gerrit-server/src/main/java/com/google/gerrit/server/query/change/QueryOptions.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.google.gerrit.server.query.change;

import static com.google.common.base.Preconditions.checkArgument;

import com.google.auto.value.AutoValue;
import com.google.gerrit.server.index.IndexConfig;

@AutoValue
public abstract class QueryOptions {
  public static QueryOptions create(IndexConfig config, int start, int limit) {
    checkArgument(start >= 0, "start must be nonnegative: %s", start);
    checkArgument(limit > 0, "limit must be positive: %s", limit);
    return new AutoValue_QueryOptions(config, start, limit);
  }

  public static QueryOptions oneResult() {
    return create(IndexConfig.createDefault(), 0, 1);
  }

  public abstract IndexConfig config();
  public abstract int start();
  public abstract int limit();

  public QueryOptions withLimit(int newLimit) {
    return create(config(), start(), newLimit);
  }

  public QueryOptions withStart(int newStart) {
    return create(config(), newStart, limit());
  }
}