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; 023 024 import org.apache.camel.NoSuchBeanException; 025 import org.apache.camel.RuntimeCamelException; 026 import org.apache.camel.spi.Registry; 027 028 /** 029 * This registry will look up the object with the sequence of the registry list until it finds the Object. 030 */ 031 public class CompositeRegistry implements Registry { 032 private List<Registry> registryList; 033 034 public CompositeRegistry() { 035 registryList = new ArrayList<Registry>(); 036 } 037 038 public CompositeRegistry(List<Registry> registries) { 039 registryList = registries; 040 } 041 042 public void addRegistry(Registry registry) { 043 registryList.add(registry); 044 } 045 046 public <T> T lookup(String name, Class<T> type) { 047 T answer = null; 048 RuntimeCamelException ex = null; 049 for (Registry registry : registryList) { 050 try { 051 answer = registry.lookup(name, type); 052 } catch (Throwable e) { 053 // do not double wrap the exception 054 if (e instanceof NoSuchBeanException) { 055 ex = (NoSuchBeanException)e; 056 } else { 057 ex = new NoSuchBeanException(name, "Cannot lookup: " + name + " from registry: " + registry 058 + " with expected type: " + type + " due: " + e.getMessage(), e); 059 } 060 } 061 if (answer != null) { 062 return answer; 063 } 064 } 065 if (ex != null) { 066 throw ex; 067 } else { 068 return answer; 069 } 070 } 071 072 public Object lookup(String name) { 073 Object answer = null; 074 for (Registry registry : registryList) { 075 answer = registry.lookup(name); 076 if (answer != null) { 077 break; 078 } 079 } 080 return answer; 081 } 082 083 public <T> Map<String, T> lookupByType(Class<T> type) { 084 Map<String, T> answer = Collections.<String, T>emptyMap(); 085 for (Registry registry : registryList) { 086 answer = registry.lookupByType(type); 087 if (!answer.isEmpty()) { 088 break; 089 } 090 } 091 return answer; 092 } 093 094 }