Android Open Source - ePUB-Converter Write Zip

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
Copyright (C)2011 Ezio Querini/*from   w  w w .  j a va 2s .c o m*/

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.srsahu.epubconverter;

import java.io.File;
import java.io.FileOutputStream;
import java.util.zip.CRC32;
import java.util.zip.ZipEntry;
import java.util.zip.ZipException;
import java.util.zip.ZipOutputStream;

public class WriteZip {
  static ZipOutputStream zipOut = null;
  static final int BUFFER = 1024;
  static byte data[] = new byte[BUFFER];

  // Create file
  static boolean create(String filename) {
    try {
      zipOut = new ZipOutputStream(new FileOutputStream(new File(filename)));
    }
    catch (Exception e) {
      System.err.println("Failed to open zip file" + e.getMessage());
      return true;
    }
    return false;
  }

  // Add text entry
  static boolean addText(String filename, String text, boolean store) {
    CRC32 crc32 = new CRC32();
    byte[] data = text.getBytes();

    try {
      ZipEntry zipEntry = new ZipEntry(filename);
      zipOut.setMethod(ZipOutputStream.DEFLATED);
      if (store) {
        zipOut.setMethod(ZipOutputStream.STORED);
        zipEntry.setSize((long) data.length);
        crc32.reset();
        crc32.update(data);
        zipEntry.setCrc(crc32.getValue());
      }

      zipOut.putNextEntry(zipEntry);
      zipOut.write(data);
      zipOut.closeEntry();
    }
    catch (Exception e) {
      System.err.println("Failed to add textfile to zip" + e.getMessage());
      return true;
    }
    return false;
  }

  // Add image entry
  static boolean addImage(String filename, byte[] image) {
    try {
      ZipEntry zipEntry = new ZipEntry(filename);
      zipOut.setMethod(ZipOutputStream.DEFLATED);
      zipOut.putNextEntry(zipEntry);
      zipOut.write(image);
      zipOut.closeEntry();
    }
    catch (ZipException e) {
      return !e.getMessage().startsWith("Entry already exists");
    }
    catch (Exception e) {
      return true;
    }
    return false;
  }

  // Close file
  static boolean close() {
    try {
      zipOut.flush();
      zipOut.close();
    }
    catch (Exception e) {
      System.err.println("Failed to close zip file" + e.getMessage());
      return true;
    }
    return false;
  }
}

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