Examples of org.eclipse.core.runtime.IExtension

org.eclipse.core.runtime.IExtension
An extension declared in a plug-in. All information 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 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 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 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.

        "net.sf.springofeclipse.imports");


    IExtension[] extensions = ep.getExtensions();


    for (int i = 0; i < extensions.length; i++) {
      IExtension extension = extensions[i];


      IConfigurationElement[] elements = extension
          .getConfigurationElements();


      for (int j = 0; j < elements.length; j++) {
        IConfigurationElement configurationElement = elements[j];


        String contextIdTemp = configurationElement
            .getAttribute("contextId");


        if (contextId.equals(contextIdTemp)) {
          if (log.isDebugEnabled()) {
            log.debug("loading imports for context: [id="
                + contextId + "]");
          }


          ImportConfiguration configuration = new ImportConfiguration();


          Bundle bundle = Platform.getBundle(extension
              .getNamespaceIdentifier());


          configuration.classLoader = new BundleClassLoader(bundle);


          String readerClassName = configurationElement

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            IExtension[] extensions = extensionPoint.getExtensions();
            if ( extensions != null )
            {
                for ( int i = 0; i < extensions.length; i++ )
                {
                    IExtension extension = extensions[i];
                    IConfigurationElement[] elements = extension.getConfigurationElements();
                    for ( int j = 0; j < elements.length; j++ )
                    {
                        IConfigurationElement element = elements[j];
                        if ( element.getName().equals( "perspective" ) )
                        {

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        {
            ValueEditorExtension proxy = new ValueEditorExtension();
            valueEditorExtensions.add( proxy );


            IConfigurationElement member = members[m];
            IExtension extension = member.getDeclaringExtension();
            String extendingPluginId = extension.getNamespaceIdentifier();


            proxy.member = member;
            proxy.name = member.getAttribute( "name" );
            String iconPath = member.getAttribute( "icon" );
            proxy.icon = AbstractUIPlugin.imageDescriptorFromPlugin( extendingPluginId, iconPath );

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            IExtension[] extensions = extensionPoint.getExtensions();
            if ( extensions != null )
            {
                for ( int i = 0; i < extensions.length; i++ )
                {
                    IExtension extension = extensions[i];
                    IConfigurationElement[] elements = extension.getConfigurationElements();
                    for ( int j = 0; j < elements.length; j++ )
                    {
                        IConfigurationElement element = elements[j];
                        if ( element.getName().equals( "perspective" ) ) //$NON-NLS-1$
                        {

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            IExtension[] extensions = extensionPoint.getExtensions();
            if ( extensions != null )
            {
                for ( int i = 0; i < extensions.length; i++ )
                {
                    IExtension extension = extensions[i];
                    IConfigurationElement[] elements = extension.getConfigurationElements();
                    for ( int j = 0; j < elements.length; j++ )
                    {
                        IConfigurationElement element = elements[j];
                        if ( element.getName().equals( "perspective" ) )
                        {

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        {
            ValueEditorExtension proxy = new ValueEditorExtension();
            valueEditorProxies.add( proxy );


            IConfigurationElement member = members[m];
            IExtension extension = member.getDeclaringExtension();
            String extendingPluginId = extension.getNamespaceIdentifier();


            proxy.member = member;
            proxy.name = member.getAttribute( "name" );
            String iconPath = member.getAttribute( "icon" );
            proxy.icon = AbstractUIPlugin.imageDescriptorFromPlugin( extendingPluginId, iconPath );

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    public ImageDescriptor getIcon() {
        if (icon == null) {
      return null;
    }


        IExtension extension = configElement.getDeclaringExtension();
        String extendingPluginId = extension.getNamespace();
        return AbstractUIPlugin.imageDescriptorFromPlugin(extendingPluginId,
                icon);
    }

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        // If the icon attribute was omitted, use the default one
        if (iconName == null) {
      return PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(
                    ISharedImages.IMG_DEF_VIEW);
    }
        IExtension extension = configElement.getDeclaringExtension();
        String extendingPluginId = extension.getNamespace();
        imageDescriptor = AbstractUIPlugin.imageDescriptorFromPlugin(
                extendingPluginId, iconName);
        // If the icon attribute was invalid, use the error icon
        if (imageDescriptor == null) {
            imageDescriptor = ImageDescriptor.getMissingImageDescriptor();

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    public void registryChanged(IRegistryChangeEvent event) {
        try {
            IExtensionDelta delta[] = event
                    .getExtensionDeltas(WorkbenchPlugin.PI_WORKBENCH);
            IExtension ext;
            IExtensionPoint extPt;
            IWorkbenchWindow[] win = PlatformUI.getWorkbench()
                    .getWorkbenchWindows();
            if (win.length == 0) {
        return;

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            extensions.length);
        for (int i = 0; i < extensions.length; ++i) {
          if (monitor.isCanceled() || !isRunning()) {
            return Status.CANCEL_STATUS;
          }
          IExtension extension = extensions[i];


          // if the plugin is not in the set of disabled plugins, then
          // execute the code to start it
          if (!disabledPlugins.contains(extension.getNamespace())) {
            monitor.subTask(extension.getNamespace());
            SafeRunner.run(new EarlyStartupRunnable(extension));
          }
          monitor.worked(1);
        }
        monitor.done();

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