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/*
 * 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.fieldstats;

import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.ValidateActions;
import org.elasticsearch.action.support.broadcast.BroadcastOperationRequest;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;

import java.io.IOException;

/**
 */
public class FieldStatsRequest extends BroadcastOperationRequest {

    public final static String DEFAULT_LEVEL = "cluster";

    private String[] fields;
    private String level = DEFAULT_LEVEL;

    public String[] fields() {
        return fields;
    }

    public void fields(String[] fields) {
        this.fields = fields;
    }

    public String level() {
        return level;
    }

    public void level(String level) {
        this.level = level;
    }

    @Override
    public ActionRequestValidationException validate() {
        ActionRequestValidationException validationException = super.validate();
        if ("cluster".equals(level) == false && "indices".equals(level) == false) {
            validationException = ValidateActions.addValidationError("invalid level option [" + level + "]", validationException);
        }
        return validationException;
    }

    @Override
    public void readFrom(StreamInput in) throws IOException {
        super.readFrom(in);
        fields = in.readStringArray();
        level = in.readString();
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        super.writeTo(out);
        out.writeStringArrayNullable(fields);
        out.writeString(level);
    }
}