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22
23 package org.xquark.xquery.typing;
24
25 import java.util.ArrayList  ;
26 import java.util.Iterator ;
27 import java.util.List ;
28
29 import org.xquark.schema.*;
30 import org.xquark.xquery.parser.QName;
31 import org.xquark.xquery.parser.XQueryException;
32
33 public class OccurrenceVisitor extends DefaultSchemaVisitor {
34 private static final String RCSRevision = "$Revision: 1.4 $";
35 private static final String RCSName = "$Name: $";
36 private static final String STAR = "*";
37
38 private int[] occurs = new int[2];
39 private String namespace = null;
40 private String name = null;
41 private List matches = new ArrayList ();
42 private boolean matchesWildcard = false;
43 private SchemaManager schemamanager = null;
44
45 public void reset(String namespace, String name, SchemaManager schemamanager) {
46 occurs[0] = occurs[1] = 0;
47 matches.clear();
48 matchesWildcard = false;
49 this.namespace = namespace;
50 this.name = name;
51 this.schemamanager = schemamanager;
52 }
53
54 public QType getQType() throws XQueryException {
55 byte occurrence = QType.OCC_0_0;
57 if (occurs[0] == 0) {
58 if (occurs[1] == 0)
59 occurrence = QType.OCC_0_0;
60 else if (occurs[1] == 1)
61 occurrence = QType.OCC_0_1;
62 else
63 occurrence = QType.OCC_0_N;
64 } else if (occurs[0] == 1) {
65 if (occurs[1] == 1)
66 occurrence = QType.OCC_1_1;
67 else
68 occurrence = QType.OCC_1_N;
69 }
70 if (matchesWildcard) {
71 return new QTypeElement(new QName(namespace, null, name, null, null), schemamanager.getType(SchemaConstants.XMLSCHEMA_URI, TypeVisitor.SC_ANYTYPE), occurrence);
72 }
73 if (!matches.isEmpty()) {
74 if (matches.size() == 1) {
75 return getQTypeFromDeclaration((Declaration) matches.get(0), occurrence);
76 } else {
77 ArrayList qtypes = new ArrayList (matches.size());
78 for (int i = 0; i < matches.size(); i++) {
79 qtypes.add(getQTypeFromDeclaration((Declaration) matches.get(i), QType.OCC_1_1));
80 }
81 return new QTypeUnion(qtypes, occurrence);
82 }
83 }
84 return null;
85 }
86
87
94 private void setValues(long min, long max) {
95 if (max > Integer.MAX_VALUE)
96 max = Integer.MAX_VALUE;
97 occurs[0] = (int) min;
98 occurs[1] = (int) max;
99 }
100
101 public void visit(Particle particle) throws SchemaException {
102 ((SchemaVisitable) particle.getTerm()).accept(this);
103 long min = occurs[0] * particle.getMinOccurs();
104 long max = occurs[1] * particle.getMaxOccurs();
105 setValues(min, max);
106 }
107
108 public void visit(ModelGroup group) throws SchemaException {
109 long min = 0;
110 long max = 0;
111 Iterator it = group.iterator();
112 while (it.hasNext()) {
113 occurs[0] = occurs[1] = 0;
114 ((SchemaVisitable) it.next()).accept(this);
115 min += occurs[0];
116 max += occurs[1];
117 }
118 setValues(min, max);
119 }
120
121 public void visit(ChoiceModelGroup group) throws SchemaException {
122 long min = Integer.MAX_VALUE;
123 long max = 0;
124 Iterator it = group.iterator();
125 while (it.hasNext()) {
126 occurs[0] = occurs[1] = 0;
127 ((SchemaVisitable) it.next()).accept(this);
128 if (occurs[0] < min)
129 min = occurs[0];
130 if (occurs[1] > max)
131 max = occurs[1];
132 }
133 setValues(min, max);
134 }
135
136 public void visit(ElementDeclaration decl) throws SchemaException {
137 if (namespace != null && namespace.equals(STAR)) {
138 if (name.equals(STAR)) {
139 matches.add(decl);
140 if (decl.getSubstitutionElementList() != null)
141 matches.addAll(decl.getSubstitutionElementList());
142 } else {
143 if (name.equals(decl.getName())) {
144 matches.add(decl);
145 }
146 List decllist = decl.getSubstitutionElementList();
147 if (decllist != null && !decllist.isEmpty()) {
148 for (int i = 0; i < decllist.size(); i++) {
149 if (name.equals(((Declaration) decllist.get(i)).getName())) {
150 matches.add(decllist.get(i));
151 }
152 }
153 }
154 }
155 } else if (name.equals(STAR)) {
156 if (namespace != null && namespace.equals(decl.getNamespace())) {
157 matches.add(decl);
158 }
159 List decllist = decl.getSubstitutionElementList();
160 if (decllist != null && !decllist.isEmpty()) {
161 for (int i = 0; i < decllist.size(); i++) {
162 if (namespace != null && namespace.equals(((Declaration) decllist.get(i)).getNamespace())) {
163 matches.add(decllist.get(i));
164 }
165 }
166 }
167 }
168 if (decl.hasName(namespace, name) || (decl = decl.getSubstitutionElement(namespace, name)) != null) {
169 occurs[0] = occurs[1] = 1;
170 matches.add(decl);
171 }
172 }
173
174 public void visit(Wildcard wildcard) throws SchemaException {
175 if (wildcard.isAllowed(namespace)) {
176 occurs[0] = occurs[1] = 1;
177 matchesWildcard = true;
178 }
179 }
180
181 private QType getQTypeFromDeclaration(Declaration decl, byte occurrence) throws XQueryException {
183 QName qname = new QName(decl.getNamespace(), null, decl.getName(), null, null);
184 if (decl instanceof AttributeDeclaration) {
185 return new QTypeAttribute(qname, (AttributeDeclaration)decl, (SimpleType) decl.getType());
186 } else if (decl instanceof ElementDeclaration) {
187 return new QTypeElement(qname, decl.getType(), occurrence);
188 }
189 return null;
190 }
191
192 }
193 |
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