old-autovect-branch/libjava/classpath/javax/swing/filechooser/FileView.java

   1 /* FileView.java --
   2    Copyright (C) 2002, 2004, 2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package javax.swing.filechooser;
  40
  41 import java.io.File;
  42
  43 import javax.swing.Icon;
  44
  45 /**
  46  * An abstract class that provides presentation information about files and
  47  * directories.  .
  48  *
  49  * @author  Andrew Selkirk
  50  */
  51 public abstract class FileView
  52 {
  53
  54   /**
  55    * Creates a new <code>FileView</code> instance.
  56    */
  57   public FileView()
  58   {
  59     // Nothing to do here.
  60   }
  61
  62   /**
  63    * Returns the name for the specified file.  This method always returns
  64    * <code>null</code> and should be overridden by subclasses.
  65    *
  66    * @param file  the file.
  67    *
  68    * @return Always <code>null</code>.
  69    */
  70   public String getName(File file)
  71   {
  72     return null;
  73   }
  74
  75   /**
  76    * Returns a description for the specified file.  This method always returns
  77    * <code>null</code> and should be overridden by subclasses.
  78    *
  79    * @param file  the file.
  80    *
  81    * @return Always <code>null</code>.
  82    */
  83   public String getDescription(File file)
  84   {
  85     return null;
  86   }
  87
  88   /**
  89    * Returns a description for the type of the specified file.  This method
  90    * always returns <code>null</code> and should be overridden by subclasses.
  91    *
  92    * @param file  the file.
  93    *
  94    * @return Always <code>null</code>.
  95    */
  96   public String getTypeDescription(File file)
  97   {
  98     return null;
  99   }
 100
 101   /**
 102    * Returns an {@link Icon} to represent the specified file.  This method
 103    * always returns <code>null</code> and should be overridden by subclasses.
 104    *
 105    * @param file  the file.
 106    *
 107    * @return Always <code>null</code>.
 108    */
 109   public Icon getIcon(File file)
 110   {
 111     return null;
 112   }
 113
 114   /**
 115    * Returns {@link Boolean#TRUE} if the given directory is traversable, and
 116    * {@link Boolean#FALSE} if it is not.  This method always returns
 117    * <code>null</code> and should be overridden by subclasses.
 118    *
 119    * @param directory  the directory.
 120    *
 121    * @returns Always <code>null</code>.
 122    */
 123   public Boolean isTraversable(File directory)
 124   {
 125     return null;
 126   }
 127
 128 }