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1 package com.thaiopensource.relaxng.impl;
2
3 import java.util.Hashtable  ;
4
5 public class FeasibleTransform {
6 private static class FeasiblePatternFunction extends AbstractPatternFunction {
7 private final SchemaPatternBuilder spb;
8 private final Hashtable elementTable = new Hashtable ();
9
10 FeasiblePatternFunction(SchemaPatternBuilder spb) {
11 this.spb = spb;
12 }
13
14 public Object caseChoice(ChoicePattern p) {
15 return spb.makeChoice(p.getOperand1().applyForPattern(this), p.getOperand2().applyForPattern(this));
16 }
17
18 public Object caseGroup(GroupPattern p) {
19 return spb.makeGroup(p.getOperand1().applyForPattern(this), p.getOperand2().applyForPattern(this));
20 }
21
22 public Object caseInterleave(InterleavePattern p) {
23 return spb.makeInterleave(p.getOperand1().applyForPattern(this), p.getOperand2().applyForPattern(this));
24 }
25
26 public Object caseOneOrMore(OneOrMorePattern p) {
27 return spb.makeOneOrMore(p.getOperand().applyForPattern(this));
28 }
29
30 public Object caseElement(ElementPattern p) {
31 if (elementTable.get(p) == null) {
32 elementTable.put(p, p);
33 p.setContent(p.getContent().applyForPattern(this));
34 }
35 return spb.makeOptional(p);
36 }
37
38 public Object caseOther(Pattern p) {
39 return spb.makeOptional(p);
40 }
41 }
42
43 public static Pattern transform(SchemaPatternBuilder spb, Pattern p) {
44 return p.applyForPattern(new FeasiblePatternFunction(spb));
45 }
46 }
47 |
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