/*

  * Copyright (c) 2003-2011, Simon Brown

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *   - Redistributions of source code must retain the above copyright

  *     notice, this list of conditions and the following disclaimer.

  *

  *   - Redistributions in binary form must reproduce the above copyright

  *     notice, this list of conditions and the following disclaimer in

  *     the documentation and/or other materials provided with the

  *     distribution.

  *

  *   - Neither the name of Pebble 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 OWNER 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.

  */

 package net.sourceforge.pebble.web.view;

 import net.sourceforge.pebble.domain.FileMetaData;

 import javax.servlet.ServletContext;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import java.io.BufferedOutputStream;

 import java.io.FileInputStream;

 import java.io.IOException;

 import java.util.Iterator;

 import java.util.List;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipOutputStream;

 /**

  * Represents a binary view component and prepares the model for display.

  *

  * @author    Simon Brown

  */

 public class ZipView extends BinaryView {

   private List files;

   private String filename;

   public ZipView(List files, String filename) {

     this.files = files;

     this.filename = filename;

   }

   /**

    * Gets the title of this view.

    *

    * @return the title as a String

    */

   public String getContentType() {

     return "application/zip";

   }

   public long getContentLength() {

     return 0;

   }

   /**

    * Dispatches this view.

    *

    * @param request  the HttpServletRequest instance

    * @param response the HttpServletResponse instance

    * @param context

    */

   public void dispatch(HttpServletRequest request, HttpServletResponse response, ServletContext context) throws ServletException {

     try {

       response.setHeader("Content-Disposition", "filename=" + filename);

       byte[] buf = new byte[1024];

       ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));

       Iterator it = files.iterator();

       while (it.hasNext()) {

         FileMetaData file = (FileMetaData)it.next();

         if (file.isDirectory()) {

           continue;

         }

         FileInputStream in = new FileInputStream(file.getFile());

         out.putNextEntry(new ZipEntry(file.getAbsolutePath().substring(1)));

         int len;

         while ((len = in.read(buf)) > 0) {

           out.write(buf, 0, len);

         }

         out.closeEntry();

         in.close();

       }

       out.close();

     } catch (IOException ioe) {

       throw new ServletException(ioe);

     }

   }

 }