example-changeHasOperator/src/main/java/com/googlesource/gerrit/plugins/examples/changehasoperator/SampleHasOperand.java

// Copyright (C) 2015 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.googlesource.gerrit.plugins.examples.changehasoperator;

import com.google.gerrit.server.query.Predicate;
import com.google.gerrit.server.query.QueryParseException;
import com.google.gerrit.server.query.change.ChangeData;
import com.google.gerrit.server.query.change.ChangeOperatorPredicate;
import com.google.gerrit.server.query.change.ChangeQueryBuilder;
import com.google.inject.Singleton;

@Singleton
public class SampleHasOperand implements ChangeQueryBuilder.ChangeHasOperandFactory {
  public static class MyOddPredicate extends ChangeOperatorPredicate {

    MyOddPredicate() {
      super("has", "odd");
    }

    @Override
    public boolean match(ChangeData object) {
      return (object.getId().get() % 2) == 1;
    }

    @Override
    public int getCost() {
      return 1;
    }
  }

  @Override
  public Predicate<ChangeData> create(ChangeQueryBuilder builder) throws QueryParseException {
    return new MyOddPredicate();
  }
}