001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.impl.converter; 019 020 import org.apache.camel.RuntimeCamelException; 021 import org.apache.camel.TypeConverter; 022 import org.apache.camel.util.ObjectHelper; 023 import org.apache.camel.impl.CachingInjector; 024 025 import java.lang.reflect.InvocationTargetException; 026 import java.lang.reflect.Method; 027 028 /** 029 * A {@link TypeConverter} implementation which instantiates an object 030 * so that an instance method can be used as a type converter 031 * 032 * @version $Revision: 525236 $ 033 */ 034 public class InstanceMethodTypeConverter implements TypeConverter { 035 private final CachingInjector injector; 036 private final Method method; 037 038 public InstanceMethodTypeConverter(CachingInjector injector, Method method) { 039 this.injector = injector; 040 this.method = method; 041 } 042 043 @Override 044 public String toString() { 045 return "InstanceMethodTypeConverter: " + method; 046 } 047 048 public synchronized <T> T convertTo(Class<T> type, Object value) { 049 Object instance = injector.newInstance(); 050 if (instance == null) { 051 throw new RuntimeCamelException("Could not instantiate aninstance of: " + type.getName()); 052 } 053 return (T) ObjectHelper.invokeMethod(method, instance, value); 054 } 055 }