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
041 GenericFile file = (GenericFile) value;
042 Class from = file.getBody().getClass();
043
044 // maybe from is already the type we want
045 if (from.isAssignableFrom(type)) {
046 return file.getBody();
047 }
048
049 // no then try to lookup a type converter
050 TypeConverter tc = registry.lookup(type, from);
051 if (tc != null) {
052 Object body = file.getBody();
053 return tc.convertTo(type, exchange, body);
054 }
055 }
056
057 return null;
058 }
059
060 @Converter
061 public static String convertToString(GenericFile file, Exchange exchange) {
062 if (exchange != null) {
063 return exchange.getContext().getTypeConverter().convertTo(String.class, file.getBody());
064 } else {
065 // should revert to fallback converter if we dont have an exchange
066 return null;
067 }
068 }
069
070 }