| /** |
| * 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.camel.component.bean; |
| |
| import org.apache.camel.CamelContext; |
| import org.apache.camel.NoSuchBeanException; |
| import org.apache.camel.Processor; |
| import org.apache.camel.spi.Registry; |
| import org.apache.camel.util.CamelContextHelper; |
| import org.apache.camel.util.ObjectHelper; |
| |
| /** |
| * An implementation of a {@link BeanHolder} which will look up a bean from the registry and act as a cache of its metadata |
| * |
| * @version |
| */ |
| public class RegistryBean implements BeanHolder { |
| private final CamelContext context; |
| private final String name; |
| private final Registry registry; |
| private Processor processor; |
| private BeanInfo beanInfo; |
| private Object bean; |
| private ParameterMappingStrategy parameterMappingStrategy; |
| |
| public RegistryBean(CamelContext context, String name) { |
| this.context = context; |
| this.name = name; |
| this.registry = context.getRegistry(); |
| } |
| |
| public RegistryBean(Registry registry, CamelContext context, String name) { |
| this.registry = registry; |
| this.context = context; |
| this.name = name; |
| } |
| |
| @Override |
| public String toString() { |
| return "bean: " + name; |
| } |
| |
| public ConstantBeanHolder createCacheHolder() throws Exception { |
| return new ConstantBeanHolder(getBean(), getBeanInfo()); |
| } |
| |
| public Object getBean() throws NoSuchBeanException { |
| Object value = lookupBean(); |
| if (value == null) { |
| // maybe its a class |
| value = context.getClassResolver().resolveClass(name); |
| if (value == null) { |
| // no its not a class then we cannot find the bean |
| throw new NoSuchBeanException(name); |
| } |
| } |
| if (value != bean) { |
| if (!ObjectHelper.equal(ObjectHelper.type(bean), ObjectHelper.type(value))) { |
| beanInfo = null; |
| } |
| bean = value; |
| processor = null; |
| |
| // could be a class then create an instance of it |
| if (bean instanceof Class) { |
| // bean is a class so create an instance of it |
| bean = context.getInjector().newInstance((Class<?>)bean); |
| value = bean; |
| } |
| } |
| return value; |
| } |
| |
| public Processor getProcessor() { |
| if (processor == null && bean != null) { |
| processor = CamelContextHelper.convertTo(context, Processor.class, bean); |
| } |
| return processor; |
| } |
| |
| public BeanInfo getBeanInfo() { |
| if (beanInfo == null && bean != null) { |
| this.beanInfo = createBeanInfo(); |
| } |
| return beanInfo; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| public Registry getRegistry() { |
| return registry; |
| } |
| |
| public CamelContext getContext() { |
| return context; |
| } |
| |
| public ParameterMappingStrategy getParameterMappingStrategy() { |
| if (parameterMappingStrategy == null) { |
| parameterMappingStrategy = createParameterMappingStrategy(); |
| } |
| return parameterMappingStrategy; |
| } |
| |
| public void setParameterMappingStrategy(ParameterMappingStrategy parameterMappingStrategy) { |
| this.parameterMappingStrategy = parameterMappingStrategy; |
| } |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| protected BeanInfo createBeanInfo() { |
| return new BeanInfo(context, bean.getClass(), getParameterMappingStrategy()); |
| } |
| |
| protected ParameterMappingStrategy createParameterMappingStrategy() { |
| return BeanInfo.createParameterMappingStrategy(context); |
| } |
| |
| protected Object lookupBean() { |
| return registry.lookup(name); |
| } |
| } |