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