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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.client.ml;

import org.elasticsearch.client.ml.job.results.Bucket;
import org.elasticsearch.common.ParseField;
import org.elasticsearch.common.xcontent.ConstructingObjectParser;
import org.elasticsearch.common.xcontent.XContentParser;

import java.io.IOException;
import java.util.List;
import java.util.Objects;

/**
 * A response containing the requested buckets
 */
public class GetBucketsResponse extends AbstractResultResponse {

    public static final ParseField BUCKETS = new ParseField("buckets");

    @SuppressWarnings("unchecked")
    public static final ConstructingObjectParser PARSER = new ConstructingObjectParser<>("get_buckets_response",
            true, a -> new GetBucketsResponse((List) a[0], (long) a[1]));

    static {
        PARSER.declareObjectArray(ConstructingObjectParser.constructorArg(), Bucket.PARSER, BUCKETS);
        PARSER.declareLong(ConstructingObjectParser.constructorArg(), COUNT);
    }

    public static GetBucketsResponse fromXContent(XContentParser parser) throws IOException {
        return PARSER.parse(parser, null);
    }

    GetBucketsResponse(List buckets, long count) {
        super(BUCKETS, buckets, count);
    }

    /**
     * The retrieved buckets
     * @return the retrieved buckets
     */
    public List buckets() {
        return results;
    }

    @Override
    public int hashCode() {
        return Objects.hash(count, results);
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        GetBucketsResponse other = (GetBucketsResponse) obj;
        return count == other.count && Objects.equals(results, other.results);
    }
}