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.blueprint;
018
019 import java.util.LinkedHashMap;
020 import java.util.Map;
021
022 import org.apache.aries.blueprint.ExtendedBeanMetadata;
023 import org.apache.aries.blueprint.mutable.MutableReferenceMetadata;
024 import org.apache.camel.NoSuchBeanException;
025 import org.apache.camel.spi.Registry;
026 import org.osgi.framework.Bundle;
027 import org.osgi.service.blueprint.container.BlueprintContainer;
028 import org.osgi.service.blueprint.container.NoSuchComponentException;
029
030 public class BlueprintContainerRegistry implements Registry {
031
032 private final BlueprintContainer blueprintContainer;
033
034 public BlueprintContainerRegistry(BlueprintContainer blueprintContainer) {
035 this.blueprintContainer = blueprintContainer;
036 }
037
038 public Object lookup(String name) {
039 return blueprintContainer.getComponentInstance(name);
040 }
041
042 public <T> T lookup(String name, Class<T> type) {
043 Object answer;
044 try {
045 answer = blueprintContainer.getComponentInstance(name);
046 } catch (NoSuchComponentException e) {
047 return null;
048 }
049
050 // just to be safe
051 if (answer == null) {
052 return null;
053 }
054
055 try {
056 return type.cast(answer);
057 } catch (Throwable e) {
058 String msg = "Found bean: " + name + " in BlueprintContainer: " + blueprintContainer
059 + " of type: " + answer.getClass().getName() + " expected type was: " + type;
060 throw new NoSuchBeanException(name, msg, e);
061 }
062 }
063
064 public <T> Map<String, T> lookupByType(Class<T> type) {
065 return lookupByType(blueprintContainer, type);
066 }
067
068 public static <T> Map<String, T> lookupByType(BlueprintContainer blueprintContainer, Class<T> type) {
069 Map<String, T> objects = new LinkedHashMap<String, T>();
070 for (ExtendedBeanMetadata metadata : blueprintContainer.getMetadata(ExtendedBeanMetadata.class)) {
071 try {
072 Class cl = metadata.getRuntimeClass();
073 if (cl == null && metadata.getClassName() != null) {
074 Bundle bundle = (Bundle) blueprintContainer.getComponentInstance("blueprintBundle");
075 cl = bundle.loadClass(metadata.getClassName());
076 }
077 if (cl == null || type.isAssignableFrom(cl)) {
078 Object o = blueprintContainer.getComponentInstance(metadata.getId());
079 objects.put(metadata.getId(), type.cast(o));
080 }
081 } catch (Throwable t) {
082 // ignore
083 }
084 }
085 for (MutableReferenceMetadata metadata : blueprintContainer.getMetadata(MutableReferenceMetadata.class)) {
086 try {
087 Class cl = metadata.getRuntimeInterface();
088 if (cl == null && metadata.getInterface() != null) {
089 Bundle bundle = (Bundle) blueprintContainer.getComponentInstance("blueprintBundle");
090 cl = bundle.loadClass(metadata.getInterface());
091 }
092 if (cl == null || type.isAssignableFrom(cl)) {
093 Object o = blueprintContainer.getComponentInstance(metadata.getId());
094 objects.put(metadata.getId(), type.cast(o));
095 }
096 } catch (Throwable t) {
097 // ignore
098 }
099 }
100 return objects;
101 }
102
103 }