Line data    Source code

       1             : // Copyright (C) 2010 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.query.change;
      16             : 
      17             : import static com.google.gerrit.server.index.change.ChangeField.EXACT_TOPIC;
      18             : 
      19             : import com.google.gerrit.entities.Change;
      20             : import dk.brics.automaton.RegExp;
      21             : import dk.brics.automaton.RunAutomaton;
      22             : 
      23             : public class RegexTopicPredicate extends ChangeRegexPredicate {
      24             :   protected final RunAutomaton pattern;
      25             : 
      26             :   public RegexTopicPredicate(String re) {
      27           4 :     super(EXACT_TOPIC, re);
      28             : 
      29           4 :     if (re.startsWith("^")) {
      30           4 :       re = re.substring(1);
      31             :     }
      32             : 
      33           4 :     if (re.endsWith("$") && !re.endsWith("\\$")) {
      34           4 :       re = re.substring(0, re.length() - 1);
      35             :     }
      36             : 
      37           4 :     this.pattern = new RunAutomaton(new RegExp(re).toAutomaton());
      38           4 :   }
      39             : 
      40             :   @Override
      41             :   public boolean match(ChangeData object) {
      42           2 :     Change change = object.change();
      43           2 :     if (change == null || change.getTopic() == null) {
      44           0 :       return false;
      45             :     }
      46           2 :     return pattern.run(change.getTopic());
      47             :   }
      48             : 
      49             :   @Override
      50             :   public int getCost() {
      51           0 :     return 1;
      52             :   }
      53             : }