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.util.concurrent.Future;
020    
021    import org.apache.camel.Exchange;
022    import org.apache.camel.Message;
023    import org.apache.camel.TypeConverter;
024    import org.apache.camel.component.bean.BeanInvocation;
025    import org.apache.camel.component.file.GenericFile;
026    
027    /**
028     * A simple converter that can convert any object to a String type by using the
029     * toString() method of the object.
030     *
031     * @version $Revision: 828677 $
032     */
033    public class ToStringTypeConverter implements TypeConverter {
034    
035        @SuppressWarnings("unchecked")
036        public <T> T convertTo(Class<T> toType, Object value) {
037            if (value != null) {
038    
039                // should not try to convert Message
040                if (Message.class.isAssignableFrom(value.getClass())) {
041                    return (T) Void.TYPE;
042                }
043    
044                // should not try to convert future
045                if (Future.class.isAssignableFrom(value.getClass())) {
046                    return (T) Void.TYPE;
047                }
048    
049                // should not try to convert bean invocations
050                if (BeanInvocation.class.isAssignableFrom(value.getClass())) {
051                    return (T) Void.TYPE;
052                }
053    
054                // should not try to convert files
055                if (GenericFile.class.isAssignableFrom(value.getClass())) {
056                    return (T) Void.TYPE;
057                }
058    
059                if (toType.equals(String.class)) {
060                    return (T)value.toString();
061                }
062            }
063            return null;
064        }
065    
066        public <T> T convertTo(Class<T> type, Exchange exchange, Object value) {
067            return convertTo(type, value);
068        }
069    
070        public <T> T mandatoryConvertTo(Class<T> type, Object value) {
071            return convertTo(type, value);
072        }
073    
074        public <T> T mandatoryConvertTo(Class<T> type, Exchange exchange, Object value) {
075            return convertTo(type, value);
076        }
077    
078    }