Examples of org.eclipse.core.runtime.IConfigurationElement

org.eclipse.core.runtime.IConfigurationElement
A configuration element, with its attributes and children, directly reflects the content and structure of the extension section within the declaring plug-in's manifest (plugin.xml) file.
This interface also provides a way to create executable extension objects.

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 configuration element objects, the most common case is code in a plug-in dealing with extensions contributed to one of the extension points it declares. 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 when accessing the extension and configuration element objects because they become invalid if the contributing 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 or configuration element 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.

                IDavinciServerConstants.EP_TAG_JSPLUGIN);
        StringBuffer sb = new StringBuffer();
        sb.append("[");
        boolean wasOne = false;
        for (Iterator iterator = extensions.iterator(); iterator.hasNext();) {
            IConfigurationElement configElement = (IConfigurationElement) iterator.next();
            String role = configElement.getAttribute(IDavinciServerConstants.EP_ATTR_JSPLUGIN_ROLE);
            if (role != null && role.length() > 0) {
                // validate authorization for this plugin
            }


            if (wasOne) {
                sb.append(",");
            }
            wasOne = true;
            String path = configElement.getAttribute(IDavinciServerConstants.EP_ATTR_JSPLUGIN_PATH);
            sb.append('"').append(path).append("\",");
            String resourcePath = configElement.getAttribute(IDavinciServerConstants.EP_ATTR_JSPLUGIN_RESOURCE_PATH);
            String bundleName = configElement.getDeclaringExtension().getContributor().getName();
            Bundle bundle = Activator.getActivator().getOtherBundle(bundleName);
            if (bundle != null) {
                URL resourceURL = bundle.getEntry(resourcePath + ".plugin");
                if (resourceURL != null) {
                  InputStreamReader reader = null;

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            IExtension extension = extensions[i];
            IConfigurationElement[] elements = extension.getConfigurationElements();


            // For each member of the extension ...
            for( int j = 0; j < elements.length; j++ ) {
                IConfigurationElement element = elements[j];
                try {
                    processor.process(extension, element);
                } catch (Throwable exception) {
                    plugin
                            .getLog()
                            .log(
                                    new Status(
                                            IStatus.WARNING,
                                            element.getNamespaceIdentifier(),
                                            0,
                                            MessageFormat
                                                    .format(
                                                            "Error processing extension {0}", new Object[]{exception}), exception)); //$NON-NLS-1$                    
                }

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            IExtension extension = extensions[i];
            IConfigurationElement[] elements = extension.getConfigurationElements();


            // For each member of the extension ...
            for( int j = 0; j < elements.length; j++ ) {
                IConfigurationElement element = elements[j];
                try {
                    Object obj = itemCreator.createItem(extension, element);
                    if (obj == null)
                        continue; // warning?

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      }
    }
  }
  
  private AbstractClassModel newModel(String id, WidgetAdapter adapter, EventSetDescriptor eventSet) {
    IConfigurationElement config = listenerModels.get(id);
    try {
      AbstractClassModel model = (AbstractClassModel) config.createExecutableExtension("class");
      model.init(adapter, eventSet);
      return model;
    } catch (CoreException e) {
      ParserPlugin.getLogger().error(e);
      return null;

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    };
  }
  class PriorityComparator implements Comparator<String>{
    
    public int compare(String o1, String o2) {
      IConfigurationElement config1 = listenerModels.get(o1);
      IConfigurationElement config2 = listenerModels.get(o2);
      String sp1=config1.getAttribute("priority");
      String sp2=config2.getAttribute("priority");
      int p1=sp1==null?Integer.MAX_VALUE:Integer.parseInt(sp1);
      int p2=sp1==null?Integer.MAX_VALUE:Integer.parseInt(sp2);
      return p1-p2;
    }

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    children = config
        .getChildren(IWorkbenchRegistryConstants.TAG_SELECTION);
    if (children.length > 0) {
      classes = new ArrayList();
      for (int i = 0; i < children.length; i++) {
        IConfigurationElement sel = children[i];
        String cname = sel
            .getAttribute(IWorkbenchRegistryConstants.ATT_CLASS);
        String name = sel
            .getAttribute(IWorkbenchRegistryConstants.ATT_NAME);
        SelectionClass sclass = new SelectionClass();
        sclass.className = cname;
        sclass.nameFilter = name;
        classes.add(sclass);

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    /* (non-Javadoc)
     * @see org.eclipse.core.runtime.dynamicHelpers.IExtensionChangeHandler#addExtension(org.eclipse.core.runtime.dynamicHelpers.IExtensionTracker, org.eclipse.core.runtime.IExtension)
     */
    public void addExtension(IExtensionTracker tracker, IExtension addedExtension) {
        IConfigurationElement addedElements[] = addedExtension.getConfigurationElements();
        for (int i = 0; i < addedElements.length; i++) {
            DecoratorRegistryReader reader = new DecoratorRegistryReader();
            reader.readElement(addedElements[i]);
            for (Iterator j = reader.getValues().iterator(); j.hasNext();) {
                addDecorator((DecoratorDefinition) j.next());

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    // Sort the commands extension point based on element name.
    final IConfigurationElement[] commandsExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_COMMANDS);
    for (int i = 0; i < commandsExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = commandsExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if it is a handler submission or a command definition.
      if (TAG_HANDLER_SUBMISSION.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements,
            INDEX_HANDLER_SUBMISSIONS, handlerSubmissionCount++);
      } else if (TAG_COMMAND.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements,
            INDEX_COMMAND_DEFINITIONS, commandDefinitionCount++);
      }
    }


    // Sort the handler extension point based on element name.
    final IConfigurationElement[] handlersExtensionPoint = registry
        .getConfigurationElementsFor(EXTENSION_HANDLERS);
    for (int i = 0; i < handlersExtensionPoint.length; i++) {
      final IConfigurationElement configurationElement = handlersExtensionPoint[i];
      final String name = configurationElement.getName();


      // Check if it is a handler submission or a command definition.
      if (TAG_HANDLER.equals(name)) {
        addElementToIndexedArray(configurationElement,
            indexedConfigurationElements,

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   */
  private final void readDefaultHandlersFromRegistry(
      final IConfigurationElement[] configurationElements,
      final int configurationElementCount) {
    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      /*
       * Read out the command identifier. This was already checked by
       * <code>CommandPersistence</code>, so we'll just ignore any
       * problems here.
       */
      final String commandId = readOptional(configurationElement, ATT_ID);
      if (commandId == null) {
        continue;
      }


      // Check to see if we have a default handler of any kind.
      if ((configurationElement.getAttribute(ATT_DEFAULT_HANDLER) == null)
          && (configurationElement.getChildren(TAG_DEFAULT_HANDLER).length == 0)) {
        continue;
      }


      handlerActivations.add(handlerService
          .activateHandler(commandId, new HandlerProxy(

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      final IConfigurationElement[] configurationElements,
      final int configurationElementCount) {
    final List warningsToLog = new ArrayList(1);


    for (int i = 0; i < configurationElementCount; i++) {
      final IConfigurationElement configurationElement = configurationElements[i];


      // Read out the command identifier.
      final String commandId = readRequired(configurationElement,
          ATT_COMMAND_ID, warningsToLog, "Handlers need a command id"); //$NON-NLS-1$
      if (commandId == null) {

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