| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.servicemix.specs.locator; |
| |
| import java.util.concurrent.Callable; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.HashMap; |
| import java.util.ArrayList; |
| import java.util.Set; |
| import java.util.HashSet; |
| |
| public class OsgiLocator { |
| |
| private static Map<String, List<Callable<Class>>> factories; |
| |
| private OsgiLocator() { |
| } |
| |
| public static synchronized void unregister(String id, Callable<Class> factory) { |
| if (factories != null) { |
| List<Callable<Class>> l = factories.get(id); |
| if (l != null) { |
| l.remove(factory); |
| } |
| } |
| } |
| |
| public static synchronized void register(String id, Callable<Class> factory) { |
| if (factories == null) { |
| factories = new HashMap<String, List<Callable<Class>>>(); |
| } |
| List<Callable<Class>> l = factories.get(id); |
| if (l == null) { |
| l = new ArrayList<Callable<Class>>(); |
| factories.put(id, l); |
| } |
| l.add(factory); |
| } |
| |
| public static synchronized Class locate(String factoryId) { |
| if (factories != null) { |
| List<Callable<Class>> l = factories.get(factoryId); |
| if (l != null && !l.isEmpty()) { |
| Callable<Class> c = l.get(l.size() - 1); |
| try { |
| return c.call(); |
| } catch (Exception e) { |
| } |
| } |
| } |
| return null; |
| } |
| |
| public static synchronized List<Class> locateAll(String factoryId) { |
| List<Class> classes = new ArrayList<Class>(); |
| if (factories != null) { |
| List<Callable<Class>> l = factories.get(factoryId); |
| if (l != null) { |
| for (Callable<Class> c : l) { |
| try { |
| classes.add(c.call()); |
| } catch (Exception e) { |
| } |
| } |
| } |
| } |
| return classes; |
| } |
| |
| } |