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.

        if ( connectionStore.exists() )
        {
            return; // connections are stored from a previous sessions - don't call initializers
        }


        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(
            ConnectionCorePlugin.getDefault().getPluginProperties().getString(
                "ExtensionPoint_ConnectionInitializer_id" ) ); //$NON-NLS-1$


        IConfigurationElement[] configurationElements = extensionPoint.getConfigurationElements();
        for ( IConfigurationElement configurationElement : configurationElements )
        {
            if ( "connection".equals( configurationElement.getName() ) ) //$NON-NLS-1$
            {
                addInitialConnection( configurationElement );

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     */
    public static List<SchemaConnector> getSchemaConnectors()
    {
        List<SchemaConnector> schemaConnectors = new ArrayList<SchemaConnector>();


        IExtensionPoint extensionPoint = Platform.getExtensionRegistry().getExtensionPoint(
            Activator.getDefault().getPluginProperties().getString( "ExtensionPoint_SchemaConnectors_id" ) );
        IConfigurationElement[] members = extensionPoint.getConfigurationElements();


        if ( members != null )
        {
            // Creating each SchemaConnector
            for ( IConfigurationElement member : members )

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     * @return the connection parameter pages
     */
    public static ConnectionParameterPage[] getConnectionParameterPages()
    {
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint( ConnectionUIPlugin.getDefault()
            .getPluginProperties().getString( "ExtensionPoint_ConnectionParameterPages_id" ) ); //$NON-NLS-1$
        IConfigurationElement[] members = extensionPoint.getConfigurationElements();
        final Map<String, ConnectionParameterPage> pageMap = new HashMap<String, ConnectionParameterPage>();


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

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  // load all of the external editor xml data
  //   (but don't load the actual editors, yet)
  private void getExternalEditorConfigurations () {
    // Get extension point from Registry
    IExtensionPoint point = Platform.getExtensionRegistry()
                .getExtensionPoint(TAEConfiguratorPlugin.pluginId, EXTENSION_POINT_ID);
    
    externalEditorConfigurations = new ArrayList<IConfigurationElement>();
    
    // check: Any <extension> tags for our extension-point?
    if (point != null) {
      for (IExtension extension : point.getExtensions()) {
        Bundle b = Platform.getBundle(extension.getContributor().getName());
        if (b == null) {
          Utility.popMessage(
              "Problem with Editor Extension",
              "Editor '" + extension.getContributor().getName() + "' is present, but can't be loaded, probably because of unsatisfied dependencies\n",

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    public List<AdapterFactory> getAdapterFactories() {
        if (adapterFactories == null) {
            adapterFactories = new ArrayList<AdapterFactory>();


            IExtensionRegistry registry = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registry.getExtensionPoint(ADAPTER_FACTORIES_ID);
            IExtension[] extensions = extensionPoint.getExtensions();


            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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    public synchronized static List<ExpressionViewerFactory> factoryList() {
        if (factoryList == null) {
            ArrayList<ExpressionViewerFactory> list = new ArrayList<ExpressionViewerFactory>();


            IExtensionRegistry registery = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registery.getExtensionPoint(FILTER_VIEWER_EXTENSION);


            IConfigurationElement[] configurationElements = extensionPoint
                    .getConfigurationElements();
            for (IConfigurationElement configuration : configurationElements) {
                if ("expressionViewer".equals(configuration.getName())) {
                    try {
                        ExpressionViewerFactory factory;

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 */
public class PlatformExample {
    void processingExtensionPointByHand() {
        String xpid = "org.locationtech.udig.project.ui.tool";
        IExtensionRegistry registry = Platform.getExtensionRegistry();
        IExtensionPoint extensionPoint = registry.getExtensionPoint(xpid);
        if (extensionPoint == null) {
            throw new NullPointerException("Could not find extensionPoint:" + xpid);
        }
        for( IExtension extension : extensionPoint.getExtensions() ) {
            for( IConfigurationElement element : extension.getConfigurationElements() ) {
                String name = element.getName();
                System.out.println(name);
                if ("modalTool".equals(name)) {
                    try {

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    private synchronized static List<FilterViewerFactory> filterViewerFactoryList() {
        if (filterViewerFactoryList == null) {
            ArrayList<FilterViewerFactory> list = new ArrayList<FilterViewerFactory>();
            
            IExtensionRegistry registery = Platform.getExtensionRegistry();
            IExtensionPoint extensionPoint = registery.getExtensionPoint(FILTER_VIEWER_EXTENSION);
            
            IConfigurationElement[] configurationElements = extensionPoint.getConfigurationElements();
            for (IConfigurationElement configuration : configurationElements) {
                if ("filterViewer".equals(configuration.getName())) {
                    try {
                        FilterViewerFactory factory;
                        factory = (FilterViewerFactory) configuration.createExecutableExtension("class");

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    /**
     * See who is plugged into the extension point.
     */
    private void initializeScopes() {
        IExtensionPoint point = Platform.getExtensionRegistry().getExtensionPoint(StyleEditor.ID);
        if (point == null)
            return;
        IExtension[] extensions = point.getExtensions();
        for (int i = 0; i < extensions.length; i++) {
            IConfigurationElement[] elements = extensions[i].getConfigurationElements();
            for (int j = 0; j < elements.length; j++)
                if (ELEMENT_SCOPE.equalsIgnoreCase(elements[j].getName()))
                    scopeAdded(elements[j]);

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  private static ClasspathContainerInitializer computeClasspathContainerInitializer(String containerID) {
    Plugin jdtCorePlugin = JavaCore.getPlugin();
    if (jdtCorePlugin == null) return null;


    IExtensionPoint extension = Platform.getExtensionRegistry().getExtensionPoint(JavaCore.PLUGIN_ID, JavaModelManager.CPCONTAINER_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 configurationElement = configElements[j];
          String initializerID = configurationElement.getAttribute("id"); //$NON-NLS-1$

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