Source for org.omg.CORBA.StringSeqHelper

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