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/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * 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.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.client.indices;

import org.opensearch.cluster.metadata.MappingMetadata;
import org.opensearch.common.ParseField;
import org.opensearch.common.xcontent.XContentParser;
import org.opensearch.common.xcontent.XContentParserUtils;
import org.opensearch.index.mapper.MapperService;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class GetMappingsResponse {

    static final ParseField MAPPINGS = new ParseField("mappings");

    private Map mappings;

    public GetMappingsResponse(Map mappings) {
        this.mappings = mappings;
    }

    public Map mappings() {
        return mappings;
    }

    public static GetMappingsResponse fromXContent(XContentParser parser) throws IOException {
        if (parser.currentToken() == null) {
            parser.nextToken();
        }

        XContentParserUtils.ensureExpectedToken(parser.currentToken(), XContentParser.Token.START_OBJECT, parser);

        Map parts = parser.map();

        Map mappings = new HashMap<>();
        for (Map.Entry entry : parts.entrySet()) {
            String indexName = entry.getKey();
            assert entry.getValue() instanceof Map : "expected a map as type mapping, but got: " + entry.getValue().getClass();

            @SuppressWarnings("unchecked")
            final Map fieldMappings = (Map) ((Map) entry.getValue()).get(
                MAPPINGS.getPreferredName()
            );

            mappings.put(indexName, new MappingMetadata(MapperService.SINGLE_MAPPING_NAME, fieldMappings));
        }

        return new GetMappingsResponse(mappings);
    }
}