TypeCodeHolder.java revision 608:7e06bf1dcb09 
1/*
2 * Copyright (c) 1996, 2001, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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24 */
25
26package org.omg.CORBA;
27
28import org.omg.CORBA.portable.Streamable;
29import org.omg.CORBA.portable.InputStream;
30import org.omg.CORBA.portable.OutputStream;
31
32/**
33 * The Holder for <tt>TypeCode</tt>.  For more information on
34 * Holder files, see <a href="doc-files/generatedfiles.html#holder">
35 * "Generated Files: Holder Files"</a>.<P>
36 * A Holder class for a <code>TypeCode</code> object
37 * that is used to store "out" and "inout" parameters in IDL operations.
38 * If an IDL operation signature has an IDL <code>TypeCode</code> as an "out"
39 * or "inout" parameter, the programmer must pass an instance of
40 * <code>TypeCodeHolder</code> as the corresponding
41 * parameter in the method invocation; for "inout" parameters, the programmer
42 * must also fill the "in" value to be sent to the server.
43 * Before the method invocation returns, the ORB will fill in the
44 * value corresponding to the "out" value returned from the server.
45 * <P>
46 * If <code>myTypeCodeHolder</code> is an instance of <code>TypeCodeHolder</code>,
47 * the value stored in its <code>value</code> field can be accessed with
48 * <code>myTypeCodeHolder.value</code>.
49 *
50 * @since       JDK1.2
51 */
52public final class TypeCodeHolder implements Streamable {
53
54    /**
55     * The <code>TypeCode</code> value held by
56     * this <code>TypeCodeHolder</code> object.
57     */
58    public TypeCode value;
59
60    /**
61     * Constructs a new <code>TypeCodeHolder</code> object with its
62     * <code>value</code> field initialized to <code>null</code>.
63     */
64    public TypeCodeHolder() {
65    }
66
67    /**
68     * Constructs a new <code>TypeCodeHolder</code> object with its
69     * <code>value</code> field initialized to the given
70     * <code>TypeCode</code> object.
71     * @param initial the <code>TypeCode</code> object with which to initialize
72     *                the <code>value</code> field of the newly-created
73     *                <code>TypeCodeHolder</code> object
74     */
75    public TypeCodeHolder(TypeCode initial) {
76        value = initial;
77    }
78
79    /**
80     * Reads from <code>input</code> and initalizes the value in
81     * this <code>TypeCodeHolder</code> object
82     * with the unmarshalled data.
83     *
84     * @param input the InputStream containing CDR formatted data from the wire
85     */
86    public void _read(InputStream input) {
87        value = input.read_TypeCode();
88    }
89
90    /**
91     * Marshals to <code>output</code> the value in
92     * this <code>TypeCodeHolder</code> object.
93     *
94     * @param output the OutputStream which will contain the CDR formatted data
95     */
96    public void _write(OutputStream output) {
97        output.write_TypeCode(value);
98    }
99
100    /**
101     * Returns the TypeCode corresponding to the value held in
102     * this <code>TypeCodeHolder</code> object.
103     *
104     * @return    the TypeCode of the value held in
105     *             this <code>TypeCodeHolder</code> object
106     */
107    public org.omg.CORBA.TypeCode _type() {
108        return ORB.init().get_primitive_tc(TCKind.tk_TypeCode);
109    }
110}
111