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 }