/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tika.sax.xpath;
/**
* Composite XPath evaluation state. Used when XPath evaluation results
* in two or more branches of independent evaluation states.
*/
public class CompositeMatcher extends Matcher {
private final Matcher a;
private final Matcher b;
public CompositeMatcher(Matcher a, Matcher b) {
this.a = a;
this.b = b;
}
public Matcher descend(String namespace, String name) {
Matcher a = this.a.descend(namespace, name);
Matcher b = this.b.descend(namespace, name);
if (a == FAIL) {
return b;
} else if (b == FAIL) {
return a;
} else if (this.a == a && this.b == b) {
return this;
} else {
return new CompositeMatcher(a, b);
}
}
public boolean matchesElement() {
return a.matchesElement() || b.matchesElement();
}
public boolean matchesAttribute(String namespace, String name) {
return a.matchesAttribute(namespace, name)
|| b.matchesAttribute(namespace, name);
}
public boolean matchesText() {
return a.matchesText() || b.matchesText();
}
}