com.amazonaws.services.dynamodbv2.model.transform.KeysAndAttributesJsonMarshaller Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of aws-java-sdk-dynamodb Show documentation
The AWS Java SDK for Amazon DynamoDB module holds the client classes that are used for communicating with Amazon DynamoDB Service
There is a newer version: 1.12.772
Show newest version
/*
 * 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.dynamodbv2.model.transform;

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

import com.amazonaws.AmazonClientException;
import com.amazonaws.services.dynamodbv2.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.util.json.*;

/**
 * KeysAndAttributesMarshaller
 */
public class KeysAndAttributesJsonMarshaller {

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

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

        try {
            jsonGenerator.writeStartObject();

            java.util.List> keysList = keysAndAttributes
                    .getKeys();
            if (keysList != null) {
                jsonGenerator.writeFieldName("Keys");
                jsonGenerator.writeStartArray();
                for (java.util.Map keysListValue : keysList) {
                    if (keysListValue != null) {

                        jsonGenerator.writeStartObject();
                        for (Map.Entry KeysListMapEntry : keysListValue
                                .entrySet()) {
                            if (KeysListMapEntry.getValue() != null) {
                                jsonGenerator.writeFieldName(KeysListMapEntry
                                        .getKey());
                                AttributeValueJsonMarshaller.getInstance()
                                        .marshall(KeysListMapEntry.getValue(),
                                                jsonGenerator);
                            }
                        }
                        jsonGenerator.writeEndObject();
                    }
                }
                jsonGenerator.writeEndArray();
            }

            java.util.List attributesToGetList = keysAndAttributes
                    .getAttributesToGet();
            if (attributesToGetList != null) {
                jsonGenerator.writeFieldName("AttributesToGet");
                jsonGenerator.writeStartArray();
                for (String attributesToGetListValue : attributesToGetList) {
                    if (attributesToGetListValue != null) {
                        jsonGenerator.writeValue(attributesToGetListValue);
                    }
                }
                jsonGenerator.writeEndArray();
            }
            if (keysAndAttributes.getConsistentRead() != null) {
                jsonGenerator.writeFieldName("ConsistentRead").writeValue(
                        keysAndAttributes.getConsistentRead());
            }
            if (keysAndAttributes.getProjectionExpression() != null) {
                jsonGenerator
                        .writeFieldName("ProjectionExpression")
                        .writeValue(keysAndAttributes.getProjectionExpression());
            }

            java.util.Map expressionAttributeNamesMap = keysAndAttributes
                    .getExpressionAttributeNames();
            if (expressionAttributeNamesMap != null) {
                jsonGenerator.writeFieldName("ExpressionAttributeNames");
                jsonGenerator.writeStartObject();

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

                        jsonGenerator
                                .writeValue(expressionAttributeNamesMapValue
                                        .getValue());
                    }
                }
                jsonGenerator.writeEndObject();
            }

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

    private static KeysAndAttributesJsonMarshaller instance;

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

}