/*
* 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 static com.amazonaws.util.StringUtils.UTF8;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.io.Writer;
import com.amazonaws.AmazonClientException;
import com.amazonaws.Request;
import com.amazonaws.DefaultRequest;
import com.amazonaws.http.HttpMethodName;
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.StringInputStream;
import com.amazonaws.util.json.AwsJsonWriter;
import com.amazonaws.util.json.JsonUtils;
/**
* JSON request marshaller for ScanRequest
*/
public class ScanRequestMarshaller implements Marshaller<Request<ScanRequest>, ScanRequest> {
public Request<ScanRequest> marshall(ScanRequest scanRequest) {
if (scanRequest == null) {
throw new AmazonClientException("Invalid argument passed to marshall(ScanRequest)");
}
Request<ScanRequest> request = new DefaultRequest<ScanRequest>(scanRequest,
"AmazonDynamoDB");
String target = "DynamoDB_20120810.Scan";
request.addHeader("X-Amz-Target", target);
request.setHttpMethod(HttpMethodName.POST);
String uriResourcePath = "/";
request.setResourcePath(uriResourcePath);
try {
StringWriter stringWriter = new StringWriter();
AwsJsonWriter jsonWriter = JsonUtils.getJsonWriter(stringWriter);
jsonWriter.beginObject();
if (scanRequest.getTableName() != null) {
String tableName = scanRequest.getTableName();
jsonWriter.name("TableName");
jsonWriter.value(tableName);
}
if (scanRequest.getIndexName() != null) {
String indexName = scanRequest.getIndexName();
jsonWriter.name("IndexName");
jsonWriter.value(indexName);
}
if (scanRequest.getAttributesToGet() != null) {
java.util.List<String> attributesToGet = scanRequest.getAttributesToGet();
jsonWriter.name("AttributesToGet");
jsonWriter.beginArray();
for (String attributesToGetItem : attributesToGet) {
if (attributesToGetItem != null) {
jsonWriter.value(attributesToGetItem);
}
}
jsonWriter.endArray();
}
if (scanRequest.getLimit() != null) {
Integer limit = scanRequest.getLimit();
jsonWriter.name("Limit");
jsonWriter.value(limit);
}
if (scanRequest.getSelect() != null) {
String select = scanRequest.getSelect();
jsonWriter.name("Select");
jsonWriter.value(select);
}
if (scanRequest.getScanFilter() != null) {
java.util.Map<String, Condition> scanFilter = scanRequest.getScanFilter();
jsonWriter.name("ScanFilter");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, Condition> scanFilterEntry : scanFilter.entrySet()) {
Condition scanFilterValue = scanFilterEntry.getValue();
if (scanFilterValue != null) {
jsonWriter.name(scanFilterEntry.getKey());
ConditionJsonMarshaller.getInstance().marshall(scanFilterValue, jsonWriter);
}
}
jsonWriter.endObject();
}
if (scanRequest.getConditionalOperator() != null) {
String conditionalOperator = scanRequest.getConditionalOperator();
jsonWriter.name("ConditionalOperator");
jsonWriter.value(conditionalOperator);
}
if (scanRequest.getExclusiveStartKey() != null) {
java.util.Map<String, AttributeValue> exclusiveStartKey = scanRequest
.getExclusiveStartKey();
jsonWriter.name("ExclusiveStartKey");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, AttributeValue> exclusiveStartKeyEntry : exclusiveStartKey
.entrySet()) {
AttributeValue exclusiveStartKeyValue = exclusiveStartKeyEntry.getValue();
if (exclusiveStartKeyValue != null) {
jsonWriter.name(exclusiveStartKeyEntry.getKey());
AttributeValueJsonMarshaller.getInstance().marshall(exclusiveStartKeyValue,
jsonWriter);
}
}
jsonWriter.endObject();
}
if (scanRequest.getReturnConsumedCapacity() != null) {
String returnConsumedCapacity = scanRequest.getReturnConsumedCapacity();
jsonWriter.name("ReturnConsumedCapacity");
jsonWriter.value(returnConsumedCapacity);
}
if (scanRequest.getTotalSegments() != null) {
Integer totalSegments = scanRequest.getTotalSegments();
jsonWriter.name("TotalSegments");
jsonWriter.value(totalSegments);
}
if (scanRequest.getSegment() != null) {
Integer segment = scanRequest.getSegment();
jsonWriter.name("Segment");
jsonWriter.value(segment);
}
if (scanRequest.getProjectionExpression() != null) {
String projectionExpression = scanRequest.getProjectionExpression();
jsonWriter.name("ProjectionExpression");
jsonWriter.value(projectionExpression);
}
if (scanRequest.getFilterExpression() != null) {
String filterExpression = scanRequest.getFilterExpression();
jsonWriter.name("FilterExpression");
jsonWriter.value(filterExpression);
}
if (scanRequest.getExpressionAttributeNames() != null) {
java.util.Map<String, String> expressionAttributeNames = scanRequest
.getExpressionAttributeNames();
jsonWriter.name("ExpressionAttributeNames");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, String> expressionAttributeNamesEntry : expressionAttributeNames
.entrySet()) {
String expressionAttributeNamesValue = expressionAttributeNamesEntry.getValue();
if (expressionAttributeNamesValue != null) {
jsonWriter.name(expressionAttributeNamesEntry.getKey());
jsonWriter.value(expressionAttributeNamesValue);
}
}
jsonWriter.endObject();
}
if (scanRequest.getExpressionAttributeValues() != null) {
java.util.Map<String, AttributeValue> expressionAttributeValues = scanRequest
.getExpressionAttributeValues();
jsonWriter.name("ExpressionAttributeValues");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, AttributeValue> expressionAttributeValuesEntry : expressionAttributeValues
.entrySet()) {
AttributeValue expressionAttributeValuesValue = expressionAttributeValuesEntry
.getValue();
if (expressionAttributeValuesValue != null) {
jsonWriter.name(expressionAttributeValuesEntry.getKey());
AttributeValueJsonMarshaller.getInstance().marshall(
expressionAttributeValuesValue, jsonWriter);
}
}
jsonWriter.endObject();
}
if (scanRequest.getConsistentRead() != null) {
Boolean consistentRead = scanRequest.getConsistentRead();
jsonWriter.name("ConsistentRead");
jsonWriter.value(consistentRead);
}
jsonWriter.endObject();
jsonWriter.close();
String snippet = stringWriter.toString();
byte[] content = snippet.getBytes(UTF8);
request.setContent(new StringInputStream(snippet));
request.addHeader("Content-Length", Integer.toString(content.length));
} catch (Throwable t) {
throw new AmazonClientException(
"Unable to marshall request to JSON: " + t.getMessage(), t);
}
if (!request.getHeaders().containsKey("Content-Type")) {
request.addHeader("Content-Type", "application/x-amz-json-1.0");
}
return request;
}
}