1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 1999-2002,2004 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package com.sun.org.apache.xerces.internal.impl.xs.models;
22
23 import com.sun.org.apache.xerces.internal.impl.dtd.models.CMNode;
24 import com.sun.org.apache.xerces.internal.impl.dtd.models.CMStateSet;
25 import com.sun.org.apache.xerces.internal.impl.xs.XSParticleDecl;
26
27 /**
28 *
29 * Content model Uni-Op node.
30 *
31 * @xerces.internal
32 *
33 * @author Neil Graham, IBM
34 * @version $$
35 */
36 public class XSCMUniOp extends CMNode {
37 // -------------------------------------------------------------------
38 // Constructors
39 // -------------------------------------------------------------------
40 public XSCMUniOp(int type, CMNode childNode) {
41 super(type);
42
43 // Insure that its one of the types we require
44 if ((type() != XSParticleDecl.PARTICLE_ZERO_OR_ONE)
45 && (type() != XSParticleDecl.PARTICLE_ZERO_OR_MORE)
46 && (type() != XSParticleDecl.PARTICLE_ONE_OR_MORE)) {
47 throw new RuntimeException("ImplementationMessages.VAL_UST");
48 }
49
50 // Store the node and init any data that needs it
51 fChild = childNode;
52 }
53
54
55 // -------------------------------------------------------------------
56 // Package, final methods
57 // -------------------------------------------------------------------
58 final CMNode getChild() {
59 return fChild;
60 }
61
62
63 // -------------------------------------------------------------------
64 // Package, inherited methods
65 // -------------------------------------------------------------------
66 public boolean isNullable() {
67 //
68 // For debugging purposes, make sure we got rid of all non '*'
69 // repetitions. Otherwise, '*' style nodes are always nullable.
70 //
71 if (type() == XSParticleDecl.PARTICLE_ONE_OR_MORE)
72 return fChild.isNullable();
73 else
74 return true;
75 }
76
77
78 // -------------------------------------------------------------------
79 // Protected, inherited methods
80 // -------------------------------------------------------------------
81 protected void calcFirstPos(CMStateSet toSet) {
82 // Its just based on our child node's first pos
83 toSet.setTo(fChild.firstPos());
84 }
85
86 protected void calcLastPos(CMStateSet toSet) {
87 // Its just based on our child node's last pos
88 toSet.setTo(fChild.lastPos());
89 }
90
91 /**
92 * Allows the user to set arbitrary data on this content model
93 * node. This is used by the a{n,m} optimization that runs
94 * in constant space. For convenience, set user data in
95 * children node too.
96 */
97 @Override
98 public void setUserData(Object userData) {
99 super.setUserData(userData);
100 fChild.setUserData(userData);
101 }
102
103
104 // -------------------------------------------------------------------
105 // Private data members
106 //
107 // fChild
108 // This is the reference to the one child that we have for this
109 // unary operation.
110 // -------------------------------------------------------------------
111 private CMNode fChild;
112 } // XSCMUniOp