| /** |
| * 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.impl.converter; |
| |
| import java.lang.reflect.Method; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.RuntimeCamelException; |
| import org.apache.camel.TypeConverter; |
| import org.apache.camel.spi.TypeConverterAware; |
| import org.apache.camel.spi.TypeConverterRegistry; |
| import org.apache.camel.util.ObjectHelper; |
| |
| /** |
| * A {@link TypeConverter} implementation which instantiates an object |
| * so that an instance method can be used as a type converter |
| * |
| * @version |
| */ |
| public class InstanceMethodTypeConverter implements TypeConverter { |
| private final CachingInjector<?>injector; |
| private final Method method; |
| private final boolean useExchange; |
| private final TypeConverterRegistry registry; |
| |
| public InstanceMethodTypeConverter(CachingInjector<?> injector, Method method, TypeConverterRegistry registry) { |
| this.injector = injector; |
| this.method = method; |
| this.useExchange = method.getParameterTypes().length == 2; |
| this.registry = registry; |
| } |
| |
| @Override |
| public String toString() { |
| return "InstanceMethodTypeConverter: " + method; |
| } |
| |
| public <T> T convertTo(Class<T> type, Object value) { |
| return convertTo(type, null, value); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T> T convertTo(Class<T> type, Exchange exchange, Object value) { |
| Object instance = injector.newInstance(); |
| if (instance == null) { |
| throw new RuntimeCamelException("Could not instantiate an instance of: " + type.getCanonicalName()); |
| } |
| // inject parent type converter |
| if (instance instanceof TypeConverterAware) { |
| if (registry instanceof TypeConverter) { |
| TypeConverter parentTypeConverter = (TypeConverter) registry; |
| ((TypeConverterAware) instance).setTypeConverter(parentTypeConverter); |
| } |
| } |
| return useExchange |
| ? (T)ObjectHelper.invokeMethod(method, instance, value, exchange) : (T)ObjectHelper |
| .invokeMethod(method, instance, value); |
| } |
| |
| public <T> T mandatoryConvertTo(Class<T> type, Object value) { |
| return convertTo(type, null, value); |
| } |
| |
| public <T> T mandatoryConvertTo(Class<T> type, Exchange exchange, Object value) { |
| return convertTo(type, null, value); |
| } |
| } |