org.codelabor.system.file.util.UploadUtils.java Source code

Introduction

Here is the source code for org.codelabor.system.file.util.UploadUtils.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.codelabor.system.file.util;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.nio.channels.WritableByteChannel;
import java.util.List;

import javax.servlet.ServletException;

import org.apache.commons.io.FileUtils;
import org.apache.commons.lang.StringUtils;
import org.codelabor.system.file.RepositoryType;
import org.codelabor.system.file.dto.FileDTO;
import org.codelabor.system.mime.util.TikaMimeDetectUtils;
import org.codelabor.system.util.ChannelUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *  
 * 
 * @author Shin Sang-jae
 * 
 */
public class UploadUtils {
    /**
     * 
     */
    public static final Logger logger = LoggerFactory.getLogger(UploadUtils.class);

    /**
     * ?? .</br> ?  ?? FILE_SYSTEM? , ??  DATABASE?  byte[]
     *  DTO? .
     * 
     * @param repositoryType
     *            ?  ?
     * @param inputStream
     *             
     * @param fileDTOList
     *            ? DTO List
     * @throws Exception
     *             
     */
    static public void processFile(RepositoryType repositoryType, InputStream inputStream,
            List<FileDTO> fileDTOList) throws Exception {
        for (int i = 0; i < fileDTOList.size(); i++) {
            FileDTO tempFileDTO = fileDTOList.get(i);
            processFile(repositoryType, inputStream, tempFileDTO);
            fileDTOList.add(i, tempFileDTO);
        }
    }

    /**
     * ?? .</br> ?  ?? FILE_SYSTEM? , ??  DATABASE?  byte[]
     *  DTO? .
     * 
     * @param repositoryType
     *            ?  ?
     * @param inputStream
     *             
     * @param fileDTO
     *            ? DTO
     * @throws Exception
     *             
     */
    static public void processFile(RepositoryType repositoryType, InputStream inputStream, FileDTO fileDTO)
            throws Exception {
        // prepare io
        OutputStream outputStream = null;
        ReadableByteChannel inputChannel = null;
        WritableByteChannel outputChannel = null;

        int fileSize = 0;

        switch (repositoryType) {
        case FILE_SYSTEM:
            // prepare repository
            File repository = new File(fileDTO.getRepositoryPath());
            String repositoryPath = fileDTO.getRepositoryPath();
            StringBuilder sb = new StringBuilder();
            if (logger.isDebugEnabled()) {
                sb.append("repositoryPath: ").append(repositoryPath);
                sb.append(", repositoryType: ").append(repositoryType);
                sb.append(", repository.exists(): ").append(repository.exists());
                sb.append(", repository.isDirectory(): ").append(repository.isDirectory());
                logger.debug(sb.toString());
            }

            // prepare directory
            File file = new File(repositoryPath);
            if (!file.exists()) {
                try {
                    FileUtils.forceMkdir(file);
                } catch (IOException e) {
                    StringBuilder sb = new StringBuilder();
                    sb.append("Cannot make directory: ");
                    sb.append(file.toString());
                    logger.error(sb.toString());
                    throw new ServletException(sb.toString());
                }
            }

            // prepare stream
            sb.setLength(0);
            sb.append(fileDTO.getRepositoryPath());
            if (!fileDTO.getRepositoryPath().endsWith(File.separator)) {
                sb.append(File.separator);
            }
            sb.append(fileDTO.getUniqueFilename());
            String filename = sb.toString();
            outputStream = new FileOutputStream(filename);
            logger.debug("filename: {}", filename);

            // copy channel
            inputChannel = Channels.newChannel(inputStream);
            outputChannel = Channels.newChannel(outputStream);
            fileSize = ChannelUtils.copy(inputChannel, outputChannel);

            // set vo
            if (StringUtils.isEmpty(fileDTO.getContentType())) {
                fileDTO.setContentType(TikaMimeDetectUtils.getMimeType(filename));
            }
            break;
        case DATABASE:
            // prepare steam
            outputStream = new ByteArrayOutputStream();

            // copy channel
            inputChannel = Channels.newChannel(inputStream);
            outputChannel = Channels.newChannel(outputStream);
            fileSize = ChannelUtils.copy(inputChannel, outputChannel);

            // set vo
            byte[] bytes = ((ByteArrayOutputStream) outputStream).toByteArray();
            fileDTO.setBytes(bytes);
            fileDTO.setRepositoryPath(null);
            if (StringUtils.isEmpty(fileDTO.getContentType())) {
                fileDTO.setContentType(TikaMimeDetectUtils.getMimeType(bytes));
            }
            break;
        }
        fileDTO.setFileSize(fileSize);

        // close io
        inputChannel.close();
        outputChannel.close();
        inputStream.close();
        outputStream.close();
    }
}