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The AWS Java SDK for Amazon Machine Learning module holds the client classes that is used for communicating with Amazon Machine Learning 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.machinelearning.model.transform;

import java.util.Map;
import java.util.Map.Entry;
import java.math.*;
import java.nio.ByteBuffer;

import com.amazonaws.services.machinelearning.model.*;
import com.amazonaws.transform.SimpleTypeJsonUnmarshallers.*;
import com.amazonaws.transform.*;

import com.fasterxml.jackson.core.JsonToken;
import static com.fasterxml.jackson.core.JsonToken.*;

/**
 * DataSource JSON Unmarshaller
 */
public class DataSourceJsonUnmarshaller implements
        Unmarshaller {

    public DataSource unmarshall(JsonUnmarshallerContext context)
            throws Exception {
        DataSource dataSource = new DataSource();

        int originalDepth = context.getCurrentDepth();
        String currentParentElement = context.getCurrentParentElement();
        int targetDepth = originalDepth + 1;

        JsonToken token = context.getCurrentToken();
        if (token == null)
            token = context.nextToken();
        if (token == VALUE_NULL)
            return null;

        while (true) {
            if (token == null)
                break;

            if (token == FIELD_NAME || token == START_OBJECT) {
                if (context.testExpression("DataSourceId", targetDepth)) {
                    context.nextToken();
                    dataSource.setDataSourceId(context.getUnmarshaller(
                            String.class).unmarshall(context));
                }
                if (context.testExpression("DataLocationS3", targetDepth)) {
                    context.nextToken();
                    dataSource.setDataLocationS3(context.getUnmarshaller(
                            String.class).unmarshall(context));
                }
                if (context.testExpression("DataRearrangement", targetDepth)) {
                    context.nextToken();
                    dataSource.setDataRearrangement(context.getUnmarshaller(
                            String.class).unmarshall(context));
                }
                if (context.testExpression("CreatedByIamUser", targetDepth)) {
                    context.nextToken();
                    dataSource.setCreatedByIamUser(context.getUnmarshaller(
                            String.class).unmarshall(context));
                }
                if (context.testExpression("CreatedAt", targetDepth)) {
                    context.nextToken();
                    dataSource.setCreatedAt(context.getUnmarshaller(
                            java.util.Date.class).unmarshall(context));
                }
                if (context.testExpression("LastUpdatedAt", targetDepth)) {
                    context.nextToken();
                    dataSource.setLastUpdatedAt(context.getUnmarshaller(
                            java.util.Date.class).unmarshall(context));
                }
                if (context.testExpression("DataSizeInBytes", targetDepth)) {
                    context.nextToken();
                    dataSource.setDataSizeInBytes(context.getUnmarshaller(
                            Long.class).unmarshall(context));
                }
                if (context.testExpression("NumberOfFiles", targetDepth)) {
                    context.nextToken();
                    dataSource.setNumberOfFiles(context.getUnmarshaller(
                            Long.class).unmarshall(context));
                }
                if (context.testExpression("Name", targetDepth)) {
                    context.nextToken();
                    dataSource.setName(context.getUnmarshaller(String.class)
                            .unmarshall(context));
                }
                if (context.testExpression("Status", targetDepth)) {
                    context.nextToken();
                    dataSource.setStatus(context.getUnmarshaller(String.class)
                            .unmarshall(context));
                }
                if (context.testExpression("Message", targetDepth)) {
                    context.nextToken();
                    dataSource.setMessage(context.getUnmarshaller(String.class)
                            .unmarshall(context));
                }
                if (context.testExpression("RedshiftMetadata", targetDepth)) {
                    context.nextToken();
                    dataSource
                            .setRedshiftMetadata(RedshiftMetadataJsonUnmarshaller
                                    .getInstance().unmarshall(context));
                }
                if (context.testExpression("RDSMetadata", targetDepth)) {
                    context.nextToken();
                    dataSource.setRDSMetadata(RDSMetadataJsonUnmarshaller
                            .getInstance().unmarshall(context));
                }
                if (context.testExpression("RoleARN", targetDepth)) {
                    context.nextToken();
                    dataSource.setRoleARN(context.getUnmarshaller(String.class)
                            .unmarshall(context));
                }
                if (context.testExpression("ComputeStatistics", targetDepth)) {
                    context.nextToken();
                    dataSource.setComputeStatistics(context.getUnmarshaller(
                            Boolean.class).unmarshall(context));
                }
            } else if (token == END_ARRAY || token == END_OBJECT) {
                if (context.getLastParsedParentElement() == null
                        || context.getLastParsedParentElement().equals(
                                currentParentElement)) {
                    if (context.getCurrentDepth() <= originalDepth)
                        break;
                }
            }
            token = context.nextToken();
        }

        return dataSource;
    }

    private static DataSourceJsonUnmarshaller instance;

    public static DataSourceJsonUnmarshaller getInstance() {
        if (instance == null)
            instance = new DataSourceJsonUnmarshaller();
        return instance;
    }
}