libjava/classpath/javax/activation/FileDataSource.java

   1 /* FileDataSource.java -- Data source for a File object.
   2    Copyright (C) 2004 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 package javax.activation;
  39
  40 import java.io.File;
  41 import java.io.FileInputStream;
  42 import java.io.FileOutputStream;
  43 import java.io.InputStream;
  44 import java.io.IOException;
  45 import java.io.OutputStream;
  46
  47 /**
  48  * Data source encapsulating a file.
  49  *
  50  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  51  * @version 1.1
  52  */
  53 public class FileDataSource
  54   implements DataSource
  55 {
  56
  57   private final File file;
  58   private FileTypeMap typeMap;
  59
  60   /**
  61    * Constructor.
  62    * @param file the underlying file to use
  63    */
  64   public FileDataSource(File file)
  65   {
  66     this.file = file;
  67   }
  68
  69   /**
  70    * Constructor.
  71    * @param name the path to the underlying file to use
  72    */
  73   public FileDataSource(String name)
  74   {
  75     this(new File(name));
  76   }
  77
  78   public InputStream getInputStream()
  79     throws IOException
  80   {
  81     return new FileInputStream(file);
  82   }
  83
  84   public OutputStream getOutputStream()
  85     throws IOException
  86   {
  87     return new FileOutputStream(file);
  88   }
  89
  90   public String getContentType()
  91   {
  92     if (typeMap == null)
  93       {
  94         FileTypeMap dftm = FileTypeMap.getDefaultFileTypeMap();
  95         return dftm.getContentType(file);
  96       }
  97     return typeMap.getContentType(file);
  98   }
  99
 100   public String getName()
 101   {
 102     return file.getName();
 103   }
 104
 105   /**
 106    * Returns the underlying file.
 107    */
 108   public File getFile()
 109   {
 110     return file;
 111   }
 112
 113   /**
 114    * Sets the file type map to use to determine the content type of the file.
 115    * @param map the file type map
 116    */
 117   public void setFileTypeMap(FileTypeMap map)
 118   {
 119     typeMap = map;
 120   }
 121
 122 }
 123