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The AWS Java SDK for AWS Data Pipeline module holds the client classes that are used for communicating with AWS Data Pipeline Service

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/*
 * Copyright 2011-2016 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.datapipeline.model.transform;

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

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.datapipeline.model.*;
import com.amazonaws.transform.Marshaller;
import com.amazonaws.util.BinaryUtils;
import com.amazonaws.util.StringUtils;
import com.amazonaws.util.IdempotentUtils;
import com.amazonaws.util.StringInputStream;
import com.amazonaws.protocol.json.*;

/**
 * TaskObjectMarshaller
 */
public class TaskObjectJsonMarshaller {

    /**
     * Marshall the given parameter object, and output to a SdkJsonGenerator
     */
    public void marshall(TaskObject taskObject,
            StructuredJsonGenerator jsonGenerator) {

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

        try {
            jsonGenerator.writeStartObject();

            if (taskObject.getTaskId() != null) {
                jsonGenerator.writeFieldName("taskId").writeValue(
                        taskObject.getTaskId());
            }
            if (taskObject.getPipelineId() != null) {
                jsonGenerator.writeFieldName("pipelineId").writeValue(
                        taskObject.getPipelineId());
            }
            if (taskObject.getAttemptId() != null) {
                jsonGenerator.writeFieldName("attemptId").writeValue(
                        taskObject.getAttemptId());
            }

            java.util.Map objectsMap = taskObject
                    .getObjects();
            if (objectsMap != null) {
                jsonGenerator.writeFieldName("objects");
                jsonGenerator.writeStartObject();

                for (Map.Entry objectsMapValue : objectsMap
                        .entrySet()) {
                    if (objectsMapValue.getValue() != null) {
                        jsonGenerator.writeFieldName(objectsMapValue.getKey());

                        PipelineObjectJsonMarshaller.getInstance().marshall(
                                objectsMapValue.getValue(), jsonGenerator);
                    }
                }
                jsonGenerator.writeEndObject();
            }

            jsonGenerator.writeEndObject();
        } catch (Throwable t) {
            throw new AmazonClientException(
                    "Unable to marshall request to JSON: " + t.getMessage(), t);
        }
    }

    private static TaskObjectJsonMarshaller instance;

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

}