/*
    * Copyright (c) 2003 by Atlassian Software Systems Pty. Ltd.
    * All rights reserved.
    */
   package com.atlassian.plugin.util.zip;
   
   import org.apache.commons.lang.StringUtils;
   import org.slf4j.Logger;
   import org.slf4j.LoggerFactory;
  
  import java.io.BufferedInputStream;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.util.zip.ZipEntry;
  
  public class FileUnzipper extends AbstractUnzipper {
      private static final Logger log = LoggerFactory.getLogger(FileUnzipper.class);
  
      private File zipFile;
      private File destDir;
  
      public FileUnzipper(File zipFile, File destDir) {
          this.zipFile = zipFile;
          this.destDir = destDir;
      }
  
      /**
       * Unzips all files in the archive
       *
       * @throws Exception
       */
      public void unzip() throws IOException {
          if ((zipFile == null) || !zipFile.isFile())
              return;
  
          getStreamUnzipper().unzip();
      }
  
      public ZipEntry[] entries() throws IOException {
          return getStreamUnzipper().entries();
      }
  
      /**
       * Specify a specific file inside the archive to extract
       *
       * @param fileName
       */
      public File unzipFileInArchive(String fileName) throws IOException {
          File result = null;
  
          if ((zipFile == null) || !zipFile.isFile() || !StringUtils.isNotEmpty(fileName))
              return result;
  
          result = getStreamUnzipper().unzipFileInArchive(fileName);
  
          if (result == null)
              log.error("The file: " + fileName + " could not be found in the archive: " + zipFile.getAbsolutePath());
  
          return result;
      }
  
      private StreamUnzipper getStreamUnzipper() throws FileNotFoundException {
          return new StreamUnzipper(new BufferedInputStream(new FileInputStream(zipFile)), destDir);
      }
  
  }