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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.dataframe;

import org.elasticsearch.common.Strings;
import org.elasticsearch.common.xcontent.ToXContentObject;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.index.query.AbstractQueryBuilder;
import org.elasticsearch.index.query.QueryBuilder;

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

import static java.util.Objects.requireNonNull;

/**
 * Object for encapsulating the desired Query for a DataFrameAnalysis
 */
public class QueryConfig implements ToXContentObject {

    public static QueryConfig fromXContent(XContentParser parser) throws IOException {
        QueryBuilder query = AbstractQueryBuilder.parseInnerQueryBuilder(parser);
        return new QueryConfig(query);
    }

    private final QueryBuilder query;

    public QueryConfig(QueryBuilder query) {
        this.query = requireNonNull(query);
    }

    public QueryConfig(QueryConfig queryConfig) {
        this(requireNonNull(queryConfig).query);
    }

    @Override
    public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
        query.toXContent(builder, params);
        return builder;
    }

    public QueryBuilder getQuery() {
        return query;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        QueryConfig other = (QueryConfig) o;
        return Objects.equals(query, other.query);
    }

    @Override
    public int hashCode() {
        return Objects.hash(query);
    }

    @Override
    public String toString() {
        return Strings.toString(this);
    }
}