/*
 * 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", the "GNU Affero General Public License v3.0 only", 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", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */

package org.elasticsearch.action.get;

import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.common.io.stream.Writeable;

import java.io.IOException;

/**
 * A single multi get response.
 */
public class MultiGetItemResponse implements Writeable {

    private final GetResponse response;
    private final MultiGetResponse.Failure failure;

    public MultiGetItemResponse(GetResponse response, MultiGetResponse.Failure failure) {
        this.response = response;
        this.failure = failure;
    }

    /**
     * The index name of the document.
     */
    public String getIndex() {
        if (failure != null) {
            return failure.getIndex();
        }
        return response.getIndex();
    }

    /**
     * The id of the document.
     */
    public String getId() {
        if (failure != null) {
            return failure.getId();
        }
        return response.getId();
    }

    /**
     * Is this a failed execution?
     */
    public boolean isFailed() {
        return failure != null;
    }

    /**
     * The actual get response, {@code null} if its a failure.
     */
    public GetResponse getResponse() {
        return this.response;
    }

    /**
     * The failure if relevant.
     */
    public MultiGetResponse.Failure getFailure() {
        return this.failure;
    }

    @Override
    public void writeTo(StreamOutput out) throws IOException {
        if (failure != null) {
            out.writeBoolean(true);
            failure.writeTo(out);
        } else {
            out.writeBoolean(false);
            response.writeTo(out);
        }
    }
}