Line data    Source code

       1             : // Copyright (C) 2022 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 com.google.gerrit.index.query.QueryParseException;
      18             : import com.google.gerrit.server.index.change.ChangeField;
      19             : import dk.brics.automaton.RegExp;
      20             : import dk.brics.automaton.RunAutomaton;
      21             : 
      22             : public class RegexMessagePredicate extends ChangeRegexPredicate {
      23             :   protected final RunAutomaton pattern;
      24             : 
      25             :   public RegexMessagePredicate(String re) throws QueryParseException {
      26           5 :     super(ChangeField.COMMIT_MESSAGE_EXACT, re);
      27             : 
      28           5 :     if (re.startsWith("^")) {
      29           5 :       re = re.substring(1);
      30             :     }
      31             : 
      32           5 :     if (re.endsWith("$") && !re.endsWith("\\$")) {
      33           0 :       re = re.substring(0, re.length() - 1);
      34             :     }
      35             : 
      36             :     try {
      37           4 :       this.pattern = new RunAutomaton(new RegExp(re).toAutomaton());
      38           1 :     } catch (IllegalArgumentException e) {
      39           1 :       throw new QueryParseException(String.format("invalid regular expression: %s", re), e);
      40           4 :     }
      41           4 :   }
      42             : 
      43             :   @Override
      44             :   public boolean match(ChangeData cd) {
      45           2 :     return pattern.run(cd.commitMessage());
      46             :   }
      47             : 
      48             :   @Override
      49             :   public int getCost() {
      50           0 :     return 1;
      51             :   }
      52             : }