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// Copyright (C) 2010 The Android Open Source Project
//
// Licensed 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 com.google.gerrit.server.query.change;
import static com.google.gerrit.server.index.change.ChangeField.EXACT_TOPIC;
import com.google.gerrit.entities.Change;
import dk.brics.automaton.RegExp;
import dk.brics.automaton.RunAutomaton;
public class RegexTopicPredicate extends ChangeRegexPredicate {
protected final RunAutomaton pattern;
public RegexTopicPredicate(String re) {
super(EXACT_TOPIC, re);
if (re.startsWith("^")) {
re = re.substring(1);
}
if (re.endsWith("$") && !re.endsWith("\\$")) {
re = re.substring(0, re.length() - 1);
}
this.pattern = new RunAutomaton(new RegExp(re).toAutomaton());
}
@Override
public boolean match(ChangeData object) {
Change change = object.change();
if (change == null || change.getTopic() == null) {
return false;
}
return pattern.run(change.getTopic());
}
@Override
public int getCost() {
return 1;
}
}