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.Exchange;
022    import org.apache.camel.spi.TypeConverterRegistry;
023    import org.apache.camel.support.TypeConverterSupport;
024    import 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     */
032    public 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.getParameterTypes().length == 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    }