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.impl.converter; 018 019 import java.lang.reflect.Method; 020 021 import org.apache.camel.RuntimeCamelException; 022 import org.apache.camel.TypeConverter; 023 import org.apache.camel.util.ObjectHelper; 024 025 /** 026 * A {@link TypeConverter} implementation which instantiates an object 027 * so that an instance method can be used as a type converter 028 * 029 * @version $Revision: 37863 $ 030 */ 031 public class InstanceMethodTypeConverter implements TypeConverter { 032 private final CachingInjector injector; 033 private final Method method; 034 035 public InstanceMethodTypeConverter(CachingInjector injector, Method method) { 036 this.injector = injector; 037 this.method = method; 038 } 039 040 @Override 041 public String toString() { 042 return "InstanceMethodTypeConverter: " + method; 043 } 044 045 public synchronized <T> T convertTo(Class<T> type, Object value) { 046 Object instance = injector.newInstance(); 047 if (instance == null) { 048 throw new RuntimeCamelException("Could not instantiate an instance of: " + type.getName()); 049 } 050 return (T) ObjectHelper.invokeMethod(method, instance, value); 051 } 052 }