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 targetID the target id
     * @return the instantiated extension object, or <code>null</code> if not found
     */
    private Object createExtension(String extensionPointId, String elementName,
            String targetID) {
        IExtensionPoint extensionPoint = Platform.getExtensionRegistry()
                .getExtensionPoint(PI_WORKBENCH, extensionPointId);
        if (extensionPoint == null) {
            WorkbenchPlugin
                    .log("Unable to find extension. Extension point: " + extensionPointId + " not found"); //$NON-NLS-1$ //$NON-NLS-2$
            return null;
        }


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

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    }
    //check the delta to see if there are any viewer contribution changes.  if so, null our builder to cause reparsing on the next menu show
    IExtensionDelta [] deltas = event.getExtensionDeltas();
    for (int i = 0; i < deltas.length; i++) {
      IExtensionDelta delta = deltas[i];
      IExtensionPoint extensionPoint = delta.getExtensionPoint();
      if (extensionPoint.getNamespace().equals(
          WorkbenchPlugin.PI_WORKBENCH)
          && extensionPoint.getSimpleIdentifier().equals(
              IWorkbenchRegistryConstants.PL_POPUP_MENU)) {


        boolean clearPopups = false;
        IConfigurationElement [] elements = delta.getExtension().getConfigurationElements();
        for (int j = 0; j < elements.length; j++) {

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       * 
       * @see java.lang.Runnable#run()
       */
      public void run() {
        // get the help UI extension from the registry
        IExtensionPoint point = Platform.getExtensionRegistry()
            .getExtensionPoint(HELP_SYSTEM_EXTENSION_ID);
        if (point == null) {
          // our extension point is missing (!) - act like there was
          // no help UI
          return;
        }
        IExtension[] extensions = point.getExtensions();
        if (extensions.length == 0) {
          // no help UI present
          return;
        }

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     * Loads the registered JUnit launch configurations
     */
    private void loadLaunchConfigTypeIDs()
    {
        fJUnitLaunchConfigTypeIDs = new ArrayList();
        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(ID_EXTENSION_POINT_JUNIT_LAUNCHCONFIGS);
        if (extensionPoint == null)
        {
            return;
        }
        IConfigurationElement[] configs = extensionPoint.getConfigurationElements();


        for (int i = 0; i < configs.length; i++)
        {
            String configTypeID = configs[i].getAttribute("configTypeID"); //$NON-NLS-1$
            fJUnitLaunchConfigTypeIDs.add(configTypeID);

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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++ )
        {
            EntryEditorExtension bean = new EntryEditorExtension();

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    public static Collection<ValueEditorExtension> getValueEditorExtensions()
    {
        Collection<ValueEditorExtension> valueEditorExtensions = new ArrayList<ValueEditorExtension>();


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


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

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        if ( jndiLoggers == null )
        {
            jndiLoggers = new ArrayList<IJndiLogger>();


            IExtensionRegistry registry = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registry.getExtensionPoint( getPluginProperties().getString(
                "ExtensionPoint_JndiLogger_id" ) ); //$NON-NLS-1$
            IConfigurationElement[] members = extensionPoint.getConfigurationElements();
            for ( IConfigurationElement member : members )
            {
                try
                {
                    IJndiLogger logger = ( IJndiLogger ) member.createExecutableExtension( "class" ); //$NON-NLS-1$

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        if ( connectionListeners == null )
        {
            connectionListeners = new ArrayList<IConnectionListener>();


            IExtensionRegistry registry = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registry.getExtensionPoint( getPluginProperties().getString(
                "ExtensionPoint_ConnectionListener_id" ) ); //$NON-NLS-1$
            IConfigurationElement[] members = extensionPoint.getConfigurationElements();
            for ( IConfigurationElement member : members )
            {
                try
                {
                    IConnectionListener listener = ( IConnectionListener ) member.createExecutableExtension( "class" ); //$NON-NLS-1$

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     *
     * @return true if this plugin runs in IDE environment
     */
    public static boolean isIDEEnvironment()
    {
        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(
            "org.eclipse.ui.perspectives" ); //$NON-NLS-1$
        if ( extensionPoint != null )
        {
            IExtension[] extensions = extensionPoint.getExtensions();
            if ( extensions != null )
            {
                for ( int i = 0; i < extensions.length; i++ )
                {
                    IExtension extension = extensions[i];

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     *
     * @return true if this plugin runs in IDE environment
     */
    public static boolean isIDEEnvironment()
    {
        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(
            "org.eclipse.ui.perspectives" ); //$NON-NLS-1$
        if ( extensionPoint != null )
        {
            IExtension[] extensions = extensionPoint.getExtensions();
            if ( extensions != null )
            {
                for ( int i = 0; i < extensions.length; i++ )
                {
                    IExtension extension = extensions[i];

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