public void registerExtension( final PluginDescriptor pluginDescriptor, final Element extensionElement) { final PluginId pluginId = pluginDescriptor.getPluginId(); String epName = extractEPName(extensionElement); ExtensionComponentAdapter adapter; final PicoContainer container = getPluginContainer(pluginId.getIdString()); final ExtensionPoint extensionPoint = getExtensionPoint(epName); if (extensionPoint.getKind() == ExtensionPoint.Kind.INTERFACE) { String implClass = extensionElement.getAttributeValue("implementation"); if (implClass == null) { throw new RuntimeException( "'implementation' attribute not specified for '" + epName + "' extension in '" + pluginId.getIdString() + "' plugin"); } adapter = new ExtensionComponentAdapter( implClass, extensionElement, container, pluginDescriptor, shouldDeserializeInstance(extensionElement)); } else { adapter = new ExtensionComponentAdapter( extensionPoint.getClassName(), extensionElement, container, pluginDescriptor, true); } myExtensionElement2extension.put(extensionElement, adapter); internalGetPluginContainer().registerComponent(adapter); getExtensionPoint(epName).registerExtensionAdapter(adapter); }