| // |
| // ======================================================================== |
| // Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.websocket.api.extensions; |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.ServiceLoader; |
| import java.util.Set; |
| |
| public abstract class ExtensionFactory implements Iterable<Class<? extends Extension>> |
| { |
| private ServiceLoader<Extension> extensionLoader = ServiceLoader.load(Extension.class); |
| private Map<String, Class<? extends Extension>> availableExtensions; |
| |
| public ExtensionFactory() |
| { |
| availableExtensions = new HashMap<>(); |
| for (Extension ext : extensionLoader) |
| { |
| if (ext != null) |
| { |
| availableExtensions.put(ext.getName(),ext.getClass()); |
| } |
| } |
| } |
| |
| public Map<String, Class<? extends Extension>> getAvailableExtensions() |
| { |
| return availableExtensions; |
| } |
| |
| public Class<? extends Extension> getExtension(String name) |
| { |
| return availableExtensions.get(name); |
| } |
| |
| public Set<String> getExtensionNames() |
| { |
| return availableExtensions.keySet(); |
| } |
| |
| public boolean isAvailable(String name) |
| { |
| return availableExtensions.containsKey(name); |
| } |
| |
| @Override |
| public Iterator<Class<? extends Extension>> iterator() |
| { |
| return availableExtensions.values().iterator(); |
| } |
| |
| public abstract Extension newInstance(ExtensionConfig config); |
| |
| public void register(String name, Class<? extends Extension> extension) |
| { |
| availableExtensions.put(name,extension); |
| } |
| |
| public void unregister(String name) |
| { |
| availableExtensions.remove(name); |
| } |
| } |