old-autovect-branch/libjava/classpath/gnu/CORBA/DynAn/gnuDynEnum.java

   1 /* gnuDynEnum.java --
   2    Copyright (C) 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 gnu.CORBA.DynAn;
  40
  41 import gnu.CORBA.Unexpected;
  42
  43 import org.omg.CORBA.Any;
  44 import org.omg.CORBA.BAD_PARAM;
  45 import org.omg.CORBA.MARSHAL;
  46 import org.omg.CORBA.ORB;
  47 import org.omg.CORBA.TypeCode;
  48 import org.omg.CORBA.portable.InputStream;
  49 import org.omg.DynamicAny.DynAny;
  50 import org.omg.DynamicAny.DynAnyPackage.InvalidValue;
  51 import org.omg.DynamicAny.DynAnyPackage.TypeMismatch;
  52 import org.omg.DynamicAny.DynEnum;
  53
  54 import java.io.IOException;
  55
  56 import java.util.Arrays;
  57
  58 /**
  59  * Our implementation of dynamic enumeration.
  60  *
  61  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  62  */
  63 public class gnuDynEnum extends UndivideableAny implements DynEnum
  64 {
  65   /**
  66    * Use serialVersionUID for interoperability.
  67    */
  68   private static final long serialVersionUID = 1;
  69
  70   /**
  71    * The valid string values of the enumeration. Most of enumerations are short,
  72    * counting 2-5 memebers. With so small number of memebers, it seems not
  73    * reasonable to use hashtables.
  74    */
  75   final String[] values;
  76
  77   /**
  78    * The current value of enum.
  79    */
  80   int current;
  81
  82   /**
  83    * Create a new dyn enum from the given typecode.
  84    */
  85   public gnuDynEnum(TypeCode oType, TypeCode aType, gnuDynAnyFactory aFactory,
  86     ORB anOrb
  87   )
  88   {
  89     super(oType, aType, aFactory, anOrb);
  90     try
  91       {
  92         values = new String[ final_type.member_count() ];
  93
  94         for (int i = 0; i < values.length; i++)
  95           {
  96             values [ i ] = final_type.member_name(i);
  97           }
  98       }
  99     catch (Exception e)
 100       {
 101         throw new BAD_PARAM("Not enum");
 102       }
 103   }
 104
 105   /**
 106    * Create a clone of the given enum, sharing values and final_type.
 107    */
 108   public gnuDynEnum(gnuDynEnum from)
 109   {
 110     super(from.official_type, from.final_type, from.factory, from.orb);
 111     values = from.values;
 112   }
 113
 114   /**
 115    * Assign the Enum from the passed value. The passed DynAny must hold the
 116    * enumeration of exactly the same final_type.
 117    */
 118   public void assign(DynAny from) throws TypeMismatch
 119   {
 120     checkType(official_type, from.type());
 121     if (!(from instanceof DynEnum))
 122       throw new TypeMismatch("Not a DynEnum");
 123     try
 124       {
 125         set_as_ulong(((DynEnum) from).get_as_ulong());
 126       }
 127     catch (InvalidValue e)
 128       {
 129         TypeMismatch t = new TypeMismatch();
 130         t.initCause(e);
 131         throw t;
 132       }
 133   }
 134
 135   /**
 136    * Copy this DynEnum.
 137    */
 138   public DynAny copy()
 139   {
 140     gnuDynEnum other = new gnuDynEnum(this);
 141     other.current = current;
 142     return other;
 143   }
 144
 145   /**
 146    * Compares for equality.
 147    */
 148   public boolean equal(DynAny other)
 149   {
 150     if (other instanceof gnuDynEnum)
 151       {
 152         gnuDynEnum oe = (gnuDynEnum) other;
 153         return current == oe.current &&
 154         (oe.values == values || Arrays.equals(values, oe.values));
 155       }
 156     else if (other instanceof DynEnum)
 157       {
 158         DynEnum oe = (DynEnum) other;
 159         return current == oe.get_as_ulong() && official_type.equal(oe.type());
 160       }
 161     else
 162       return false;
 163   }
 164
 165   /**
 166    * Set value from any that must contain enumeration.
 167    */
 168   public void from_any(Any an_any) throws TypeMismatch, InvalidValue
 169   {
 170     checkType(official_type, an_any.type());
 171     try
 172       {
 173         InputStream in = an_any.create_input_stream();
 174         set_as_ulong(in.read_long());
 175         in.close();
 176       }
 177     catch (MARSHAL eof)
 178       {
 179         throw new InvalidValue();
 180       }
 181     catch (IOException ex)
 182       {
 183         throw new Unexpected(ex);
 184       }
 185   }
 186
 187   /**
 188    * Get the value of this enumeration as string.
 189    */
 190   public String get_as_string()
 191   {
 192     return values [ current ];
 193   }
 194
 195   /**
 196    * Get the value of this enumeration as int.
 197    */
 198   public int get_as_ulong()
 199   {
 200     return current;
 201   }
 202
 203   /**
 204    * Set the value of this enumeration as string.
 205    */
 206   public void set_as_string(String value) throws InvalidValue
 207   {
 208     for (int i = 0; i < values.length; i++)
 209       {
 210         if (values [ i ].equals(value))
 211           {
 212             current = i;
 213             valueChanged();
 214             return;
 215           }
 216       }
 217     throw new InvalidValue(value);
 218   }
 219
 220   /**
 221    * Set the value of this enumeration as int.
 222    */
 223   public void set_as_ulong(int value) throws InvalidValue
 224   {
 225     if (value < 0 || value >= values.length)
 226       throw new InvalidValue(value + " not in [0.." + values.length);
 227     else
 228       {
 229         current = value;
 230         valueChanged();
 231       }
 232   }
 233
 234   /**
 235    * Wrap the enumeration value into any.
 236    */
 237   public Any to_any()
 238   {
 239     Any a = createAny();
 240     a.insert_long(current);
 241     a.type(official_type);
 242     return a;
 243   }
 244 }