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

            String mode = href.substring(0, index);
            String id = href.substring(index + 1);


            //getEditor().doSave(null);


            IExtensionRegistry registry = Platform.getExtensionRegistry();
            IConfigurationElement[] elements = registry.getConfigurationElementsFor("org.eclipse.debug.ui.launchShortcuts"); //$NON-NLS-1$
            for (int i = 0; i < elements.length; i++)
            {
                if (id.equals(elements[i].getAttribute("id"))) //$NON-NLS-1$
                    try
                    {

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        {
            if (builders.isEmpty())
            {
                final HashMap<IOSGiInstallBuilder, Integer> tmp = new HashMap<IOSGiInstallBuilder, Integer>();


                IExtensionRegistry registry = Platform.getExtensionRegistry();
                IExtensionPoint p = registry.getExtensionPoint(SigilCore.INSTALL_BUILDER_EXTENSION_POINT_ID);
                for (IExtension e : p.getExtensions())
                {
                    for (IConfigurationElement c : e.getConfigurationElements())
                    {
                        createBuilderFromElement(c, tmp);

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        throw e;
      }
    }


    private void loadCommands() {
        IExtensionRegistry registry = Activator.getActivator().getRegistry();
        if (registry != null) {
            IExtensionPoint point = registry.getExtensionPoint(IDavinciServerConstants.BUNDLE_ID, IDavinciServerConstants.EXTENSION_POINT_COMMAND);


            if (point != null) {
                IExtension[] extensions = point.getExtensions();
                for (int i = 0; i < extensions.length; i++) {
                    IConfigurationElement[] elements = extensions[i].getConfigurationElements();

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     * This method can be called more than once in order to reload from a
     * changed extension registry.
     * </p>
     */
    public void reloadExtensions() {
        final IExtensionRegistry registry = Platform.getExtensionRegistry();
        final Map<String, ErlangFoldingStructureProviderDescriptor> map = new HashMap<String, ErlangFoldingStructureProviderDescriptor>();


        final IConfigurationElement[] elements = registry.getConfigurationElementsFor(
                ErlideUIPlugin.PLUGIN_ID, EXTENSION_POINT);
        for (final IConfigurationElement element : elements) {
            final ErlangFoldingStructureProviderDescriptor desc = new ErlangFoldingStructureProviderDescriptor(
                    element);
            map.put(desc.getId(), desc);

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        return result;
    }


    private List<QuickFix> getQuickFixes() {
        final List<QuickFix> result = Lists.newArrayList();
        final IExtensionRegistry reg = RegistryFactory.getRegistry();
        final IConfigurationElement[] elements = reg
                .getConfigurationElementsFor("org.erlide.ui.quickfix");
        for (final IConfigurationElement element : elements) {
            final QuickFix qf = new QuickFix();
            qf.setLabel(element.getAttribute("label"));
            qf.setDescription(element.getAttribute("description"));

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     *
     * @return all contributed Erlang element filters
     */
    public static Collection<FilterDescriptor> getFilterDescriptors() {
        if (fgFilterDescriptors == null) {
            final IExtensionRegistry registry = Platform.getExtensionRegistry();
            final IConfigurationElement[] elements = registry
                    .getConfigurationElementsFor(ErlideUIPlugin.PLUGIN_ID,
                            EXTENSION_POINT_NAME);
            final String extensionPointID = ErlideUIPlugin.PLUGIN_ID + "."
                    + EXTENSION_POINT_NAME;
            fgFilterDescriptors = createFilterDescriptors(elements, extensionPointID);

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        final IWorkspace workspace = ResourcesPlugin.getWorkspace();
        final IWorkspaceRoot workspaceRoot = workspace.getRoot();
        ErlideEventTracer.getInstance().traceSession(
                workspaceRoot.getLocation().toPortableString());


        final IExtensionRegistry extensionRegistry = Platform.getExtensionRegistry();
        final String logDir = workspaceRoot.getLocation().toPortableString();
        final ErlangDebugOptionsManager erlangDebugOptionsManager = new ErlangDebugOptionsManager();


        core = new ErlangCore(this, workspace, extensionRegistry, logDir,
                erlangDebugOptionsManager);

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        }
        return v;
    }


    public static IConfigurationElement[] getSourcepathConfigurationElements() {
        final IExtensionRegistry reg = RegistryFactory.getRegistry();
        return reg.getConfigurationElementsFor(BackendActivator.PLUGIN_ID,
                "sourcePathProvider");
    }

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        return reg.getConfigurationElementsFor(BackendActivator.PLUGIN_ID,
                "sourcePathProvider");
    }


    public static IConfigurationElement[] getCodepathConfigurationElements() {
        final IExtensionRegistry reg = RegistryFactory.getRegistry();
        return reg.getConfigurationElementsFor(BackendActivator.PLUGIN_ID, "codepath");
    }

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        final IExtensionRegistry reg = RegistryFactory.getRegistry();
        return reg.getConfigurationElementsFor(BackendActivator.PLUGIN_ID, "codepath");
    }


    public static IExtensionPoint getCodepathExtension() {
        final IExtensionRegistry reg = Platform.getExtensionRegistry();
        return reg.getExtensionPoint(BackendActivator.PLUGIN_ID, "codepath");
    }

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