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.impl.converter;
018
019import java.lang.reflect.Method;
020
021import org.apache.camel.Exchange;
022import org.apache.camel.spi.TypeConverterRegistry;
023import org.apache.camel.support.TypeConverterSupport;
024import org.apache.camel.util.ObjectHelper;
025
026/**
027 * A {@link org.apache.camel.TypeConverter} implementation which invokes a static method
028 * as a fallback type converter from a type to another type
029 *
030 * @version 
031 */
032public class StaticMethodFallbackTypeConverter extends TypeConverterSupport {
033    private final Method method;
034    private final boolean useExchange;
035    private final TypeConverterRegistry registry;
036    private final boolean allowNull;
037
038    @Deprecated
039    public StaticMethodFallbackTypeConverter(Method method, TypeConverterRegistry registry) {
040        this(method, registry, false);
041    }
042
043    public StaticMethodFallbackTypeConverter(Method method, TypeConverterRegistry registry, boolean allowNull) {
044        this.method = method;
045        this.useExchange = method.getParameterCount() == 4;
046        this.registry = registry;
047        this.allowNull = allowNull;
048    }
049
050    @Override
051    public boolean allowNull() {
052        return allowNull;
053    }
054
055    @Override
056    public String toString() {
057        return "StaticMethodFallbackTypeConverter: " + method;
058    }
059
060    @SuppressWarnings("unchecked")
061    public <T> T convertTo(Class<T> type, Exchange exchange, Object value) {
062        return useExchange ? (T)ObjectHelper.invokeMethod(method, null, type, exchange, value, registry)
063            : (T)ObjectHelper.invokeMethod(method, null, type, value, registry);
064    }
065
066}