org.apache.felix.ipojo/src/main/java/org/apache/felix/ipojo/ComponentManagerFactory.java - onos-felix - Gitiles

 /*
  *   Copyright 2006 The Apache Software Foundation
  *
  *   Licensed under the Apache License, Version 2.0 (the "License");
  *   you may not use this file except in compliance with the License.
  *   You may obtain a copy of the License at
  *
  *       http://www.apache.org/licenses/LICENSE-2.0
  *
  *   Unless required by applicable law or agreed to in writing, software
  *   distributed under the License is distributed on an "AS IS" BASIS,
  *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *   See the License for the specific language governing permissions and
  *   limitations under the License.
  *
  */
 package org.apache.felix.ipojo;

 import java.io.IOException;
 import java.net.URL;
 import java.security.ProtectionDomain;
 import java.util.Enumeration;
 import java.util.logging.Level;

 import org.apache.felix.ipojo.metadata.Element;
 import org.osgi.framework.BundleContext;

 /**
  * The component manager factory class manages component manager object.
  * @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
  */
 public class ComponentManagerFactory {

 	// Fields :
 	/**
 	 * List of the managed component manager.
 	 */
 	private ComponentManager[] m_componentManagers = new ComponentManager[0];

 	/**
 	 * The bundle context reference.
 	 */
 	private BundleContext m_bundleContext = null;

 	/**
 	 * Component class.
 	 */
 	private byte[] m_clazz = null;

 	/**
 	 * Component Class Name.
 	 */
 	private String m_componentClassName = null;

 	/**
 	 * Classloader to delegate loading.
 	 */
 	private FactoryClassloader m_classLoader = null;

 	//End field

 	/**
 	 * FactoryClassloader.
 	 */
 	private class FactoryClassloader extends ClassLoader {

 	    /**
 	     * load the class.
 	     * @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
 	     * @param name : the name of the class
 	     * @param resolve : should be the class resolve now ?
 	     * @return : the loaded class
 	     * @throws ClassNotFoundException : the class to load is not found
 	     */
 	    protected synchronized Class loadClass(final String name,
 	            final boolean resolve) throws ClassNotFoundException {
 	       return m_bundleContext.getBundle().loadClass(name);
 	    }


 	    /**
 	     * Return the URL of the asked ressource.
 	     * @param arg : the name of the resource to find.
 	     * @return the URL of the resource.
 	     * @see java.lang.ClassLoader#getResource(java.lang.String)
 	     */
 	    public URL getResource(String arg) {
 	        return m_bundleContext.getBundle().getResource(arg);
 	    }

 	    /**
 	     * .
 	     * @param arg : resource to find
 	     * @return : the enumeration found
 	     * @throws IOException : if the lookup failed.
 	     * @see java.lang.ClassLoader#getResources(java.lang.String)
 	     */
 	    public Enumeration getRessources(String arg) throws IOException {
 	        return m_bundleContext.getBundle().getResources(arg);
 	    }

 	    /**
 	     * The defineClass method.
 	     * @param name : name of the class
 	     * @param b : the byte array of the class
 	     * @param domain : the protection domain
 	     * @return : the defined class.
 	     * @throws Exception : if a problem is detected during the loading
 	     */
 	    public Class defineClass(String name, byte[] b,
 	            ProtectionDomain domain) throws Exception {
 	    	return super.defineClass(name, b, 0, b.length, domain);
 	    }
 	}

 	// Field accessors

 	 /**
      * Add a component manager factory to the component manager list.
      * @param cm : the new component metadata.
      */
     private void addComponent(ComponentManager cm) {

     	// If the component manager array is not empty add the new factory at the end
         if (m_componentManagers.length != 0) {
         	ComponentManager[] newCM = new ComponentManager[m_componentManagers.length + 1];
             System.arraycopy(m_componentManagers, 0, newCM, 0, m_componentManagers.length);
             newCM[m_componentManagers.length] = cm;
             m_componentManagers = newCM;
         }
         // Else create an array of size one with the new component manager
         else {
             m_componentManagers = new ComponentManager[] {cm};
         }
     }

