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 void loadTypeExporters() {
    IExtensionRegistry reg = Platform.getExtensionRegistry();
    IConfigurationElement elements[] = reg.getConfigurationElementsFor(TYPEEXPORTER_EXTENSION_POINT);


    for (IConfigurationElement element : elements) {
      try {
        IConfigurationElement[] formats = element.getChildren("format"); //$NON-NLS-1$
        for (IConfigurationElement format : formats) {

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        if (runListeners == null) runListeners = computeListeners();
        return runListeners;
    }


    protected List computeListeners() {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(RUN_LISTENER_ID);
        IExtension[] extensions = extensionPoint.getExtensions();
        ArrayList results = new ArrayList();
        for (int i = 0; i < extensions.length; i++) {
            IConfigurationElement[] elements = extensions[i].getConfigurationElements();
            for (int j = 0; j < elements.length; j++) {

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import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;


abstract class StylesheetFactoryImpl {
    Stylesheet[] createStylesheets(Class stylesheetInterface) {
        IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
        IConfigurationElement[] configElements = extensionRegistry
                .getConfigurationElementsFor(stylesheetInterface.getName());
        Stylesheet[] result = (Stylesheet[])java.lang.reflect.Array.newInstance(
                stylesheetInterface, configElements.length);
        for (int i = 0; i < configElements.length; i++) {
            try {

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        String extensionPointID = extensionPointInterface.getName();
        return getExtensions(extensionPointID, extensionPointInterface);
    }
    
    public Object[] getExtensions(String extensionPointID, Class extensionPointInterface) {
        IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
        IConfigurationElement[] configElements = extensionRegistry
                .getConfigurationElementsFor(extensionPointID);
        
        ArrayList extensions = new ArrayList();
        for (int i = 0; i < configElements.length; i++) {
            try {

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     */
    private void initEntryEditorExtensions()
    {
        entryEditorExtensions = new HashMap<String, EntryEditorExtension>();


        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint( BrowserUIConstants.ENTRY_EDITOR_EXTENSION_POINT );
        IConfigurationElement[] members = extensionPoint.getConfigurationElements();


        // For each extension:
        for ( int m = 0; m < members.length; m++ )
        {

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    private static final String EXTENSION_ID_CALLBACK = PLUGIN_ID + ".callback"; //$NON-NLS-1$


    private static final String EXTENSION_ID_APP_STATE_TRACKER = "appStateTracker"; //$NON-NLS-1$


    public static CloudFoundryCallback readExtension() {
      IExtensionRegistry registry = Platform.getExtensionRegistry();
      IExtensionPoint extensionPoint = registry.getExtensionPoint(EXTENSION_ID_CALLBACK);
      IExtension[] extensions = extensionPoint.getExtensions();
      for (IExtension extension : extensions) {
        IConfigurationElement[] elements = extension.getConfigurationElements();
        for (IConfigurationElement element : elements) {
          if (element.getName().compareTo(ELEMENT_CALLBACK) == 0) {

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      // if (Trace.CONFIG) {
      // Trace.trace(Trace.STRING_CONFIG,
      // "->- Loading .appStateTracker extension point ->-");
      // }
      appStateTrackerEntries = new ArrayList<AppStateTrackerEntry>();
      IExtensionRegistry registry = Platform.getExtensionRegistry();
      IConfigurationElement[] cf = registry
          .getConfigurationElementsFor(PLUGIN_ID, EXTENSION_ID_APP_STATE_TRACKER);


      for (IConfigurationElement curConfigElement : cf) {
        // load the extension in a safe environment. If there are NPEs
        // or miss configurations they will be caught by try/catch

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{
    public static List<IRepositoryType> loadRepositoryTypes()
    {
        List<IRepositoryType> repositories = new ArrayList<IRepositoryType>();


        IExtensionRegistry registry = Platform.getExtensionRegistry();


        IExtensionPoint p = registry.getExtensionPoint(SigilCore.REPOSITORY_PROVIDER_EXTENSION_POINT_ID);


        for (IExtension e : p.getExtensions())
        {
            for (IConfigurationElement c : e.getConfigurationElements())
            {

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     * @return
     */
    public static EclipseRepositoryProviderWrapper getProvider(String alias)
    throws CoreException
    {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint p = registry.getExtensionPoint(SigilCore.REPOSITORY_PROVIDER_EXTENSION_POINT_ID);


        for (IExtension e : p.getExtensions())
        {
            for (IConfigurationElement c : e.getConfigurationElements())
            {

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        return findWizardConfig(type.getId()) != null;
    }


    private static IConfigurationElement findWizardConfig(String id)
    {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint p = registry.getExtensionPoint(SigilUI.REPOSITORY_WIZARD_EXTENSION_POINT_ID);


        for (IExtension e : p.getExtensions())
        {
            for (IConfigurationElement c : e.getConfigurationElements())
            {

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