1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * The Apache Software License, Version 1.1
7 *
8 *
9 * Copyright (c) 1999-2002 The Apache Software Foundation. All rights
10 * reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
22 * distribution.
23 *
24 * 3. The end-user documentation included with the redistribution,
25 * if any, must include the following acknowledgment:
26 * "This product includes software developed by the
27 * Apache Software Foundation (http://www.apache.org/)."
28 * Alternately, this acknowledgment may appear in the software itself,
29 * if and wherever such third-party acknowledgments normally appear.
30 *
31 * 4. The names "Xerces" and "Apache Software Foundation" must
32 * not be used to endorse or promote products derived from this
33 * software without prior written permission. For written
34 * permission, please contact apache@apache.org.
35 *
36 * 5. Products derived from this software may not be called "Apache",
37 * nor may "Apache" appear in their name, without prior written
38 * permission of the Apache Software Foundation.
39 *
40 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
41 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
42 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
43 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
46 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
47 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
48 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
49 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
50 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This software consists of voluntary contributions made by many
55 * individuals on behalf of the Apache Software Foundation and was
56 * originally based on software copyright (c) 1999, International
57 * Business Machines, Inc., http://www.apache.org. For more
58 * information on the Apache Software Foundation, please see
59 * <http://www.apache.org/>.
60 */
61
62 package com.sun.org.apache.xerces.internal.impl.dtd.models;
63
64 import com.sun.org.apache.xerces.internal.impl.dtd.XMLContentSpec;
65
66 /**
67 * Content model Uni-Op node.
68 *
69 * @xerces.internal
70 *
71 */
72 public class CMUniOp extends CMNode
73 {
74 // -------------------------------------------------------------------
75 // Constructors
76 // -------------------------------------------------------------------
77 public CMUniOp(int type, CMNode childNode)
78 {
79 super(type);
80
81 // Insure that its one of the types we require
82 if ((type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE)
83 && (type() != XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE)
84 && (type() != XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE))
85 {
86 throw new RuntimeException("ImplementationMessages.VAL_UST");
87 }
88
89 // Store the node and init any data that needs it
90 fChild = childNode;
91 }
92
93
94 // -------------------------------------------------------------------
95 // Package, final methods
96 // -------------------------------------------------------------------
97 final CMNode getChild()
98 {
99 return fChild;
100 }
101
102
103 // -------------------------------------------------------------------
104 // Package, inherited methods
105 // -------------------------------------------------------------------
106 public boolean isNullable()
107 {
108 //
109 // For debugging purposes, make sure we got rid of all non '*'
110 // repetitions. Otherwise, '*' style nodes are always nullable.
111 //
112 if (type() == XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE)
113 return fChild.isNullable();
114 else
115 return true;
116 }
117
118
119 // -------------------------------------------------------------------
120 // Protected, inherited methods
121 // -------------------------------------------------------------------
122 protected void calcFirstPos(CMStateSet toSet)
123 {
124 // Its just based on our child node's first pos
125 toSet.setTo(fChild.firstPos());
126 }
127
128 protected void calcLastPos(CMStateSet toSet)
129 {
130 // Its just based on our child node's last pos
131 toSet.setTo(fChild.lastPos());
132 }
133
134
135 // -------------------------------------------------------------------
136 // Private data members
137 //
138 // fChild
139 // This is the reference to the one child that we have for this
140 // unary operation.
141 // -------------------------------------------------------------------
142 private CMNode fChild;
143 };