     /**
      * Remove the component manager for m the list.
      * @param cm : the component manager to remove
      */
     public void removeComponent(ComponentManager cm) {
     	cm.stop();
     	int idx = -1;

     	for (int i = 0; i < m_componentManagers.length; i++) {
     		if (m_componentManagers[i] == cm) { idx = i; }
     	}

         if (idx >= 0) {
             if ((m_componentManagers.length - 1) == 0) { m_componentManagers = new ComponentManager[0]; }
             else {
             	ComponentManager[] newCMList = new ComponentManager[m_componentManagers.length - 1];
                 System.arraycopy(m_componentManagers, 0, newCMList, 0, idx);
                 if (idx < newCMList.length) {
                     System.arraycopy(m_componentManagers, idx + 1, newCMList, idx, newCMList.length - idx); }
                 m_componentManagers = newCMList;
             }
             }
        }

     /**
      * @return the iPOJO activator reference
      */
     public BundleContext getBundleContext() { return m_bundleContext; }

 	// End field accessors

 	/**
 	 * Create a component manager factory and create a component manager with the given medatada.
 	 * @param bc : bundle context
 	 * @param cm : metadata of the component to create
 	 */
 	public ComponentManagerFactory(BundleContext bc, Element cm) {
 		m_bundleContext = bc;
 		createComponentManager(cm);
 		m_componentClassName = cm.getAttribute("className");
 	}

 	/**
 	 * Create a component manager factory and create a component manager with the given medatada.
 	 * @param bc : bundle context
 	 * @param clazz : the component class
 	 * @param cm : metadata of the component
 	 */
 	public ComponentManagerFactory(BundleContext bc, byte[] clazz, Element cm) {
 		m_bundleContext = bc;
 		m_clazz = clazz;
 		m_componentClassName = cm.getAttribute("className");
 		createComponentManager(cm);
 	}

 	/**
 	 * Create a component manager factory, no component manager are created.
 	 * @param bc
 	 */
 	public ComponentManagerFactory(BundleContext bc) {
 		m_bundleContext = bc;
 	}

 	/**
 	 * Create a component manager form the component metadata.
 	 * @param cm : Component Metadata
 	 * @return a component manager configured with the metadata
 	 */
 	public ComponentManager createComponentManager(Element cm) {
 		ComponentManager component = new ComponentManager(this);
 		component.configure(cm);
 		addComponent(component);
 		return component;
 	}

 	// Factory lifecycle management

 	/**
 	 * Stop all the component managers.
 	 */
 	public void stop() {
 		Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Stop the component factory");
 		for (int i = 0; i < m_componentManagers.length; i++) {
 			ComponentManager cm = m_componentManagers[i];
 			cm.stop();
 		}
 	}

 	/**
 	 * Start all the component managers.
 	 */
 	public void start() {
 		Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Start the component factory");
 		for (int i = 0; i < m_componentManagers.length; i++) {
 			ComponentManager cm = m_componentManagers[i];
 			cm.start();
 		}
 	}

 	/**
 	 * Load a class.
 	 * @param className : name of the class to load
 	 * @return the resulting Class object
 	 * @throws ClassNotFoundException : happen when the class is not found
 	 */
 	public Class loadClass(String className) throws ClassNotFoundException {
 		Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] In load for : " + className);
 		if (m_clazz != null && className.equals(m_componentClassName)) {
 			if (m_classLoader == null) {
 				Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Create the FactoryClassLoader for : " + className);
 				m_classLoader = new FactoryClassloader();
 				}
 			try {
 				Class c = m_classLoader.defineClass(m_componentClassName, m_clazz, null);
 				Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Return " + c + " for " + className);
 				return c;
 			} catch (Exception e) {
 				Activator.getLogger().log(Level.SEVERE, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Cannot define the class : " + className);
 				return null;
 			}
 		}
 		return m_bundleContext.getBundle().loadClass(className);
 	}

