/*
* 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 QueryRequest
*/
public class QueryRequestMarshaller implements Marshaller<Request<QueryRequest>, QueryRequest> {
public Request<QueryRequest> marshall(QueryRequest queryRequest) {
if (queryRequest == null) {
throw new AmazonClientException("Invalid argument passed to marshall(QueryRequest)");
}
Request<QueryRequest> request = new DefaultRequest<QueryRequest>(queryRequest,
"AmazonDynamoDB");
String target = "DynamoDB_20120810.Query";
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 (queryRequest.getTableName() != null) {
String tableName = queryRequest.getTableName();
jsonWriter.name("TableName");
jsonWriter.value(tableName);
}
if (queryRequest.getIndexName() != null) {
String indexName = queryRequest.getIndexName();
jsonWriter.name("IndexName");
jsonWriter.value(indexName);
}
if (queryRequest.getSelect() != null) {
String select = queryRequest.getSelect();
jsonWriter.name("Select");
jsonWriter.value(select);
}
if (queryRequest.getAttributesToGet() != null) {
java.util.List<String> attributesToGet = queryRequest.getAttributesToGet();
jsonWriter.name("AttributesToGet");
jsonWriter.beginArray();
for (String attributesToGetItem : attributesToGet) {
if (attributesToGetItem != null) {
jsonWriter.value(attributesToGetItem);
}
}
jsonWriter.endArray();
}
if (queryRequest.getLimit() != null) {
Integer limit = queryRequest.getLimit();
jsonWriter.name("Limit");
jsonWriter.value(limit);
}
if (queryRequest.getConsistentRead() != null) {
Boolean consistentRead = queryRequest.getConsistentRead();
jsonWriter.name("ConsistentRead");
jsonWriter.value(consistentRead);
}
if (queryRequest.getKeyConditions() != null) {
java.util.Map<String, Condition> keyConditions = queryRequest.getKeyConditions();
jsonWriter.name("KeyConditions");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, Condition> keyConditionsEntry : keyConditions
.entrySet()) {
Condition keyConditionsValue = keyConditionsEntry.getValue();
if (keyConditionsValue != null) {
jsonWriter.name(keyConditionsEntry.getKey());
ConditionJsonMarshaller.getInstance().marshall(keyConditionsValue,
jsonWriter);
}
}
jsonWriter.endObject();
}
if (queryRequest.getQueryFilter() != null) {
java.util.Map<String, Condition> queryFilter = queryRequest.getQueryFilter();
jsonWriter.name("QueryFilter");
jsonWriter.beginObject();
for (java.util.Map.Entry<String, Condition> queryFilterEntry : queryFilter
.entrySet()) {
Condition queryFilterValue = queryFilterEntry.getValue();
if (queryFilterValue != null) {
jsonWriter.name(queryFilterEntry.getKey());
ConditionJsonMarshaller.getInstance()
.marshall(queryFilterValue, jsonWriter);
}
}
jsonWriter.endObject();
}
if (queryRequest.getConditionalOperator() != null) {
String conditionalOperator = queryRequest.getConditionalOperator();
jsonWriter.name("ConditionalOperator");
jsonWriter.value(conditionalOperator);
}
if (queryRequest.getScanIndexForward() != null) {
Boolean scanIndexForward = queryRequest.getScanIndexForward();
jsonWriter.name("ScanIndexForward");
jsonWriter.value(scanIndexForward);
}
if (queryRequest.getExclusiveStartKey() != null) {
java.util.Map<String, AttributeValue> exclusiveStartKey = queryRequest
.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 (queryRequest.getReturnConsumedCapacity() != null) {
String returnConsumedCapacity = queryRequest.getReturnConsumedCapacity();
jsonWriter.name("ReturnConsumedCapacity");
jsonWriter.value(returnConsumedCapacity);
}
if (queryRequest.getProjectionExpression() != null) {
String projectionExpression = queryRequest.getProjectionExpression();
jsonWriter.name("ProjectionExpression");
jsonWriter.value(projectionExpression);
}
if (queryRequest.getFilterExpression() != null) {
String filterExpression = queryRequest.getFilterExpression();
jsonWriter.name("FilterExpression");
jsonWriter.value(filterExpression);
}
if (queryRequest.getKeyConditionExpression() != null) {
String keyConditionExpression = queryRequest.getKeyConditionExpression();
jsonWriter.name("KeyConditionExpression");
jsonWriter.value(keyConditionExpression);
}
if (queryRequest.getExpressionAttributeNames() != null) {
java.util.Map<String, String> expressionAttributeNames = queryRequest
.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 (queryRequest.getExpressionAttributeValues() != null) {
java.util.Map<String, AttributeValue> expressionAttributeValues = queryRequest
.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();
}
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;
}
}