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1 package com.thaiopensource.relaxng.impl;
2
3 class InterleavePattern extends BinaryPattern {
4 InterleavePattern(Pattern p1, Pattern p2) {
5 super(p1.isNullable() && p2.isNullable(),
6 combineHashCode(INTERLEAVE_HASH_CODE, p1.hashCode(), p2.hashCode()),
7 p1,
8 p2);
9 }
10 Pattern expand(SchemaPatternBuilder b) {
11 Pattern ep1 = p1.expand(b);
12 Pattern ep2 = p2.expand(b);
13 if (ep1 != p1 || ep2 != p2)
14 return b.makeInterleave(ep1, ep2);
15 else
16 return this;
17 }
18 void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha)
19 throws RestrictionViolationException {
20 switch (context) {
21 case START_CONTEXT:
22 throw new RestrictionViolationException("start_contains_interleave");
23 case DATA_EXCEPT_CONTEXT:
24 throw new RestrictionViolationException("data_except_contains_interleave");
25 case LIST_CONTEXT:
26 throw new RestrictionViolationException("list_contains_interleave");
27 }
28 if (context == ELEMENT_REPEAT_CONTEXT)
29 context = ELEMENT_REPEAT_INTERLEAVE_CONTEXT;
30 Alphabet a1;
31 if (alpha != null && alpha.isEmpty())
32 a1 = alpha;
33 else
34 a1 = new Alphabet();
35 p1.checkRestrictions(context, dad, a1);
36 if (a1.isEmpty())
37 p2.checkRestrictions(context, dad, a1);
38 else {
39 Alphabet a2 = new Alphabet();
40 p2.checkRestrictions(context, dad, a2);
41 a1.checkOverlap(a2);
42 if (alpha != null) {
43 if (alpha != a1)
44 alpha.addAlphabet(a1);
45 alpha.addAlphabet(a2);
46 }
47 }
48 if (!contentTypeGroupable(p1.getContentType(), p2.getContentType()))
49 throw new RestrictionViolationException("interleave_string");
50 if (p1.getContentType() == MIXED_CONTENT_TYPE
51 && p2.getContentType() == MIXED_CONTENT_TYPE)
52 throw new RestrictionViolationException("interleave_text_overlap");
53 }
54
55 void accept(PatternVisitor visitor) {
56 visitor.visitInterleave(p1, p2);
57 }
58 Object  apply(PatternFunction f) {
59 return f.caseInterleave(this);
60 }
61 }
62 |
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