// Copyright (C) 2014 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;
import com.google.auto.value.AutoValue;
import com.google.gerrit.common.Nullable;
import java.util.List;
/** Results of a query over entities. */
@AutoValue
public abstract class QueryResult<T> {
static <T> QueryResult<T> create(
@Nullable String query, Predicate<T> predicate, int limit, List<T> entites) {
boolean more;
if (entites.size() > limit) {
more = true;
entites = entites.subList(0, limit);
} else {
more = false;
}
return new AutoValue_QueryResult<>(query, predicate, entites, more);
}
/** @return the original query string, or null if the query was created programmatically. */
@Nullable
public abstract String query();
/** @return the predicate after all rewriting and other modification by the query subsystem. */
public abstract Predicate<T> predicate();
/** @return the query results. */
public abstract List<T> entities();
/**
* @return whether the query could be retried with {@link QueryProcessor#setStart(int)} to produce
* more results. Never true if {@link #entities()} is empty.
*/
public abstract boolean more();
}