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1 package com.thaiopensource.relaxng.impl;
2
3 class GroupPattern extends BinaryPattern {
4 GroupPattern(Pattern p1, Pattern p2) {
5 super(p1.isNullable() && p2.isNullable(),
6 combineHashCode(GROUP_HASH_CODE, p1.hashCode(), p2.hashCode()),
7 p1,
8 p2);
9 }
10
11 Pattern expand(SchemaPatternBuilder b) {
12 Pattern ep1 = p1.expand(b);
13 Pattern ep2 = p2.expand(b);
14 if (ep1 != p1 || ep2 != p2)
15 return b.makeGroup(ep1, ep2);
16 else
17 return this;
18 }
19
20 void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha) throws RestrictionViolationException {
21 switch (context) {
22 case START_CONTEXT:
23 throw new RestrictionViolationException("start_contains_group");
24 case DATA_EXCEPT_CONTEXT:
25 throw new RestrictionViolationException("data_except_contains_group");
26 }
27 super.checkRestrictions(context == ELEMENT_REPEAT_CONTEXT
28 ? ELEMENT_REPEAT_GROUP_CONTEXT
29 : context,
30 dad,
31 alpha);
32 if (context != LIST_CONTEXT
33 && !contentTypeGroupable(p1.getContentType(), p2.getContentType()))
34 throw new RestrictionViolationException("group_string");
35 }
36
37 void accept(PatternVisitor visitor) {
38 visitor.visitGroup(p1, p2);
39 }
40 Object  apply(PatternFunction f) {
41 return f.caseGroup(this);
42 }
43 }
44 |
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