gomp-20050608-branch/libjava/classpath/gnu/CORBA/DynAn/gnuDynValue.java

   1 /* gnuDynValue.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.Minor;
  42 import gnu.CORBA.Unexpected;
  43
  44 import org.omg.CORBA.Any;
  45 import org.omg.CORBA.BAD_PARAM;
  46 import org.omg.CORBA.MARSHAL;
  47 import org.omg.CORBA.ORB;
  48 import org.omg.CORBA.TCKind;
  49 import org.omg.CORBA.TypeCode;
  50 import org.omg.CORBA.VM_TRUNCATABLE;
  51 import org.omg.CORBA.portable.OutputStream;
  52 import org.omg.CORBA.portable.ValueFactory;
  53 import org.omg.DynamicAny.DynAny;
  54 import org.omg.DynamicAny.DynAnyPackage.InvalidValue;
  55 import org.omg.DynamicAny.DynAnyPackage.TypeMismatch;
  56 import org.omg.DynamicAny.DynStruct;
  57 import org.omg.DynamicAny.DynValue;
  58 import org.omg.DynamicAny.DynValueCommon;
  59 import org.omg.DynamicAny.DynValueOperations;
  60 import org.omg.DynamicAny.NameDynAnyPair;
  61 import org.omg.DynamicAny.NameValuePair;
  62
  63 import java.io.Serializable;
  64
  65 /**
  66  * Implementation of DynValue.
  67  *
  68  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
  69  */
  70 public class gnuDynValue extends RecordAny implements DynValue,
  71   Serializable
  72 {
  73   /**
  74    * Use serialVersionUID for interoperability.
  75    */
  76   private static final long serialVersionUID = 1;
  77
  78   /**
  79    * If true, the value of this ValueType is set to null.
  80    */
  81   boolean isNull;
  82
  83   /**
  84    * Create an instance.
  85    */
  86   public gnuDynValue(TypeCode oType, TypeCode aType,
  87     gnuDynAnyFactory aFactory, ORB anOrb
  88   )
  89   {
  90     super(oType, aType, aFactory, anOrb);
  91
  92     // Initialise fields. The array of fields also includes all inherited
  93     // fields.
  94     try
  95       {
  96         array = new DynAny[ final_type.member_count() ];
  97         fNames = new String[ array.length ];
  98         for (int i = 0; i < array.length; i++)
  99           {
 100             array [ i ] =
 101               factory.create_dyn_any_from_type_code(final_type.member_type(i));
 102             fNames [ i ] = final_type.member_name(i);
 103           }
 104
 105         // Search of inherited members.
 106         if (final_type.type_modifier() == VM_TRUNCATABLE.value)
 107           {
 108             TypeCode parent = final_type.concrete_base_type();
 109             DynAny ancestor = factory.create_dyn_any_from_type_code(parent);
 110
 111             if (ancestor instanceof DynValue)
 112               {
 113                 // Add members of ancestor in front of the curren members.
 114                 DynValue anc = (DynValue) ancestor;
 115                 anc.set_to_value();
 116
 117                 NameDynAnyPair[] aar = anc.get_members_as_dyn_any();
 118                 inheritFields(aar);
 119               }
 120             else if (ancestor instanceof DynStruct)
 121               {
 122                 // Add members of ancestor in front of the curren members.
 123                 DynStruct anc = (DynStruct) ancestor;
 124                 NameDynAnyPair[] aar = anc.get_members_as_dyn_any();
 125                 inheritFields(aar);
 126               }
 127             else
 128               throw new BAD_PARAM("The parent of " + final_type.id() + ", " +
 129                 parent.id() + ", is not structure nor value."
 130               );
 131           }
 132       }
 133     catch (Exception e)
 134       {
 135         throw new Unexpected(e);
 136       }
 137
 138     set_to_null();
 139   }
 140
 141   /**
 142    * Inherit the provided fields.
 143    */
 144   private void inheritFields(NameDynAnyPair[] aar)
 145   {
 146     DynAny[] nArray = new DynAny[ array.length + aar.length ];
 147     String[] nNames = new String[ array.length + aar.length ];
 148     int p = 0;
 149     for (int i = 0; i < aar.length; i++)
 150       {
 151         nArray [ p ] = aar [ i ].value;
 152         nNames [ p ] = aar [ i ].id;
 153         p++;
 154       }
 155
 156     for (int i = 0; i < array.length; i++)
 157       {
 158         nArray [ p ] = array [ i ];
 159         nNames [ p ] = fNames [ i ];
 160         p++;
 161       }
 162
 163     array = nArray;
 164     fNames = nNames;
 165   }
 166
 167   /** @inheritDoc */
 168   public TCKind current_member_kind() throws TypeMismatch, InvalidValue
 169   {
 170     if (isNull)
 171       throw new TypeMismatch(ISNULL);
 172     else
 173       return super.current_member_kind();
 174   }
 175   ;
 176
 177   /** @inheritDoc */
 178   public String current_member_name() throws TypeMismatch, InvalidValue
 179   {
 180     if (isNull)
 181       throw new TypeMismatch(ISNULL);
 182     else
 183       return super.current_member_name();
 184   }
 185   ;
 186
 187   /** @inheritDoc */
 188   public NameDynAnyPair[] get_members_as_dyn_any() throws InvalidValue
 189   {
 190     if (isNull)
 191       throw new InvalidValue(ISNULL);
 192     return super.gnu_get_members_as_dyn_any();
 193   }
 194   ;
 195
 196   /** @inheritDoc */
 197   public NameValuePair[] get_members() throws InvalidValue
 198   {
 199     if (isNull)
 200       throw new InvalidValue(ISNULL);
 201     else
 202       return super.gnu_get_members();
 203   }
 204   ;
 205
 206   /** @inheritDoc */
 207   public void set_members_as_dyn_any(NameDynAnyPair[] value)
 208     throws TypeMismatch, InvalidValue
 209   {
 210     super.set_members_as_dyn_any(value);
 211     isNull = false;
 212   }
 213   ;
 214
 215   /** @inheritDoc */
 216   public void set_members(NameValuePair[] value)
 217     throws TypeMismatch, InvalidValue
 218   {
 219     super.set_members(value);
 220     isNull = false;
 221   }
 222   ;
 223
 224   /** @inheritDoc */
 225   public boolean is_null()
 226   {
 227     return isNull;
 228   }
 229
 230   /** @inheritDoc */
 231   public void set_to_null()
 232   {
 233     isNull = true;
 234     valueChanged();
 235   }
 236
 237   /** @inheritDoc */
 238   public void set_to_value()
 239   {
 240     isNull = false;
 241     valueChanged();
 242   }
 243
 244   /**
 245    * Create a new instance.
