com.google.gerrit.server.query.change.ChangeIndexPredicate Maven / Gradle / Ivy
// Copyright (C) 2016 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 com.google.gerrit.index.FieldDef;
import com.google.gerrit.index.query.IndexPredicate;
import com.google.gerrit.index.query.Matchable;
import com.google.gerrit.index.query.Predicate;
/** Predicate that is mapped to a field in the change index. */
public abstract class ChangeIndexPredicate extends IndexPredicate
implements Matchable {
/**
* Returns an index predicate that matches no changes in the index.
*
* This predicate should be used in preference to a non-index predicate (such as {@code
* Predicate.not(Predicate.any())}), since it can be matched efficiently against the index.
*
* @return an index predicate matching no changes.
*/
public static Predicate none() {
return ChangeStatusPredicate.NONE;
}
protected ChangeIndexPredicate(FieldDef def, String value) {
super(def, value);
}
protected ChangeIndexPredicate(FieldDef def, String name, String value) {
super(def, name, value);
}
}