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/*
* Copyright (C) 2004-2011
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.sun.tools.rngom.binary;
import com.sun.tools.rngom.binary.visitor.PatternFunction;
import com.sun.tools.rngom.binary.visitor.PatternVisitor;
public class ChoicePattern extends BinaryPattern {
ChoicePattern(Pattern p1, Pattern p2) {
super(p1.isNullable() || p2.isNullable(),
combineHashCode(CHOICE_HASH_CODE, p1.hashCode(), p2.hashCode()),
p1,
p2);
}
Pattern expand(SchemaPatternBuilder b) {
Pattern ep1 = p1.expand(b);
Pattern ep2 = p2.expand(b);
if (ep1 != p1 || ep2 != p2)
return b.makeChoice(ep1, ep2);
else
return this;
}
boolean containsChoice(Pattern p) {
return p1.containsChoice(p) || p2.containsChoice(p);
}
public void accept(PatternVisitor visitor) {
visitor.visitChoice(p1, p2);
}
public Object apply(PatternFunction f) {
return f.caseChoice(this);
}
void checkRestrictions(int context, DuplicateAttributeDetector dad, Alphabet alpha)
throws RestrictionViolationException {
if (dad != null)
dad.startChoice();
p1.checkRestrictions(context, dad, alpha);
if (dad != null)
dad.alternative();
p2.checkRestrictions(context, dad, alpha);
if (dad != null)
dad.endChoice();
}
}
