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.component.file;
018    
019    import org.apache.camel.Converter;
020    import org.apache.camel.Exchange;
021    import org.apache.camel.FallbackConverter;
022    import org.apache.camel.TypeConverter;
023    import org.apache.camel.spi.TypeConverterRegistry;
024    
025    /**
026     * A set of converter methods for working with generic file types
027     */
028    @Converter
029    public final class GenericFileConverter {
030    
031        private GenericFileConverter() {
032            // Helper Class
033        }
034    
035        @FallbackConverter
036        @SuppressWarnings("unchecked")
037        public static Object convertTo(Class<?> type, Exchange exchange, Object value, TypeConverterRegistry registry) {
038            // use a fallback type converter so we can convert the embedded body if the value is GenericFile
039            if (GenericFile.class.isAssignableFrom(value.getClass())) {
040                GenericFile file = (GenericFile) value;
041                Class from = file.getBody().getClass();
042    
043                // maybe from is already the type we want
044                if (from.isAssignableFrom(type)) {
045                    return file.getBody();
046                }
047                // no then try to lookup a type converter
048                TypeConverter tc = registry.lookup(type, from);
049                if (tc != null) {
050                    Object body = file.getBody();
051                    return tc.convertTo(type, exchange, body);
052                }
053            }
054            
055            return null;
056        }
057    
058    }