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/* HolderLocator.java --

   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.CORBA;

import org.omg.CORBA.AnyHolder;

import org.omg.CORBA.AnySeqHolder;

import org.omg.CORBA.BooleanHolder;

import org.omg.CORBA.BooleanSeqHolder;

import org.omg.CORBA.CharHolder;

import org.omg.CORBA.CharSeqHolder;

import org.omg.CORBA.DoubleHolder;

import org.omg.CORBA.DoubleSeqHolder;

import org.omg.CORBA.FixedHolder;

import org.omg.CORBA.FloatHolder;

import org.omg.CORBA.FloatSeqHolder;

import org.omg.CORBA.IntHolder;

import org.omg.CORBA.LongHolder;

import org.omg.CORBA.LongLongSeqHolder;

import org.omg.CORBA.LongSeqHolder;

import org.omg.CORBA.OctetSeqHolder;

import org.omg.CORBA.PrincipalHolder;

import org.omg.CORBA.ShortHolder;

import org.omg.CORBA.ShortSeqHolder;

import org.omg.CORBA.StringHolder;

import org.omg.CORBA.StringSeqHolder;

import org.omg.CORBA.TCKind;

import org.omg.CORBA.TypeCode;

import org.omg.CORBA.TypeCodeHolder;

import org.omg.CORBA.ULongLongSeqHolder;

import org.omg.CORBA.ULongSeqHolder;

import org.omg.CORBA.UShortSeqHolder;

import org.omg.CORBA.WCharSeqHolder;

import org.omg.CORBA.WStringSeqHolder;

import org.omg.CORBA.portable.Streamable;

import org.omg.CORBA.ObjectHolder;

/**

 * Creates the suitable holder for storing the value of the given final_type.

 *

 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)

 */

public class HolderLocator

{

  /**

   * The array, sufficiently large to use any {@link TCKind}._tk* constant as

   * an index.

   */

  private static final Class[] holders;

  private static final Class[] seqHolders;

  static

    {

      holders = new Class[32];

      holders[TCKind._tk_Principal] = PrincipalHolder.class;

      holders[TCKind._tk_TypeCode] = TypeCodeHolder.class;

      holders[TCKind._tk_any] = AnyHolder.class;

      holders[TCKind._tk_boolean] = BooleanHolder.class;

      holders[TCKind._tk_char] = CharHolder.class;

      holders[TCKind._tk_double] = DoubleHolder.class;

      holders[TCKind._tk_float] = FloatHolder.class;

      holders[TCKind._tk_fixed] = FixedHolder.class;

      holders[TCKind._tk_long] = IntHolder.class;

      holders[TCKind._tk_longdouble] = DoubleHolder.class;

      holders[TCKind._tk_longlong] = LongHolder.class;

      holders[TCKind._tk_octet] = OctetHolder.class;

      holders[TCKind._tk_short] = ShortHolder.class;

      holders[TCKind._tk_string] = StringHolder.class;

      holders[TCKind._tk_ulong] = IntHolder.class;

      holders[TCKind._tk_ulonglong] = LongHolder.class;

      holders[TCKind._tk_ushort] = ShortHolder.class;

      holders[TCKind._tk_wchar] = WCharHolder.class;

      holders[TCKind._tk_wstring] = WStringHolder.class;

      holders[TCKind._tk_objref] = ObjectHolder.class;

      seqHolders = new Class[32];

      seqHolders[TCKind._tk_ulonglong] = ULongLongSeqHolder.class;

      seqHolders[TCKind._tk_short] = ShortSeqHolder.class;

      seqHolders[TCKind._tk_octet] = OctetSeqHolder.class;

      seqHolders[TCKind._tk_any] = AnySeqHolder.class;

      seqHolders[TCKind._tk_long] = LongSeqHolder.class;

      seqHolders[TCKind._tk_longlong] = LongLongSeqHolder.class;

      seqHolders[TCKind._tk_float] = FloatSeqHolder.class;

      seqHolders[TCKind._tk_double] = DoubleSeqHolder.class;

      seqHolders[TCKind._tk_char] = CharSeqHolder.class;

      seqHolders[TCKind._tk_boolean] = BooleanSeqHolder.class;

      seqHolders[TCKind._tk_wchar] = WCharSeqHolder.class;

      seqHolders[TCKind._tk_ushort] = UShortSeqHolder.class;

      seqHolders[TCKind._tk_ulong] = ULongSeqHolder.class;

      seqHolders[TCKind._tk_string] = StringSeqHolder.class;

      seqHolders[TCKind._tk_wstring] = WStringSeqHolder.class;

    }

  /**

   * Create a holder for storing the value of the given built-in final_type. This

   * function returns the defined holders for the built-in primitive types and

   * they sequences.

   *

   * @param t the typecode

   *

   * @return an instance of the corresponding built-in holder of null if no such

   * is defined for this final_type. The holder is created with a parameterless

   * constructor.

   */

  public static Streamable createHolder(TypeCode t)

  {

    try

      {

        int kind = t.kind().value();

        int componentKind;

        Streamable holder = null;

        if (kind < holders.length && holders[kind] != null)

          holder = (Streamable) holders[kind].newInstance();

        if (holder != null)

          return holder;

        switch (kind)

          {

          case TCKind._tk_sequence:

            componentKind = t.content_type().kind().value();

            if (componentKind < seqHolders.length)

              return (Streamable) seqHolders[componentKind].newInstance();

            break;

          default:

            break;

          }

      }

    catch (Exception ex)

      {

        throw new Unexpected(ex);

      }

    try

      {

        Object ox = ObjectCreator.createObject(t.id(), "Holder");

        return (Streamable) ox;

      }

    catch (Exception ex)

      {

        return null;

      }

  }

}