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.


    // Search for extension point to get the possible deprecation message
    Plugin jdtCorePlugin = JavaCore.getPlugin();
    if (jdtCorePlugin == null) return null;


    IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(JavaCore.PLUGIN_ID, JavaModelManager.CPVARIABLE_INITIALIZER_EXTPOINT_ID);
    if (extension != null) {
      IExtension[] extensions =  extension.getExtensions();
      for(int i = 0; i < extensions.length; i++){
        IConfigurationElement [] configElements = extensions[i].getConfigurationElements();
        for(int j = 0; j < configElements.length; j++){
          IConfigurationElement configElement = configElements[j];
          String varAttribute = configElement.getAttribute("variable"); //$NON-NLS-1$

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  public static ClasspathVariableInitializer getClasspathVariableInitializer(String variable){


    Plugin jdtCorePlugin = JavaCore.getPlugin();
    if (jdtCorePlugin == null) return null;


    IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(JavaCore.PLUGIN_ID, JavaModelManager.CPVARIABLE_INITIALIZER_EXTPOINT_ID);
    if (extension != null) {
      IExtension[] extensions =  extension.getExtensions();
      for(int i = 0; i < extensions.length; i++){
        IConfigurationElement [] configElements = extensions[i].getConfigurationElements();
        for(int j = 0; j < configElements.length; j++){
          IConfigurationElement configElement = configElements[j];
          try {

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  public static void registerLnfAdapter(String classname, ILookAndFeelAdapter lnfAdapter) {
    lnfAdapters.put(classname, lnfAdapter);
  }


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

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  public static ILookAndFeelAdapter getLnfAdapter(String lnfClassname) {
    return lnfAdapters.get(lnfClassname);
  }


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

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  public static Sorting getSortingByKey(String id) {
    return propertySortings.get(id);
  }


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

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      }
    }
  }


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

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      }
    }
  }


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

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      }
    }
  }


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

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      }
    }
  }


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

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      }
    }
  }


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

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