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.TypeConverter;
023import org.apache.camel.support.TypeConverterSupport;
024import org.apache.camel.util.ObjectHelper;
025
026/**
027 * A {@link TypeConverter} implementation which invokes a static method to convert from a type to another type
028 *
029 * @version 
030 */
031public class StaticMethodTypeConverter extends TypeConverterSupport {
032    private final Method method;
033    private final boolean useExchange;
034    private final boolean allowNull;
035
036    @Deprecated
037    public StaticMethodTypeConverter(Method method) {
038        this(method,  false);
039    }
040
041    public StaticMethodTypeConverter(Method method, boolean allowNull) {
042        this.method = method;
043        this.useExchange = method.getParameterTypes().length == 2;
044        this.allowNull = allowNull;
045    }
046
047    @Override
048    public String toString() {
049        return "StaticMethodTypeConverter: " + method;
050    }
051
052    @Override
053    public boolean allowNull() {
054        return allowNull;
055    }
056
057    @SuppressWarnings("unchecked")
058    public <T> T convertTo(Class<T> type, Exchange exchange, Object value) {
059        return useExchange ? (T)ObjectHelper.invokeMethod(method, null, value, exchange)
060            : (T)ObjectHelper.invokeMethod(method, null, value);
061    }
062
063}