Source for org.omg.CORBA.AnySeqHelper

   1: /* AnySeqHelper.java --
   2:    Copyright (C) 2005, 2006 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 org.omg.CORBA;
  40: 
  41: import gnu.CORBA.typecodes.ArrayTypeCode;
  42: 
  43: import org.omg.CORBA.TypeCodePackage.BadKind;
  44: import org.omg.CORBA.portable.InputStream;
  45: import org.omg.CORBA.portable.OutputStream;
  46: import org.omg.CORBA.portable.Streamable;
  47: 
  48: /**
  49:  * Provides static helper methods for working with
  50:  * the array of the type {@link Any} (not with the "any array").
  51:  *
  52:  * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
  53:  */
  54: public abstract class AnySeqHelper
  55: {
  56:   /**
  57:    * Extract the array of {@link Any}'s from the
  58:    * given {@link Any}. This implementation expects the
  59:    * {@link Any} to hold the instance of {@link AnySeqHolder}
  60:    * that is returned by {@link Any#extract_Streamable() }.
  61:    *
  62:    * @param a an Any to extract the array from.
  63:    *
  64:    * @return the extracted array.
  65:    *
  66:    * @throws ClassCastException if the Any contains something other than the
  67:    * the {@link AnySeqHolder}.
  68:    */
  69:   public static Any[] extract(Any a)
  70:   {
  71:     AnySeqHolder h = (AnySeqHolder) a.extract_Streamable();
  72:     return h.value;
  73:   }
  74: 
  75:   /**
  76:    * Returns the agreed Id, delegating functionality to
  77:    * the {@link #type()}.id().
  78:    */
  79:   public static String id()
  80:   {
  81:     try
  82:       {
  83:         return type().id();
  84:       }
  85:     catch (BadKind ex)
  86:       {
  87:         // Should never happen under correct work.
  88:         throw new Error("Please report this bug.", ex);
  89:       }
  90:   }
  91: 
  92:   /**
  93:   * Insert into the given {@link Any}[] into the
  94:   * given {@link Any}. This implementation first creates
  95:   * a {@link AnySeqHolder} and then calls
  96:   * {@link Any#insert_Streamable(Streamable)}.
  97:   *
  98:   * @param into the target Any.
  99:   * @param that the array to insert.
 100:   */
 101:   public static void insert(Any into, Any[] that)
 102:   {
 103:     AnySeqHolder holder = new AnySeqHolder(that);
 104:     into.insert_Streamable(holder);
 105:   }
 106: 
 107:   /**
 108:    * Reads the {@link Any}[] from the CORBA input stream.
 109:    * This implementation first creates an instance of
 110:    * {@link AnySeqHolder} and then delegates functionality
 111:    * to its <code>_read()</code> method.
 112:    *
 113:    * @param input the CORBA (not java.io) stream to read from.
 114:    * @return the value from the stream.
 115:    */
 116:   public static Any[] read(InputStream input)
 117:   {
 118:     Any[] value = new Any[ input.read_long() ];
 119:     for (int i = 0; i < value.length; i++)
 120:       {
 121:         value [ i ] = input.read_any();
 122:       }
 123:     return value;
 124:   }
 125: 
 126:   /**
 127:    * Creates and returns a new instance of the TypeCode,
 128:    * corresponding the array of {@link Any}'s.
 129:    * The length of the sequence is left with the initial
 130:    * value 0.
 131:    */
 132:   public static TypeCode type()
 133:   {
 134:     return new ArrayTypeCode(TCKind.tk_any);
 135:   }
 136: 
 137:   /**
 138:    * Writes the array of {@link Any}'s into the given stream.
 139:    *
 140:    * @param output the CORBA (not java.io) output stream to write.
 141:    * @param value the value that must be written.
 142:    */
 143:   public static void write(OutputStream output, Any[] value)
 144:   {
 145:     output.write_long(value.length);
 146: 
 147:     for (int i = 0; i < value.length; i++)
 148:       {
 149:         output.write_any(value [ i ]);
 150:       }
 151:   }
 152: }