 	/**
 	 * Return the URL of a resource.
 	 * @param resName : resource name
 	 * @return the URL of the resource
 	 */
 	public URL getResource(String resName) {
 		return m_bundleContext.getBundle().getResource(resName);
 	}

 }
	/*
	* Copyright 2006 The Apache Software Foundation
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*
	*/
	package org.apache.felix.ipojo;

	import java.io.IOException;
	import java.net.URL;
	import java.security.ProtectionDomain;
	import java.util.Enumeration;
	import java.util.logging.Level;

	import org.apache.felix.ipojo.metadata.Element;
	import org.osgi.framework.BundleContext;

	/**
	* The component manager factory class manages component manager object.
	* @author <a href="mailto:felix-dev@incubator.apache.org">Felix Project Team</a>
	*/
	public class ComponentManagerFactory {

	// Fields :
	/**
	* List of the managed component manager.
	*/
	private ComponentManager[] m_componentManagers = new ComponentManager[0];

	/**
	* The bundle context reference.
	*/
	private BundleContext m_bundleContext = null;

	/**
	* Component class.
	*/
	private byte[] m_clazz = null;

	/**
	* Component Class Name.
	*/
	private String m_componentClassName = null;

	/**
	* Classloader to delegate loading.
	*/
	private FactoryClassloader m_classLoader = null;

	//End field

	/**
	* FactoryClassloader.
	*/
	private class FactoryClassloader extends ClassLoader {

	/**
	* load the class.
	* @see java.lang.ClassLoader#loadClass(java.lang.String, boolean)
	* @param name : the name of the class
	* @param resolve : should be the class resolve now ?
	* @return : the loaded class
	* @throws ClassNotFoundException : the class to load is not found
	*/
	protected synchronized Class loadClass(final String name,
	final boolean resolve) throws ClassNotFoundException {
	return m_bundleContext.getBundle().loadClass(name);
	}


	/**
	* Return the URL of the asked ressource.
	* @param arg : the name of the resource to find.
	* @return the URL of the resource.
	* @see java.lang.ClassLoader#getResource(java.lang.String)
	*/
	public URL getResource(String arg) {
	return m_bundleContext.getBundle().getResource(arg);
	}

	/**
	* .
	* @param arg : resource to find
	* @return : the enumeration found
	* @throws IOException : if the lookup failed.
	* @see java.lang.ClassLoader#getResources(java.lang.String)
	*/
	public Enumeration getRessources(String arg) throws IOException {
	return m_bundleContext.getBundle().getResources(arg);
	}

	/**
	* The defineClass method.
	* @param name : name of the class
	* @param b : the byte array of the class
	* @param domain : the protection domain
	* @return : the defined class.
	* @throws Exception : if a problem is detected during the loading
	*/
	public Class defineClass(String name, byte[] b,
	ProtectionDomain domain) throws Exception {
	return super.defineClass(name, b, 0, b.length, domain);
	}
	}

	// Field accessors

	/**
	* Add a component manager factory to the component manager list.
	* @param cm : the new component metadata.
	*/
	private void addComponent(ComponentManager cm) {

	// If the component manager array is not empty add the new factory at the end
	if (m_componentManagers.length != 0) {
	ComponentManager[] newCM = new ComponentManager[m_componentManagers.length + 1];
	System.arraycopy(m_componentManagers, 0, newCM, 0, m_componentManagers.length);
	newCM[m_componentManagers.length] = cm;
	m_componentManagers = newCM;
	}
	// Else create an array of size one with the new component manager
	else {
	m_componentManagers = new ComponentManager[] {cm};
	}
	}

