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1 package com.thaiopensource.relaxng.impl;
2
3 import org.relaxng.datatype.Datatype;
4 import org.relaxng.datatype.ValidationContext;
5
6 import java.util.Hashtable  ;
7
8 class ValueDataDerivType extends DataDerivType {
9 private final Datatype dt;
10 private PatternMemo noValue;
11 private Hashtable valueTable;
12
13 ValueDataDerivType(Datatype dt) {
14 this.dt = dt;
15 }
16
17 DataDerivType copy() {
18 return new ValueDataDerivType(dt);
19 }
20
21 PatternMemo dataDeriv(ValidatorPatternBuilder builder, Pattern p, String str, ValidationContext vc) {
22 Object value = dt.createValue(str, vc);
23 if (value == null) {
24 if (noValue == null)
25 noValue = super.dataDeriv(builder, p, str, vc);
26 return noValue;
27 }
28 else {
29 DatatypeValue dtv = new DatatypeValue(value, dt);
30 if (valueTable == null)
31 valueTable = new Hashtable ();
32 PatternMemo tem = (PatternMemo)valueTable.get(dtv);
33 if (tem == null) {
34 tem = super.dataDeriv(builder, p, str, vc);
35 valueTable.put(dtv, tem);
36 }
37 return tem;
38 }
39 }
40
41 DataDerivType combine(DataDerivType ddt) {
42 if (ddt instanceof ValueDataDerivType) {
43 if (((ValueDataDerivType)ddt).dt == this.dt)
44 return this;
45 else
46 return InconsistentDataDerivType.getInstance();
47 }
48 else
49 return ddt.combine(this);
50 }
51
52 Datatype getDatatype() {
53 return dt;
54 }
55 }
56 |
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