001 /* AnySeqHelper.java --
002 Copyright (C) 2005, 2006 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package org.omg.CORBA;
040
041 import gnu.CORBA.typecodes.ArrayTypeCode;
042
043 import org.omg.CORBA.TypeCodePackage.BadKind;
044 import org.omg.CORBA.portable.InputStream;
045 import org.omg.CORBA.portable.OutputStream;
046 import org.omg.CORBA.portable.Streamable;
047
048 /**
049 * Provides static helper methods for working with
050 * the array of the type {@link Any} (not with the "any array").
051 *
052 * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
053 */
054 public abstract class AnySeqHelper
055 {
056 /**
057 * Extract the array of {@link Any}'s from the
058 * given {@link Any}. This implementation expects the
059 * {@link Any} to hold the instance of {@link AnySeqHolder}
060 * that is returned by {@link Any#extract_Streamable() }.
061 *
062 * @param a an Any to extract the array from.
063 *
064 * @return the extracted array.
065 *
066 * @throws ClassCastException if the Any contains something other than the
067 * the {@link AnySeqHolder}.
068 */
069 public static Any[] extract(Any a)
070 {
071 AnySeqHolder h = (AnySeqHolder) a.extract_Streamable();
072 return h.value;
073 }
074
075 /**
076 * Returns the agreed Id, delegating functionality to
077 * the {@link #type()}.id().
078 */
079 public static String id()
080 {
081 try
082 {
083 return type().id();
084 }
085 catch (BadKind ex)
086 {
087 // Should never happen under correct work.
088 throw new Error("Please report this bug.", ex);
089 }
090 }
091
092 /**
093 * Insert into the given {@link Any}[] into the
094 * given {@link Any}. This implementation first creates
095 * a {@link AnySeqHolder} and then calls
096 * {@link Any#insert_Streamable(Streamable)}.
097 *
098 * @param into the target Any.
099 * @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 }