Source for java.awt.datatransfer.SystemFlavorMap

   1: /* SystemFlavorMap.java -- Maps between native flavor names and MIME types.
   2:    Copyright (C) 2001, 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: 
  39: package java.awt.datatransfer;
  40: 
  41: import java.util.HashMap;
  42: import java.util.List;
  43: import java.util.Map;
  44: 
  45: /**
  46:   * This class maps between native platform type names and DataFlavors.
  47:   *
  48:   * XXX - The current implementation does no mapping at all.
  49:   *
  50:   * @author Mark Wielaard (mark@klomp.org)
  51:   *
  52:   * @since 1.2
  53:   */
  54: public final class SystemFlavorMap implements FlavorMap, FlavorTable
  55: {
  56:   /**
  57:    * The default (instance) flavor map.
  58:    */
  59:   private static FlavorMap defaultFlavorMap;
  60: 
  61:   /**
  62:    * Private constructor.
  63:    */
  64:   private SystemFlavorMap ()
  65:   {
  66:   }
  67: 
  68:   /**
  69:    * Maps the specified <code>DataFlavor</code> objects to the native
  70:    * data type name.  The returned <code>Map</code> has keys that are
  71:    * the data flavors and values that are strings.  The returned map
  72:    * may be modified.  This can be useful for implementing nested mappings.
  73:    *
  74:    * @param flavors An array of data flavors to map
  75:    *                or null for all data flavors.
  76:    *
  77:    * @return A <code>Map</code> of native data types to data flavors.
  78:    */
  79:   public Map getNativesForFlavors (DataFlavor[] flavors)
  80:   {
  81:     return new HashMap();
  82:   }
  83: 
  84:   /**
  85:    * Maps the specified native type names to <code>DataFlavor</code>'s.
  86:    * The returned <code>Map</code> has keys that are strings and values
  87:    * that are <code>DataFlavor</code>'s.  The returned map may be
  88:    * modified.  This can be useful for implementing nested mappings.
  89:    *
  90:    * @param natives An array of native types to map
  91:    *                or null for all native types.
  92:    *
  93:    * @return A <code>Map</code> of data flavors to native type names.
  94:    */
  95:   public Map getFlavorsForNatives (String[] natives)
  96:   { 
  97:     return new HashMap();
  98:   }
  99: 
 100:   /**
 101:    * Returns the default (instance) (System)FlavorMap.
 102:    */
 103:   public static FlavorMap getDefaultFlavorMap ()
 104:   {
 105:     if (defaultFlavorMap == null)
 106:       defaultFlavorMap = new SystemFlavorMap ();
 107: 
 108:     return defaultFlavorMap;
 109:   }
 110: 
 111:   /**
 112:    * Returns the native type name for the given java mime type.
 113:    */
 114:   public static String encodeJavaMIMEType (String mime)
 115:   {
 116:     return null;
 117:   }
 118: 
 119:   /**
 120:    * Returns the native type name for the given data flavor.
 121:    */
 122:   public static String encodeDataFlavor (DataFlavor df)
 123:   {
 124:     return null;
 125:   }
 126: 
 127:   /**
 128:    * Returns true if the native type name can be represented as
 129:    * a java mime type.
 130:    */
 131:   public static boolean isJavaMIMEType (String name)
 132:   {
 133:     return false;
 134:   }
 135: 
 136:   /**
 137:    * Returns the java mime type for the given the native type name.
 138:    */
 139:   public static String decodeJavaMIMEType (String name)
 140:   {
 141:     return null;
 142:   }
 143: 
 144:   /**
 145:    * Returns the data flavor given the native type name
 146:    * or null when no such data flavor exists.
 147:    */
 148:   public static DataFlavor decodeDataFlavor (String name)
 149:     throws ClassNotFoundException
 150:   {
 151:     String javaMIMEType = decodeJavaMIMEType (name);
 152:     
 153:     if (javaMIMEType != null)
 154:       return new DataFlavor (javaMIMEType);
 155:     else
 156:       return null;
 157:   }
 158: 
 159:   public List getFlavorsForNative (String nat)
 160:   {
 161:     throw new Error ("Not implemented");
 162:   }
 163: 
 164:   public List getNativesForFlavor (DataFlavor flav)
 165:   {
 166:     throw new Error ("Not implemented");
 167:   }
 168: 
 169: } // class SystemFlavorMap