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The AWS Java SDK for Amazon SQS module holds the client classes that are used for communicating with Amazon Simple Queue Service

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/*
 * Copyright 2010-2016 Amazon.com, Inc. or its affiliates. All Rights
 * Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file 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 com.amazonaws.services.sqs.model.transform;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.amazonaws.AmazonClientException;
import com.amazonaws.Request;
import com.amazonaws.DefaultRequest;
import com.amazonaws.http.HttpMethodName;
import com.amazonaws.services.sqs.model.*;
import com.amazonaws.transform.Marshaller;
import com.amazonaws.util.StringUtils;
import com.amazonaws.util.IdempotentUtils;

/**
 * GetQueueAttributesRequest Marshaller
 */

public class GetQueueAttributesRequestMarshaller
        implements
        Marshaller, GetQueueAttributesRequest> {

    public Request marshall(
            GetQueueAttributesRequest getQueueAttributesRequest) {

        if (getQueueAttributesRequest == null) {
            throw new AmazonClientException(
                    "Invalid argument passed to marshall(...)");
        }

        Request request = new DefaultRequest(
                getQueueAttributesRequest, "AmazonSQS");
        request.addParameter("Action", "GetQueueAttributes");
        request.addParameter("Version", "2012-11-05");
        request.setHttpMethod(HttpMethodName.POST);

        if (getQueueAttributesRequest.getQueueUrl() != null) {
            request.addParameter("QueueUrl", StringUtils
                    .fromString(getQueueAttributesRequest.getQueueUrl()));
        }

        com.amazonaws.internal.SdkInternalList attributeNamesList = (com.amazonaws.internal.SdkInternalList) getQueueAttributesRequest
                .getAttributeNames();
        if (!attributeNamesList.isEmpty()
                || !attributeNamesList.isAutoConstruct()) {
            int attributeNamesListIndex = 1;

            for (String attributeNamesListValue : attributeNamesList) {
                if (attributeNamesListValue != null) {
                    request.addParameter("AttributeName."
                            + attributeNamesListIndex,
                            StringUtils.fromString(attributeNamesListValue));
                }
                attributeNamesListIndex++;
            }
        }

        return request;
    }

}