 246    */
 247   protected RecordAny newInstance(TypeCode oType, TypeCode aType,
 248     gnuDynAnyFactory aFactory, ORB anOrb
 249   )
 250   {
 251     gnuDynValue v = new gnuDynValue(oType, aType, aFactory, anOrb);
 252     if (isNull)
 253       v.set_to_null();
 254     else
 255       v.set_to_value();
 256     return v;
 257   }
 258
 259   /**
 260    * Compare for equality, minding null values.
 261    */
 262   public boolean equal(DynAny other)
 263   {
 264     if (other instanceof DynValueOperations)
 265       {
 266         DynValueCommon o = (DynValueCommon) other;
 267         if (isNull)
 268           return o.is_null() && o.type().equal(official_type);
 269         else
 270           return !o.is_null() && super.equal(other);
 271       }
 272     else
 273       return false;
 274   }
 275
 276   /**
 277    * Get the focused component, throwing exception if the current value is null.
 278    */
 279   protected DynAny focused() throws InvalidValue, TypeMismatch
 280   {
 281     if (isNull)
 282       throw new TypeMismatch(ISNULL);
 283     else
 284       return super.focused();
 285   }
 286
 287   /**
 288    * Convert into Any.
 289    */
 290   public Any to_any()
 291   {
 292     if (isNull)
 293       {
 294         Any a0 = createAny();
 295         a0.type(orb.get_primitive_tc(TCKind.tk_null));
 296         return a0;
 297       }
 298     else
 299       {
 300         try
 301           {
 302             ValueFactory factory =
 303               ((org.omg.CORBA_2_3.ORB) orb).lookup_value_factory(official_type.id());
 304             if (factory == null)
 305               {
 306                 MARSHAL m = new MARSHAL("Factory for " + official_type.id() +
 307                 " not registered.");
 308                 m.minor = Minor.Factory;
 309                 throw m;
 310               }
 311
 312             OutputStream out = orb.create_output_stream();
 313
 314             for (int i = 0; i < array.length; i++)
 315               array [ i ].to_any().write_value(out);
 316
 317             org.omg.CORBA_2_3.portable.InputStream in =
 318               (org.omg.CORBA_2_3.portable.InputStream) out.create_input_stream();
 319             Serializable v = factory.read_value(in);
 320
 321             Any g = createAny();
 322             g.type(official_type);
 323             g.insert_Value(v, official_type);
 324
 325             return g;
 326           }
 327         catch (Exception e)
 328           {
 329             throw new Unexpected(e);
 330           }
 331       }
 332   }
 333
 334   /** @inheritDoc */
 335   public void assign(DynAny from) throws TypeMismatch
 336   {
 337     checkType(official_type, from.type());
 338
 339     if (from instanceof DynValue)
 340       {
 341         DynValue other = (DynValue) from;
 342         if (other.is_null())
 343           set_to_null();
 344         else
 345           {
 346             set_to_value();
 347             try
 348               {
 349                 DynValueOperations src = (DynValueOperations) from;
 350                 set_members_as_dyn_any(src.get_members_as_dyn_any());
 351               }
 352             catch (InvalidValue e)
 353               {
 354                 TypeMismatch t = new TypeMismatch("Invalid value");
 355                 t.initCause(e);
 356                 throw t;
 357               }
 358           }
 359       }
 360     else
 361       throw new TypeMismatch("Not a DynValue");
 362   }
 363
 364   /**
 365    * Get the number of components.
 366    */
 367   public int component_count()
 368   {
 369     return isNull ? 0 : super.component_count();
 370   }
 371
 372   /** {@inheritDoc} */
 373   public Serializable get_val() throws TypeMismatch, InvalidValue
 374   {
 375     return to_any().extract_Value();
 376   }
 377
 378   /** {@inheritDoc} */
 379   public void insert_val(Serializable a_x) throws InvalidValue, TypeMismatch
 380   {
 381     Any a = to_any();
 382     a.insert_Value(a_x);
 383     from_any(a);
 384     valueChanged();
 385   }
 386 }