/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.action.admin.indices.settings.put;

import org.elasticsearch.cluster.ack.IndicesClusterStateUpdateRequest;
import org.elasticsearch.common.settings.Settings;

/**
 * Cluster state update request that allows to update settings for some indices
 */
public class UpdateSettingsClusterStateUpdateRequest extends IndicesClusterStateUpdateRequest<UpdateSettingsClusterStateUpdateRequest> {

    private Settings settings;

    private boolean preserveExisting = false;

    /**
     * Returns <code>true</code> iff the settings update should only add but not update settings. If the setting already exists
     * it should not be overwritten by this update. The default is <code>false</code>
     */
    public boolean isPreserveExisting() {
        return preserveExisting;
    }

    /**
     * Iff set to <code>true</code> this settings update will only add settings not already set on an index. Existing settings remain
     * unchanged.
     */
    public UpdateSettingsClusterStateUpdateRequest setPreserveExisting(boolean preserveExisting) {
        this.preserveExisting = preserveExisting;
        return this;
    }

    /**
     * Returns the {@link Settings} to update
     */
    public Settings settings() {
        return settings;
    }

    /**
     * Sets the {@link Settings} to update
     */
    public UpdateSettingsClusterStateUpdateRequest settings(Settings settings) {
        this.settings = settings;
        return this;
    }
}