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  /*
   * Copyright 2015-2015 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.machinelearning.internal;
 
 import java.util.UUID;
 
CreateXxx API calls require a unique (for all time!) ID parameter for idempotency. If the user doesn't specify one, fill in a GUID.
 
 public class RandomIdHandler extends RequestHandler2 {
 
     @Override
             AmazonWebServiceRequest request) {
 
         if (request instanceof CreateBatchPredictionRequest) {
             CreateBatchPredictionRequest copy =
                     (CreateBatchPredictionRequestrequest;
 
             if (copy.getBatchPredictionId() == null) {
                 copy = copy.clone();
                 copy.setBatchPredictionId(UUID.randomUUID().toString());
             }
 
             return copy;
         } else if (request instanceof CreateDataSourceFromRDSRequest) {
             CreateDataSourceFromRDSRequest copy =
                     (CreateDataSourceFromRDSRequestrequest;
 
             if (copy.getDataSourceId() == null) {
                 copy = copy.clone();
                 copy.setDataSourceId(UUID.randomUUID().toString());
             }
 
             return copy;
         } else if (request instanceof CreateDataSourceFromRedshiftRequest) {
             CreateDataSourceFromRedshiftRequest copy =
                     (CreateDataSourceFromRedshiftRequestrequest;
 
             if (copy.getDataSourceId() == null) {
                 copy = copy.clone();
                 copy.setDataSourceId(UUID.randomUUID().toString());
             }
 
             return copy;
         } else if (request instanceof CreateDataSourceFromS3Request) {
             CreateDataSourceFromS3Request copy =
                     (CreateDataSourceFromS3Requestrequest;
 
             if (copy.getDataSourceId() == null) {
                 copy = copy.clone();
                 copy.setDataSourceId(UUID.randomUUID().toString());
             }
 
             return copy;
         } else if (request instanceof CreateEvaluationRequest) {
             CreateEvaluationRequest copy =
                     (CreateEvaluationRequestrequest;
 
             if (copy.getEvaluationId() == null) {
                 copy = copy.clone();
                 copy.setEvaluationId(UUID.randomUUID().toString());
             }
 
             return copy;
         } else if (request instanceof CreateMLModelRequest) {
             CreateMLModelRequest copy = (CreateMLModelRequestrequest;
 
             if (copy.getMLModelId() == null) {
                 copy = copy.clone();
                 copy.setMLModelId(UUID.randomUUID().toString());
             }
 
             return copy;
         }
        return request;
    }
    @Override
    public void beforeRequest(Request<?> request) {
    }
    @Override
    public void afterResponse(Request<?> requestResponse<?> response) {
    }
    @Override
    public void afterError(Request<?> requestResponse<?> responseException e) {
    }
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