FileZipService.java

/*
 * Copyright (c) 2002-2017, Mairie de Paris
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice
 *     and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice
 *     and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *
 *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
 *     contributors may be used to endorse or promote products derived from
 *     this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * License 1.0
 */
package fr.paris.lutece.plugins.fileexport.service;

import fr.paris.lutece.portal.service.plugin.Plugin;
import fr.paris.lutece.portal.service.plugin.PluginService;
import fr.paris.lutece.portal.service.util.AppLogService;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import java.util.HashMap;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;


/**
 * The zip service will pack all the chosen files and create an archive
 */
public class FileZipService
{
    private static FileZipService _singleton;
    private static final String PARAM_PLUGIN_ID = "plugin_id";

    /**
     * Gets the unique instance of the PluginWizardZipService
     * @return The unique instance of the PluginWizardZipService
     */
    public static synchronized FileZipService getInstance(  )
    {
        if ( _singleton == null )
        {
            _singleton = new FileZipService(  );
        }

        return _singleton;
    }

    /**
     * Exports the files in a byte array
     * @param request The Http request
     * @return An array of byte which is the content of the archive
     */
    public byte[] exportZip( HttpServletRequest request )
    {
        ZipOutputStream zipOutputStream = null;
        ByteArrayOutputStream fos = new ByteArrayOutputStream(  );

        byte[] buffer = new byte[1024];

        zipOutputStream = new ZipOutputStream( fos );
        zipOutputStream.setLevel( 9 );



        return fos.toByteArray(  );
    }
}