UnionEntry.java revision 672:2bb058ce572e 
1/*
2 * Copyright (c) 1999, 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
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25/*
26 * COMPONENT_NAME: idl.parser
27 *
28 * ORIGINS: 27
29 *
30 * Licensed Materials - Property of IBM
31 * 5639-D57 (C) COPYRIGHT International Business Machines Corp. 1997, 1999
32 * RMI-IIOP v1.0
33 *
34 */
35
36package com.sun.tools.corba.se.idl;
37
38// NOTES:
39
40import java.io.PrintWriter;
41import java.util.Enumeration;
42import java.util.Hashtable;
43import java.util.Vector;
44
45import com.sun.tools.corba.se.idl.constExpr.Expression;
46
47/**
48 * This is the symbol table entry for unions.
49 **/
50public class UnionEntry extends SymtabEntry
51{
52  protected UnionEntry ()
53  {
54    super ();
55  } // ctor
56
57  protected UnionEntry (UnionEntry that)
58  {
59    super (that);
60    if (!name ().equals (""))
61    {
62      module (module () + name ());
63      name ("");
64    }
65    _branches      = (Vector)that._branches.clone ();
66    _defaultBranch = that._defaultBranch;
67    _contained     = that._contained;
68  } // ctor
69
70  protected UnionEntry (SymtabEntry that, IDLID clone)
71  {
72    super (that, clone);
73    if (module ().equals (""))
74      module (name ());
75    else if (!name ().equals (""))
76      module (module () + "/" + name ());
77  } // ctor
78
79  public Object clone ()
80  {
81    return new UnionEntry (this);
82  } // clone
83
84  /** Invoke the union generator.
85      @param symbolTable the symbol table is a hash table whose key is
86       a fully qualified type name and whose value is a SymtabEntry or
87       a subclass of SymtabEntry.
88      @param stream the stream to which the generator should sent its output.
89      @see SymtabEntry */
90  public void generate (Hashtable symbolTable, PrintWriter stream)
91  {
92    unionGen.generate (symbolTable, this, stream);
93  } // generate
94
95  /** Access the union generator.
96      @return an object which implements the UnionGen interface.
97      @see UnionGen */
98  public Generator generator ()
99  {
100    return unionGen;
101  } // generator
102
103  public void addBranch (UnionBranch branch)
104  {
105    _branches.addElement (branch);
106  } // addBranch
107
108  /** This is a vector of UnionBranch's. */
109  public Vector branches ()
110  {
111    return _branches;
112  } // branches
113
114  /** This TypedefEntry describes the type and name for the default branch.
115      Like the entries in the branches vector, only the type and name fields
116      are pertinent. */
117  public void defaultBranch (TypedefEntry branch)
118  {
119    _defaultBranch = branch;
120  } // defaultBranch
121
122  /** This TypedefEntry describes the type and name for the default branch.
123      Like the entries in the branches vector, only the type and name fields
124      are pertinent. */
125  public TypedefEntry defaultBranch ()
126  {
127    return _defaultBranch;
128  } // defaultBranch
129
130  public void addContained (SymtabEntry entry)
131  {
132    _contained.addElement (entry);
133  } // addContained
134
135  /** This is a vector of SymtabEntry's.  It itemizes any types which
136      this union contains.  For example:
137
138      <pre>
139      union A
140      switch (long)
141      {
142        case 0: long x;
143        case 1:
144          Struct B
145          {
146            long a;
147            long b;
148          } y;
149      }
150      </pre>
151      Struct B is contained within union A. */
152  public Vector contained ()
153  {
154    return _contained;
155  } // contained
156
157  boolean has (Expression label)
158  {
159    Enumeration eBranches = _branches.elements ();
160    while (eBranches.hasMoreElements ())
161    {
162      Enumeration eLabels = ((UnionBranch)eBranches.nextElement ()).labels.elements ();
163      while (eLabels.hasMoreElements ())
164      {
165        Expression exp = (Expression)eLabels.nextElement ();
166        if (exp.equals (label) || exp.value ().equals (label.value ()))
167          return true;
168      }
169    }
170    return false;
171  } // has
172
173  boolean has (TypedefEntry typedef)
174  {
175    Enumeration e = _branches.elements ();
176    while (e.hasMoreElements ())
177    {
178      UnionBranch branch = (UnionBranch)e.nextElement ();
179      if (!branch.typedef.equals (typedef) && branch.typedef.name ().equals (typedef.name ()))
180        return true;
181    }
182    return false;
183  } // has
184
185  /** A vector of UnionBranch's. */
186  private Vector       _branches      = new Vector ();
187  private TypedefEntry _defaultBranch = null;
188  private Vector       _contained     = new Vector ();
189
190  static UnionGen unionGen;
191} // class UnionEntry
192