org.springframework.integration.http.FileCopyingMultipartFileReader.java Source code

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Here is the source code for org.springframework.integration.http.FileCopyingMultipartFileReader.java

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/*
 * Copyright 2002-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.integration.http;

import java.io.File;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.springframework.web.multipart.MultipartFile;

/**
 * {@link MultipartFileReader} implementation that copies the MulitpartFile's
 * content to a new temporary File in the specified directory. If no directory
 * is provided, the Files will be created in the default temporary directory.
 * 
 * @author Mark Fisher
 * @since 2.0
 */
public class FileCopyingMultipartFileReader implements MultipartFileReader<MultipartFile> {

    private static final Log logger = LogFactory.getLog(FileCopyingMultipartFileReader.class);

    private final File directory;

    private volatile String prefix = "si_";

    private volatile String suffix = ".tmp";

    /**
     * Create a {@link FileCopyingMultipartFileReader} that creates temporary
     * Files in the default temporary directory.
     */
    public FileCopyingMultipartFileReader() {
        this(null);
    }

    /**
     * Create a {@link FileCopyingMultipartFileReader} that creates temporary
     * Files in the given directory.
     */
    public FileCopyingMultipartFileReader(File directory) {
        this.directory = directory;
    }

    /**
     * Specify the prefix to use for temporary files.
     */
    public void setPrefix(String prefix) {
        this.prefix = prefix;
    }

    /**
     * Specify the suffix to use for temporary files.
     */
    public void setSuffix(String suffix) {
        this.suffix = suffix;
    }

    public MultipartFile readMultipartFile(MultipartFile multipartFile) throws IOException {
        File upload = File.createTempFile(this.prefix, this.suffix, this.directory);
        multipartFile.transferTo(upload);
        UploadedMultipartFile uploadedMultipartFile = new UploadedMultipartFile(upload, multipartFile.getSize(),
                multipartFile.getContentType(), multipartFile.getName(), multipartFile.getOriginalFilename());
        if (logger.isDebugEnabled()) {
            logger.debug("copied uploaded file [" + multipartFile.getOriginalFilename() + "] to ["
                    + upload.getAbsolutePath() + "]");
        }
        return uploadedMultipartFile;
    }

}