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 */ 017package org.apache.camel.component.bean; 018 019import org.apache.camel.CamelContext; 020import org.apache.camel.Processor; 021import org.apache.camel.util.ObjectHelper; 022 023/** 024 * A constant (singleton) bean implementation of {@link org.apache.camel.component.bean.BeanTypeHolder} 025 * 026 * @version 027 */ 028public class ConstantTypeBeanHolder implements BeanTypeHolder { 029 private final Class<?> type; 030 private final BeanInfo beanInfo; 031 032 public ConstantTypeBeanHolder(Class<?> type, BeanInfo beanInfo) { 033 ObjectHelper.notNull(type, "type"); 034 ObjectHelper.notNull(beanInfo, "beanInfo"); 035 036 this.type = type; 037 this.beanInfo = beanInfo; 038 } 039 040 public ConstantTypeBeanHolder(Class<?> type, CamelContext context) { 041 this(type, new BeanInfo(context, type)); 042 } 043 044 public ConstantTypeBeanHolder(Class<?> type, CamelContext context, ParameterMappingStrategy parameterMappingStrategy) { 045 this(type, new BeanInfo(context, type, parameterMappingStrategy)); 046 } 047 048 /** 049 * Creates a cached and constant {@link org.apache.camel.component.bean.BeanHolder} from this holder. 050 * 051 * @return a new {@link org.apache.camel.component.bean.BeanHolder} that has cached the lookup of the bean. 052 */ 053 public ConstantBeanHolder createCacheHolder() throws Exception { 054 Object bean = getBean(); 055 return new ConstantBeanHolder(bean, beanInfo); 056 } 057 058 @Override 059 public String toString() { 060 return type.toString(); 061 } 062 063 public Object getBean() { 064 // only create a bean if we have constructors 065 if (beanInfo.hasPublicConstructors()) { 066 return getBeanInfo().getCamelContext().getInjector().newInstance(type); 067 } else { 068 return null; 069 } 070 } 071 072 public Processor getProcessor() { 073 return null; 074 } 075 076 public boolean supportProcessor() { 077 return false; 078 } 079 080 public BeanInfo getBeanInfo() { 081 return beanInfo; 082 } 083 084 public BeanInfo getBeanInfo(Object bean) { 085 return null; 086 } 087 088 public Class<?> getType() { 089 return type; 090 } 091 092}