001 /* FileView.java -- 002 Copyright (C) 2002, 2004, 2005, 2006, Free Software Foundation, Inc. 003 004 This file is part of GNU Classpath. 005 006 GNU Classpath is free software; you can redistribute it and/or modify 007 it under the terms of the GNU General Public License as published by 008 the Free Software Foundation; either version 2, or (at your option) 009 any later version. 010 011 GNU Classpath is distributed in the hope that it will be useful, but 012 WITHOUT ANY WARRANTY; without even the implied warranty of 013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 General Public License for more details. 015 016 You should have received a copy of the GNU General Public License 017 along with GNU Classpath; see the file COPYING. If not, write to the 018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 019 02110-1301 USA. 020 021 Linking this library statically or dynamically with other modules is 022 making a combined work based on this library. Thus, the terms and 023 conditions of the GNU General Public License cover the whole 024 combination. 025 026 As a special exception, the copyright holders of this library give you 027 permission to link this library with independent modules to produce an 028 executable, regardless of the license terms of these independent 029 modules, and to copy and distribute the resulting executable under 030 terms of your choice, provided that you also meet, for each linked 031 independent module, the terms and conditions of the license of that 032 module. An independent module is a module which is not derived from 033 or based on this library. If you modify this library, you may extend 034 this exception to your version of the library, but you are not 035 obligated to do so. If you do not wish to do so, delete this 036 exception statement from your version. */ 037 038 039 package javax.swing.filechooser; 040 041 import java.io.File; 042 043 import javax.swing.Icon; 044 045 /** 046 * An abstract class that provides presentation information about files and 047 * directories. . 048 * 049 * @author Andrew Selkirk 050 */ 051 public abstract class FileView 052 { 053 054 /** 055 * Creates a new <code>FileView</code> instance. 056 */ 057 public FileView() 058 { 059 // Nothing to do here. 060 } 061 062 /** 063 * Returns the name for the specified file. This method always returns 064 * <code>null</code> and should be overridden by subclasses. 065 * 066 * @param file the file. 067 * 068 * @return Always <code>null</code>. 069 */ 070 public String getName(File file) 071 { 072 return null; 073 } 074 075 /** 076 * Returns a description for the specified file. This method always returns 077 * <code>null</code> and should be overridden by subclasses. 078 * 079 * @param file the file. 080 * 081 * @return Always <code>null</code>. 082 */ 083 public String getDescription(File file) 084 { 085 return null; 086 } 087 088 /** 089 * Returns a description for the type of the specified file. This method 090 * always returns <code>null</code> and should be overridden by subclasses. 091 * 092 * @param file the file. 093 * 094 * @return Always <code>null</code>. 095 */ 096 public String getTypeDescription(File file) 097 { 098 return null; 099 } 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 * @return Always <code>null</code>. 122 */ 123 public Boolean isTraversable(File directory) 124 { 125 return null; 126 } 127 128 }