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.component.bean; 018 019 import org.apache.camel.CamelContext; 020 import org.apache.camel.Processor; 021 import org.apache.camel.spi.Registry; 022 import org.apache.camel.util.CamelContextHelper; 023 import org.apache.camel.util.ObjectHelper; 024 025 /** 026 * An implementation of a {@link BeanHolder} which will 027 * 028 * @version $Revision: 36321 $ 029 */ 030 public class RegistryBean implements BeanHolder { 031 private final CamelContext context; 032 private final String name; 033 private final Registry registry; 034 private Processor processor; 035 private BeanInfo beanInfo; 036 private Object bean; 037 private ParameterMappingStrategy parameterMappingStrategy; 038 039 public RegistryBean(CamelContext context, String name) { 040 this.context = context; 041 this.name = name; 042 this.registry = context.getRegistry(); 043 } 044 045 public RegistryBean(CamelContext context, String name, ParameterMappingStrategy parameterMappingStrategy) { 046 this(context, name); 047 this.parameterMappingStrategy = parameterMappingStrategy; 048 } 049 050 @Override 051 public String toString() { 052 return "bean: " + name; 053 } 054 055 056 public ConstantBeanHolder createCacheHolder() throws Exception { 057 return new ConstantBeanHolder(getBean(), getBeanInfo()); 058 } 059 060 public Object getBean() throws Exception { 061 Object value = lookupBean(); 062 if (value == null) { 063 throw new NoBeanAvailableException(name); 064 } 065 if (value != bean) { 066 bean = value; 067 processor = null; 068 if (!ObjectHelper.equal(ObjectHelper.type(bean), ObjectHelper.type(value))) { 069 beanInfo = null; 070 } 071 } 072 return value; 073 } 074 075 public Processor getProcessor() { 076 if (processor == null && bean != null) { 077 processor = CamelContextHelper.convertTo(context, Processor.class, bean); 078 } 079 return processor; 080 } 081 082 public BeanInfo getBeanInfo() { 083 if (beanInfo == null && bean != null) { 084 this.beanInfo = createBeanInfo(); 085 } 086 return beanInfo; 087 } 088 089 public String getName() { 090 return name; 091 } 092 093 public Registry getRegistry() { 094 return registry; 095 } 096 097 public CamelContext getContext() { 098 return context; 099 } 100 101 public ParameterMappingStrategy getParameterMappingStrategy() { 102 if (parameterMappingStrategy == null) { 103 parameterMappingStrategy = createParameterMappingStrategy(); 104 } 105 return parameterMappingStrategy; 106 } 107 108 public void setParameterMappingStrategy(ParameterMappingStrategy parameterMappingStrategy) { 109 this.parameterMappingStrategy = parameterMappingStrategy; 110 } 111 112 // Implementation methods 113 //------------------------------------------------------------------------- 114 protected BeanInfo createBeanInfo() { 115 return new BeanInfo(context, bean.getClass(), getParameterMappingStrategy()); 116 } 117 118 protected ParameterMappingStrategy createParameterMappingStrategy() { 119 return BeanInfo.createParameterMappingStrategy(context); 120 } 121 122 protected Object lookupBean() throws Exception { 123 return registry.lookup(name); 124 } 125 }