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 */
017package org.apache.camel.component.file;
018
019import java.io.File;
020import java.io.IOException;
021
022import org.apache.camel.Exchange;
023import org.apache.camel.NoTypeConversionAvailableException;
024
025/**
026 * File binding with the {@link java.io.File} type.
027 */
028public 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 an 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);
058            } catch (NoTypeConversionAvailableException e) {
059                throw new IOException("Cannot load file content: " + file.getAbsoluteFilePath(), e);
060            }
061        }
062    }
063}