	/**
	* Remove the component manager for m the list.
	* @param cm : the component manager to remove
	*/
	public void removeComponent(ComponentManager cm) {
	cm.stop();
	int idx = -1;

	for (int i = 0; i < m_componentManagers.length; i++) {
	if (m_componentManagers[i] == cm) { idx = i; }
	}

	if (idx >= 0) {
	if ((m_componentManagers.length - 1) == 0) { m_componentManagers = new ComponentManager[0]; }
	else {
	ComponentManager[] newCMList = new ComponentManager[m_componentManagers.length - 1];
	System.arraycopy(m_componentManagers, 0, newCMList, 0, idx);
	if (idx < newCMList.length) {
	System.arraycopy(m_componentManagers, idx + 1, newCMList, idx, newCMList.length - idx); }
	m_componentManagers = newCMList;
	}
	}
	}

	/**
	* @return the iPOJO activator reference
	*/
	public BundleContext getBundleContext() { return m_bundleContext; }

	// End field accessors

	/**
	* Create a component manager factory and create a component manager with the given medatada.
	* @param bc : bundle context
	* @param cm : metadata of the component to create
	*/
	public ComponentManagerFactory(BundleContext bc, Element cm) {
	m_bundleContext = bc;
	createComponentManager(cm);
	m_componentClassName = cm.getAttribute("className");
	}

	/**
	* Create a component manager factory and create a component manager with the given medatada.
	* @param bc : bundle context
	* @param clazz : the component class
	* @param cm : metadata of the component
	*/
	public ComponentManagerFactory(BundleContext bc, byte[] clazz, Element cm) {
	m_bundleContext = bc;
	m_clazz = clazz;
	m_componentClassName = cm.getAttribute("className");
	createComponentManager(cm);
	}

	/**
	* Create a component manager factory, no component manager are created.
	* @param bc
	*/
	public ComponentManagerFactory(BundleContext bc) {
	m_bundleContext = bc;
	}

	/**
	* Create a component manager form the component metadata.
	* @param cm : Component Metadata
	* @return a component manager configured with the metadata
	*/
	public ComponentManager createComponentManager(Element cm) {
	ComponentManager component = new ComponentManager(this);
	component.configure(cm);
	addComponent(component);
	return component;
	}

	// Factory lifecycle management

	/**
	* Stop all the component managers.
	*/
	public void stop() {
	Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Stop the component factory");
	for (int i = 0; i < m_componentManagers.length; i++) {
	ComponentManager cm = m_componentManagers[i];
	cm.stop();
	}
	}

	/**
	* Start all the component managers.
	*/
	public void start() {
	Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Start the component factory");
	for (int i = 0; i < m_componentManagers.length; i++) {
	ComponentManager cm = m_componentManagers[i];
	cm.start();
	}
	}

	/**
	* Load a class.
	* @param className : name of the class to load
	* @return the resulting Class object
	* @throws ClassNotFoundException : happen when the class is not found
	*/
	public Class loadClass(String className) throws ClassNotFoundException {
	Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] In load for : " + className);
	if (m_clazz != null && className.equals(m_componentClassName)) {
	if (m_classLoader == null) {
	Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Create the FactoryClassLoader for : " + className);
	m_classLoader = new FactoryClassloader();
	}
	try {
	Class c = m_classLoader.defineClass(m_componentClassName, m_clazz, null);
	Activator.getLogger().log(Level.INFO, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Return " + c + " for " + className);
	return c;
	} catch (Exception e) {
	Activator.getLogger().log(Level.SEVERE, "[Bundle " + m_bundleContext.getBundle().getBundleId() + "] Cannot define the class : " + className);
	return null;
	}
	}
	return m_bundleContext.getBundle().loadClass(className);
	}

	/**
	* Return the URL of a resource.
	* @param resName : resource name
	* @return the URL of the resource
	*/
	public URL getResource(String resName) {
	return m_bundleContext.getBundle().getResource(resName);
	}

	}