package some.package;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

/**
  * This class contains static methods that perform 
operations on files
  * Due to limitations of File objects across NFS mounted 
filesystems
  * this class provides a workaround
  *
  */

public final class FileUtils
{
  /** Private constructor to prevent instantiation.
    * All of the methods of this class are static.
    */
  private FileUtils()
  {
    //prevent instantiation;
  }

  /** Copy a File
    * The renameTo method does not allow action across NFS 
mounted filesystems
    * this method is the workaround
    *
    * @param fromFile The existing File
    * @param toFile The new File
     * @return  <code>true</code> if and only if the renaming 
succeeded;
     *          <code>false</code> otherwise
    */
  public final static boolean copy (File fromFile, File toFile)
  {
    try
    {
      FileInputStream in = new FileInputStream(fromFile);
      FileOutputStream out = new FileOutputStream(toFile);
      BufferedInputStream inBuffer = new BufferedInputStream
(in);
      BufferedOutputStream outBuffer = new 
BufferedOutputStream(out);

      int theByte = 0;

      while ((theByte = inBuffer.read()) > -1)
      {
        outBuffer.write(theByte);
      }

      outBuffer.close();
      inBuffer.close();
      out.close();
      in.close();

      // cleanupif files are not the same length
      if (fromFile.length() != toFile.length())
      {
        toFile.delete();
        
        return false;
      }
      
      return true;
    }
    catch (IOException e)
    {
      return false;
    }
  }

  /** Move a File
    * The renameTo method does not allow action across NFS 
mounted filesystems
    * this method is the workaround
    *
    * @param fromFile The existing File
    * @param toFile The new File
     * @return  <code>true</code> if and only if the renaming 
succeeded;
     *          <code>false</code> otherwise
    */
  public final static boolean move (File fromFile, File toFile)
  {
    if(fromFile.renameTo(toFile))
    {
      return true;
    }

    // delete if copy was successful, otherwise move will fail
    if (copy(fromFile, toFile))
    {
      return fromFile.delete();
    }

    return false;
  }
}


http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4073756

이 저작물은 크리에이티브 커먼즈 코리아 저작자표시-비영리-변경금지 2.0 대한민국 라이센스에 따라 이용하실 수 있습니다.

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