (extensionPoint == null)
            return;


        // For each extension ...
        for( IExtension extension : extensionPoint.getExtensions() ) {
            try {
                addAll(Arrays.asList(extension.getConfigurationElements()));
            } catch (Exception e) {
                Bundle bundle = Platform.getBundle(extensionPoint.getNamespaceIdentifier());
                if (bundle == null) {
                    if (CorePlugin.getDefault().isDebugging()) {
                        System.out
                                .println("Could not locate bundle for " + extensionPoint.getUniqueIdentifier()); //$NON-NLS-1$
                    }
                    bundle = CorePlugin.getDefault().getBundle();
                }
                ILog log = Platform.getLog(bundle);
                log.log(new Status(Status.ERROR, extension.getNamespaceIdentifier(), 0,
                        extensionPoint.getUniqueIdentifier() + Messages.ExtensionPointList_problem
                                + e, e));
            }
        }
    }

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     * @param xpid The id of the ExtensionPoint for which the extensions are to be processed
     * @param processor The object that wishes to process the extension for the ExtensionPoint
     */
    public static void process( Plugin plugin, String xpid, ExtensionPointProcessor processor ) {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(xpid);
        if (extensionPoint == null)
            return;
        IExtension[] extensions = extensionPoint.getExtensions();


        // For each extension ...
        for( int i = 0; i < extensions.length; i++ ) {
            IExtension extension = extensions[i];
            IConfigurationElement[] elements = extension.getConfigurationElements();

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     * @param itemCreator Used to process extention points into items for a list
     * @return List
     */
    public static List list( String xpid, ExtensionPointItemCreator itemCreator ) {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(xpid);
        if (extensionPoint == null) {
            return Collections.EMPTY_LIST;
        }
        IExtension[] extensions = extensionPoint.getExtensions();
        List<Object> list = new ArrayList<Object>();
        // For each extension ...
        for( int i = 0; i < extensions.length; i++ ) {
            IExtension extension = extensions[i];
            IConfigurationElement[] elements = extension.getConfigurationElements();

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  public static Class getListenerAdapter(Class list) {
    return listenerAdapters.get(list);
  }


  private static void parseListenerAdapterExtensions() {
    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(LISTENER_ADAPTER_EXTENSION);
    if (extensionPoint != null) {
      IExtension[] extensions = extensionPoint.getExtensions();
      if (extensions != null && extensions.length > 0) {
        for (int i = 0; i < extensions.length; i++) {
          parseListenerAdapterExtension(extensions[i]);
        }
      }

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    fieldParsers = new ArrayList<IFieldParser>();
    parseFieldParsers();
  }


  private void parseFieldParsers() {
    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(FIELD_PARSER_EXTENSION_ID);
    if (extensionPoint != null) {
      IExtension[] extensions = extensionPoint.getExtensions();
      if (extensions != null && extensions.length > 0) {
        for (int i = 0; i < extensions.length; i++) {
          parseFieldParser(extensions[i]);
        }
      }

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    public void remove() {
    }
  }
  private void parseListenerModels() {
    IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(EVENT_LISTENER_MODEL_EXTENSION_ID);
    if (extensionPoint != null) {
      IExtension[] extensions = extensionPoint.getExtensions();
      if (extensions != null && extensions.length > 0) {
        for (int i = 0; i < extensions.length; i++) {
          parseListenerModel(extensions[i]);
        }
      }

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    protected static IDropActionDelegate getPluginAdapter(
            PluginTransferData data) throws CoreException {


        IExtensionRegistry registry = Platform.getExtensionRegistry();
        String adapterName = data.getExtensionId();
        IExtensionPoint xpt = registry.getExtensionPoint(PlatformUI.PLUGIN_ID,
                IWorkbenchRegistryConstants.PL_DROP_ACTIONS);
        IExtension[] extensions = xpt.getExtensions();
        for (int i = 0; i < extensions.length; i++) {
            IConfigurationElement[] configs = extensions[i]
                    .getConfigurationElements();
            if (configs != null && configs.length > 0) {
                String id = configs[0].getAttribute("id");//$NON-NLS-1$

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   */
  public static AbstractSplashHandler findSplashHandlerFor(IProduct product) {
    if (product == null)
      return null;


    IExtensionPoint point = Platform.getExtensionRegistry()
        .getExtensionPoint(PlatformUI.PLUGIN_ID,
            IWorkbenchRegistryConstants.PL_SPLASH_HANDLERS);


    if (point == null)
      return null;


    IExtension[] extensions = point.getExtensions();
    Map idToSplash = new HashMap(); // String->ConfigurationElement
    String[] targetId = new String[1];
    for (int i = 0; i < extensions.length; i++) {
      IConfigurationElement[] children = extensions[i]
          .getConfigurationElements();

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     * @return IElementFactory
     */
    public IElementFactory getElementFactory(String targetID) {


        // Get the extension point registry.
        IExtensionPoint extensionPoint;
        extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(
                PI_WORKBENCH, IWorkbenchRegistryConstants.PL_ELEMENT_FACTORY);


        if (extensionPoint == null) {
            WorkbenchPlugin
                    .log("Unable to find element factory. Extension point: " + IWorkbenchRegistryConstants.PL_ELEMENT_FACTORY + " not found"); //$NON-NLS-2$ //$NON-NLS-1$
            return null;
        }


        // Loop through the config elements.
        IConfigurationElement targetElement = null;
        IConfigurationElement[] configElements = extensionPoint
                .getConfigurationElements();
        for (int j = 0; j < configElements.length; j++) {
            String strID = configElements[j].getAttribute("id"); //$NON-NLS-1$
            if (targetID.equals(strID)) {
                targetElement = configElements[j];

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