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Java > Open Source Codes > com > sun > org > apache > xerces > internal > impl > dtd > models > CMAny


1 /*
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52  * originally based on software copyright (c) 1999, International
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57
58 package com.sun.org.apache.xerces.internal.impl.dtd.models;
59
60
61 /**
62  * Content model any node.
63  *
64  * @version $Id: CMAny.java,v 1.3 2003/05/08 20:11:55 elena Exp $
65  */
66 public class CMAny
67     extends CMNode {
68
69     //
70 // Data
71 //
72
73     /**
74      * The any content model type. This value is one of the following:
75      * XMLContentSpec.CONTENTSPECNODE_ANY,
76      * XMLContentSpec.CONTENTSPECNODE_ANY_OTHER,
77      * XMLContentSpec.CONTENTSPECNODE_ANY_LOCAL.
78      */
79     private int fType;
80
81     /**
82      * URI of the any content model. This value is set if the type is
83      * of the following:
84      * XMLContentSpec.CONTENTSPECNODE_ANY,
85      * XMLContentSpec.CONTENTSPECNODE_ANY_OTHER.
86      */
87     private String JavaDoc fURI;
88
89     /**
90      * Part of the algorithm to convert a regex directly to a DFA
91      * numbers each leaf sequentially. If its -1, that means its an
92      * epsilon node. Zero and greater are non-epsilon positions.
93      */
94     private int fPosition = -1;
95
96     //
97 // Constructors
98 //
99
100     /** Constructs a content model any. */
101     public CMAny(int type, String JavaDoc uri, int position) {
102         super(type);
103
104         // Store the information
105 fType = type;
106         fURI = uri;
107         fPosition = position;
108     }
109
110     //
111 // Package methods
112 //
113
114     final int getType() {
115         return fType;
116     }
117
118     final String JavaDoc getURI() {
119         return fURI;
120     }
121
122     final int getPosition()
123     {
124         return fPosition;
125     }
126
127     final void setPosition(int newPosition)
128     {
129         fPosition = newPosition;
130     }
131
132     //
133 // CMNode methods
134 //
135
136     // package
137
138     public boolean isNullable()
139     {
140         // Leaf nodes are never nullable unless its an epsilon node
141 return (fPosition == -1);
142     }
143
144     public String JavaDoc toString()
145     {
146         StringBuffer JavaDoc strRet = new StringBuffer JavaDoc();
147         strRet.append("(");
148         strRet.append("##any:uri=");
149         strRet.append(fURI);
150         strRet.append(')');
151         if (fPosition >= 0)
152         {
153             strRet.append
154             (
155                 " (Pos:"
156                 + new Integer JavaDoc(fPosition).toString()
157                 + ")"
158             );
159         }
160         return strRet.toString();
161     }
162
163     // protected
164
165     protected void calcFirstPos(CMStateSet toSet)
166     {
167         // If we are an epsilon node, then the first pos is an empty set
168 if (fPosition == -1)
169             toSet.zeroBits();
170
171         // Otherwise, its just the one bit of our position
172 else
173             toSet.setBit(fPosition);
174     }
175
176     protected void calcLastPos(CMStateSet toSet)
177     {
178         // If we are an epsilon node, then the last pos is an empty set
179 if (fPosition == -1)
180             toSet.zeroBits();
181
182         // Otherwise, its just the one bit of our position
183 else
184             toSet.setBit(fPosition);
185     }
186
187 } // class CMAny
188
189
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