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 com.google.gerrit.entities.Change;
      18             : import com.google.gerrit.index.query.QueryParseException;
      19             : import com.google.gerrit.server.index.change.ChangeField;
      20             : import dk.brics.automaton.RegExp;
      21             : import dk.brics.automaton.RunAutomaton;
      22             : 
      23             : public class RegexRefPredicate extends ChangeRegexPredicate {
      24             :   protected final RunAutomaton pattern;
      25             : 
      26             :   public RegexRefPredicate(String re) throws QueryParseException {
      27           0 :     super(ChangeField.REF_SPEC, re);
      28             : 
      29           0 :     if (re.startsWith("^")) {
      30           0 :       re = re.substring(1);
      31             :     }
      32             : 
      33           0 :     if (re.endsWith("$") && !re.endsWith("\\$")) {
      34           0 :       re = re.substring(0, re.length() - 1);
      35             :     }
      36             : 
      37             :     try {
      38           0 :       this.pattern = new RunAutomaton(new RegExp(re).toAutomaton());
      39           0 :     } catch (IllegalArgumentException e) {
      40           0 :       throw new QueryParseException(String.format("invalid regular expression: %s", re), e);
      41           0 :     }
      42           0 :   }
      43             : 
      44             :   @Override
      45             :   public boolean match(ChangeData object) {
      46           0 :     Change change = object.change();
      47           0 :     if (change == null) {
      48           0 :       return false;
      49             :     }
      50           0 :     return pattern.run(change.getDest().branch());
      51             :   }
      52             : 
      53             :   @Override
      54             :   public int getCost() {
      55           0 :     return 1;
      56             :   }
      57             : }