Examples of org.eclipse.core.runtime.IExtensionRegistry

org.eclipse.core.runtime.IExtensionRegistry
The extension registry holds the master list of all discovered namespaces, extension points and extensions.
The extension registry can be queried, by name, for extension points and extensions.

The various objects that describe the contents of the extension registry ( {@link IExtensionPoint}, {@link IExtension}, and {@link IConfigurationElement}) 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 on these object except isValid() will throw {@link org.eclipse.core.runtime.InvalidRegistryObjectException}. Code in a plug-in that has declared that it is not dynamic aware (or not declared anything) can 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 accesses extension registry objects, because it's at risk if plug-in are removed. Similarly, tools that analyze or display the extension registry are vulnerable. Client code can pre-test for invalid objects by calling isValid(), which never throws this exception. However, pre-tests are usually not sufficient because of the possibility of the extension registry 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.

Extensions and extension points are declared by generic entities called namespaces. The only fact known about namespaces is that they have unique string-based identifiers. One example of a namespace is a plug-in, for which the namespace id is the plug-in id.
This interface can be used without OSGi running.
This interface is not intended to be implemented by clients.
@since 3.0

    }
    
    private InputStream findGlobalResource(String resourceName) {
        try {
            // Look if someone implemented an extension point to retrive the platform
            IExtensionRegistry reg = org.eclipse.core.runtime.Platform.getExtensionRegistry();
            if (reg != null) {
                IConfigurationElement[] elt = reg.getConfigurationElementsFor("com.ibm.commons.GlobalResourceFactory"); // $NON-NLS-1$
                for( int i=0; i<elt.length; i++ ) {
                    if( "globalResourceFactory".equalsIgnoreCase(elt[i].getName()) ) { // $NON-NLS-1$
                        try {
                            Object o = elt[i].createExecutableExtension("class"); // $NON-NLS-1$
                            IGlobalResourceProvider factory = (IGlobalResourceProvider)o;

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    }


    private IPlatformService findService(String serviceId) {
        try {
            // Look if someone implemented an extension point to retrive the platform
            IExtensionRegistry reg = org.eclipse.core.runtime.Platform.getExtensionRegistry();
            if (reg != null) {
                IConfigurationElement[] elt = reg.getConfigurationElementsFor("com.ibm.commons.ServiceFactory"); // $NON-NLS-1$
                for( int i=0; i<elt.length; i++ ) {
                    if( "serviceFactory".equalsIgnoreCase(elt[i].getName()) ) { // $NON-NLS-1$
                        try {
                            Object o = elt[i].createExecutableExtension("class"); // $NON-NLS-1$
                            IServiceFactory factory = (IServiceFactory)o;

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        if (contributedDetectors != null) {
            return contributedDetectors;
        }
        TreeMap<String, String> set = new TreeMap<String, String>();


        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint point = registry.getExtensionPoint(EXTENSION_POINT_ID);
        if (point == null) {
            return set;
        }
        IExtension[] extensions = point.getExtensions();
        for (IExtension extension : extensions) {

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    }
    return new IWizardPage[]{};
  }


  private static IExtension[] findExtension(String extensionId) {
    IExtensionRegistry registry = Platform.getExtensionRegistry();
    IExtensionPoint extensionPoint = registry
        .getExtensionPoint(extensionId);
    return extensionPoint.getExtensions();
  }

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    }
    providers = tmp;
  }


  private static IExtension[] findExtension(String extensionId) {
    IExtensionRegistry registry = Platform.getExtensionRegistry();
    IExtensionPoint extensionPoint = registry
        .getExtensionPoint(extensionId);
    return extensionPoint.getExtensions();
  }

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        "-Dcom.sun.management.jmxremote.ssl=false");
    return wc;
  }


  private static IExtension[] findExtension(String extensionId) {
    IExtensionRegistry registry = Platform.getExtensionRegistry();
    IExtensionPoint extensionPoint = registry
        .getExtensionPoint(extensionId);
    return extensionPoint.getExtensions();
  }

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   * This method can be called more than once in order to reload from
   * a changed extension registry.
   * </p>
   */
  public void reload() {
    IExtensionRegistry registry= Platform.getExtensionRegistry();
    List elements= new ArrayList(Arrays.asList(registry.getConfigurationElementsFor(TextEditorPlugin.PLUGIN_ID, EXTENSION_POINT)));
    
    List descriptors= new ArrayList();
    Map descriptorMap= new HashMap();
    
    for (Iterator iter= elements.iterator(); iter.hasNext();) {

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   * Returns descriptors for all hyperlink detector extensions.
   *
   * @return an array with the contributed hyperlink detectors
   */
  public static HyperlinkDetectorTargetDescriptor[] getContributedHyperlinkDetectorTargets() {
    IExtensionRegistry registry= Platform.getExtensionRegistry();
    IConfigurationElement[] elements= registry.getConfigurationElementsFor(HYPERLINK_DETECTOR_TARGETS_EXTENSION_POINT);
    HyperlinkDetectorTargetDescriptor[] hyperlinkDetectorDescs= createDescriptors(elements);
    return hyperlinkDetectorDescs;
  }

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   * Returns descriptors for all hyperlink detector extensions.
   *
   * @return an array with the contributed hyperlink detectors
   */
  public static HyperlinkDetectorDescriptor[] getContributedHyperlinkDetectors() {
    IExtensionRegistry registry= Platform.getExtensionRegistry();
    IConfigurationElement[] elements= registry.getConfigurationElementsFor(HYPERLINK_DETECTORS_EXTENSION_POINT);
    HyperlinkDetectorDescriptor[] hyperlinkDetectorDescs= createDescriptors(elements);
    return hyperlinkDetectorDescs;
  }

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   * order to reload from a changed extension registry.
   * </p>
   */
  public synchronized void reloadExtensions() {
    fDefaultDescriptor= null;
    IExtensionRegistry registry= Platform.getExtensionRegistry();
    List list= new ArrayList();


    IConfigurationElement[] elements= registry.getConfigurationElementsFor(TextEditorPlugin.PLUGIN_ID, TextEditorPlugin.REFERENCE_PROVIDER_EXTENSION_POINT);
    for (int i= 0; i < elements.length; i++) {
      ReferenceProviderDescriptor desc= new ReferenceProviderDescriptor(elements[i]);
      if (desc.getId().equals("org.eclipse.ui.internal.editors.quickdiff.LastSaveReferenceProvider")) //$NON-NLS-1$
        fDefaultDescriptor= desc;
      list.add(desc);

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