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 java.io.File;
020    import java.io.IOException;
021    import java.io.Serializable;
022    
023    import org.apache.camel.Exchange;
024    import org.apache.camel.NoTypeConversionAvailableException;
025    import org.apache.camel.util.IOHelper;
026    
027    /**
028     * File binding with the {@link java.io.File} type.
029     */
030    public class FileBinding implements GenericFileBinding<File>, Serializable {
031    
032        private File body;
033        private byte[] content;
034    
035        public Object getBody(GenericFile<File> file) {
036            // if file content has been loaded then return it
037            if (content != null) {
038                return content;
039            }
040            
041            // as we use java.io.File itself as the body (not loading its content into a OutputStream etc.)
042            // we just store a java.io.File handle to the actual file denoted by the
043            // file.getAbsoluteFilePath. We must do this as the original file consumed can be renamed before
044            // being processed (preMove) and thus it points to an invalid file location.
045            // GenericFile#getAbsoluteFilePath() is always up-to-date and thus we use it to create a file
046            // handle that is correct
047            if (body == null || !file.getAbsoluteFilePath().equals(body.getAbsolutePath())) {
048                body = new File(file.getAbsoluteFilePath());
049            }
050            return body;
051        }
052    
053        public void setBody(GenericFile<File> file, Object body) {
054            // noop
055        }
056    
057        public void loadContent(Exchange exchange, GenericFile<File> file) throws IOException {
058            try {
059                content = exchange.getContext().getTypeConverter().mandatoryConvertTo(byte[].class, file.getFile());
060            } catch (NoTypeConversionAvailableException e) {
061                throw IOHelper.createIOException("Cannot load file content: " + file.getAbsoluteFilePath(), e);
062            }
063        }
064    
065    }