001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.impl;
018
019 import java.util.ArrayList;
020 import java.util.Collections;
021 import java.util.List;
022 import java.util.Map;
023 import java.util.Set;
024
025 import org.apache.camel.NoSuchBeanException;
026 import org.apache.camel.RuntimeCamelException;
027 import org.apache.camel.spi.Registry;
028
029 /**
030 * This registry will look up the object with the sequence of the registry list until it finds the Object.
031 */
032 public class CompositeRegistry implements Registry {
033 private final List<Registry> registryList;
034
035 public CompositeRegistry() {
036 registryList = new ArrayList<Registry>();
037 }
038
039 public CompositeRegistry(List<Registry> registries) {
040 registryList = registries;
041 }
042
043 public void addRegistry(Registry registry) {
044 registryList.add(registry);
045 }
046
047 List<Registry> getRegistryList() {
048 return registryList;
049 }
050
051 public <T> T lookupByNameAndType(String name, Class<T> type) {
052 T answer = null;
053 RuntimeCamelException ex = null;
054 for (Registry registry : registryList) {
055 try {
056 answer = registry.lookupByNameAndType(name, type);
057 } catch (Throwable e) {
058 // do not double wrap the exception
059 if (e instanceof NoSuchBeanException) {
060 ex = (NoSuchBeanException)e;
061 } else {
062 ex = new NoSuchBeanException(name, "Cannot lookup: " + name + " from registry: " + registry
063 + " with expected type: " + type + " due: " + e.getMessage(), e);
064 }
065 }
066 if (answer != null) {
067 return answer;
068 }
069 }
070 if (ex != null) {
071 throw ex;
072 } else {
073 return answer;
074 }
075 }
076
077 public Object lookupByName(String name) {
078 Object answer = null;
079 for (Registry registry : registryList) {
080 answer = registry.lookupByName(name);
081 if (answer != null) {
082 break;
083 }
084 }
085 return answer;
086 }
087
088 public <T> Map<String, T> findByTypeWithName(Class<T> type) {
089 Map<String, T> answer = Collections.emptyMap();
090 for (Registry registry : registryList) {
091 answer = registry.findByTypeWithName(type);
092 if (!answer.isEmpty()) {
093 break;
094 }
095 }
096 return answer;
097 }
098
099 public <T> Set<T> findByType(Class<T> type) {
100 Set<T> answer = Collections.emptySet();
101 for (Registry registry : registryList) {
102 answer = registry.findByType(type);
103 if (!answer.isEmpty()) {
104 break;
105 }
106 }
107 return answer;
108 }
109
110 public Object lookup(String name) {
111 return lookupByName(name);
112 }
113
114 public <T> T lookup(String name, Class<T> type) {
115 return lookupByNameAndType(name, type);
116 }
117
118 public <T> Map<String, T> lookupByType(Class<T> type) {
119 return findByTypeWithName(type);
120 }
121 }