ekit/com/hexidec/ekit/component/MutableFilter.java

   1 /*
   2 GNU Lesser General Public License
   3
   4 MutableFilter
   5 Copyright (C) 2000-2003 Howard Kistler
   6
   7 This library is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU Lesser General Public
   9 License as published by the Free Software Foundation; either
  10 version 2.1 of the License, or (at your option) any later version.
  11
  12 This library is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 Lesser General Public License for more details.
  16
  17 You should have received a copy of the GNU Lesser General Public
  18 License along with this library; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 */
  21
  22 package com.hexidec.ekit.component;
  23
  24 import java.io.File;
  25 import javax.swing.filechooser.FileFilter;
  26
  27 /** Class for providing JFileChooser with a FileFilter
  28   */
  29 public class MutableFilter extends FileFilter
  30 {
  31         private String[] acceptableExtensions;
  32         private String descriptor;
  33
  34         public MutableFilter(String[] exts, String desc)
  35         {
  36                 acceptableExtensions = exts;
  37                 StringBuffer strbDesc = new StringBuffer(desc + " (");
  38                 for(int i = 0; i < acceptableExtensions.length; i++)
  39                 {
  40                         if(i > 0) { strbDesc.append(", "); }
  41                         strbDesc.append("*." + acceptableExtensions[i]);
  42                 }
  43                 strbDesc.append(")");
  44                 descriptor = strbDesc.toString();
  45         }
  46
  47         public boolean accept(File file)
  48         {
  49                 if(file.isDirectory())
  50                 {
  51                         return true;
  52                 }
  53                 String fileName = file.getName();
  54                 String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1, fileName.length()).toLowerCase();
  55                 if(fileExt != null)
  56                 {
  57                         for(int i = 0; i < acceptableExtensions.length; i++)
  58                         {
  59                                 if(fileExt.equals(acceptableExtensions[i]))
  60                                 {
  61                                         return true;
  62                                 }
  63                         }
  64                         return false;
  65                 }
  66                 else
  67                 {
  68                         return false;
  69                 }
  70         }
  71
  72         public String getDescription()
  73         {
  74                 return descriptor;
  75         }
  76 }
  77