Source for javax.activation.FileDataSource

   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: }