imagefilter.java

nesC写的heed算法

/*
 * "Copyright (c) 2000-2003 The Regents of the University  of California.  
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose, without fee, and without written agreement is
 * hereby granted, provided that the above copyright notice, the following
 * two paragraphs and the author appear in all copies of this software.
 * 
 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
 *
 * Copyright (c) 2002-2003 Intel Corporation
 * All rights reserved.
 *
 * This file is distributed under the terms in the attached INTEL-LICENSE     
 * file. If you do not find these files, copies can be found by writing to
 * Intel Research Berkeley, 2150 Shattuck Avenue, Suite 1300, Berkeley, CA, 
 * 94704.  Attention:  Intel License Inquiry.
 */


package net.tinyos.task.taskviz;

import java.io.File;
import javax.swing.*;
import javax.swing.filechooser.*;

/**
 * This class acts as a file filter, accepting only gif, jpg or tiff files or directories
 */
public class ImageFilter extends FileFilter {
    
    /**
      * This method returns whether the file has been accepted by the filter: all directories and all 
      * gif, jpg, or tiff files.
      *
      * @param f File to filter
      * @return whether the given file is a directory, gif, jpg, or tiff file
      */
    public boolean accept(File f) {
      if (f.isDirectory()) {
        return true;
      }

      String extension = Utils.getExtension(f);
      if (extension != null) {
        if (extension.equals(Utils.tiff) || extension.equals(Utils.tif) || extension.equals(Utils.gif) ||
          extension.equals(Utils.jpeg) || extension.equals(Utils.jpg) || extension.equals(Utils.png)) {
          return true;
        } 
        else {
          return false;
        }
      }
      return false;
    }

    /**
     * Returns a textual description of the filter
     *
     * @return Textual description of the filter    
     */
    public String getDescription() {
        return "Just Images";
    }
}