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There is a newer version: 8.14.0

/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */
package org.elasticsearch.common.xcontent;

import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.xcontent.ToXContentObject;
import org.elasticsearch.xcontent.XContentBuilder;

import java.io.IOException;

/**
 * Objects that can both render themselves in as json/yaml/etc and can provide a {@link RestStatus} for their response. Usually should be
 * implemented by top level responses sent back to users from REST endpoints.
 */
public interface StatusToXContentObject extends ToXContentObject {

    /**
     * Returns the REST status to make sure it is returned correctly
     */
    RestStatus status();

    static StatusToXContentObject withStatus(RestStatus status, ToXContentObject xContent) {
        return new StatusToXContentObject() {
            @Override
            public RestStatus status() {
                return status;
            }

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