com.amazonaws.services.dynamodbv2.model.transform.QueryRequestMarshaller Maven / Gradle / Ivy
/*
* 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 java.util.Map;
import java.util.List;
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;
/**
* Query Request Marshaller
*/
public class QueryRequestMarshaller implements Marshaller, QueryRequest> {
public Request marshall(QueryRequest queryRequest) {
if (queryRequest == null) {
throw new AmazonClientException("Invalid argument passed to marshall(...)");
}
Request request = new DefaultRequest(queryRequest, "AmazonDynamoDBv2");
String target = "DynamoDB_20120810.Query";
request.addHeader("X-Amz-Target", target);
request.setHttpMethod(HttpMethodName.POST);
request.setResourcePath("");
try {
StringWriter stringWriter = new StringWriter();
AwsJsonWriter jsonWriter = JsonUtils.getJsonWriter(stringWriter);
jsonWriter.beginObject();
if (queryRequest.getTableName() != null) {
jsonWriter.name("TableName").value(queryRequest.getTableName());
}
if (queryRequest.getIndexName() != null) {
jsonWriter.name("IndexName").value(queryRequest.getIndexName());
}
if (queryRequest.getSelect() != null) {
jsonWriter.name("Select").value(queryRequest.getSelect());
}
com.amazonaws.internal.ListWithAutoConstructFlag attributesToGetList = (com.amazonaws.internal.ListWithAutoConstructFlag)(queryRequest.getAttributesToGet());
if (attributesToGetList != null && !(attributesToGetList.isAutoConstruct() && attributesToGetList.isEmpty())) {
jsonWriter.name("AttributesToGet");
jsonWriter.beginArray();
for (String attributesToGetListValue : attributesToGetList) {
if (attributesToGetListValue != null) {
jsonWriter.value(attributesToGetListValue);
}
}
jsonWriter.endArray();
}
if (queryRequest.getLimit() != null) {
jsonWriter.name("Limit").value(queryRequest.getLimit());
}
if (queryRequest.isConsistentRead() != null) {
jsonWriter.name("ConsistentRead").value(queryRequest.isConsistentRead());
}
if (queryRequest.getKeyConditions() != null) {
jsonWriter.name("KeyConditions");
jsonWriter.beginObject();
for (Map.Entry keyConditionsListValue : queryRequest.getKeyConditions().entrySet()) {
if (keyConditionsListValue.getValue() != null) {
jsonWriter.name(keyConditionsListValue.getKey());
jsonWriter.beginObject();
com.amazonaws.internal.ListWithAutoConstructFlag attributeValueListList = (com.amazonaws.internal.ListWithAutoConstructFlag)(keyConditionsListValue.getValue().getAttributeValueList());
if (attributeValueListList != null && !(attributeValueListList.isAutoConstruct() && attributeValueListList.isEmpty())) {
jsonWriter.name("AttributeValueList");
jsonWriter.beginArray();
for (AttributeValue attributeValueListListValue : attributeValueListList) {
if (attributeValueListListValue != null) {
AttributeValueJsonMarshaller.getInstance().marshall(attributeValueListListValue, jsonWriter);
}
}
jsonWriter.endArray();
}
if (keyConditionsListValue.getValue().getComparisonOperator() != null) {
jsonWriter.name("ComparisonOperator").value(keyConditionsListValue.getValue().getComparisonOperator());
}
jsonWriter.endObject();
}
}
jsonWriter.endObject();
}
if (queryRequest.getQueryFilter() != null) {
jsonWriter.name("QueryFilter");
jsonWriter.beginObject();
for (Map.Entry queryFilterListValue : queryRequest.getQueryFilter().entrySet()) {
if (queryFilterListValue.getValue() != null) {
jsonWriter.name(queryFilterListValue.getKey());
jsonWriter.beginObject();
com.amazonaws.internal.ListWithAutoConstructFlag attributeValueListList = (com.amazonaws.internal.ListWithAutoConstructFlag)(queryFilterListValue.getValue().getAttributeValueList());
if (attributeValueListList != null && !(attributeValueListList.isAutoConstruct() && attributeValueListList.isEmpty())) {
jsonWriter.name("AttributeValueList");
jsonWriter.beginArray();
for (AttributeValue attributeValueListListValue : attributeValueListList) {
if (attributeValueListListValue != null) {
AttributeValueJsonMarshaller.getInstance().marshall(attributeValueListListValue, jsonWriter);
}
}
jsonWriter.endArray();
}
if (queryFilterListValue.getValue().getComparisonOperator() != null) {
jsonWriter.name("ComparisonOperator").value(queryFilterListValue.getValue().getComparisonOperator());
}
jsonWriter.endObject();
}
}
jsonWriter.endObject();
}
if (queryRequest.getConditionalOperator() != null) {
jsonWriter.name("ConditionalOperator").value(queryRequest.getConditionalOperator());
}
if (queryRequest.isScanIndexForward() != null) {
jsonWriter.name("ScanIndexForward").value(queryRequest.isScanIndexForward());
}
if (queryRequest.getExclusiveStartKey() != null) {
jsonWriter.name("ExclusiveStartKey");
jsonWriter.beginObject();
for (Map.Entry exclusiveStartKeyListValue : queryRequest.getExclusiveStartKey().entrySet()) {
if (exclusiveStartKeyListValue.getValue() != null) {
jsonWriter.name(exclusiveStartKeyListValue.getKey());
AttributeValueJsonMarshaller.getInstance().marshall(exclusiveStartKeyListValue.getValue(), jsonWriter);
}
}
jsonWriter.endObject();
}
if (queryRequest.getReturnConsumedCapacity() != null) {
jsonWriter.name("ReturnConsumedCapacity").value(queryRequest.getReturnConsumedCapacity());
}
if (queryRequest.getProjectionExpression() != null) {
jsonWriter.name("ProjectionExpression").value(queryRequest.getProjectionExpression());
}
if (queryRequest.getFilterExpression() != null) {
jsonWriter.name("FilterExpression").value(queryRequest.getFilterExpression());
}
if (queryRequest.getKeyConditionExpression() != null) {
jsonWriter.name("KeyConditionExpression").value(queryRequest.getKeyConditionExpression());
}
if (queryRequest.getExpressionAttributeNames() != null) {
jsonWriter.name("ExpressionAttributeNames");
jsonWriter.beginObject();
for (Map.Entry expressionAttributeNamesListValue : queryRequest.getExpressionAttributeNames().entrySet()) {
if (expressionAttributeNamesListValue.getValue() != null) {
jsonWriter.name(expressionAttributeNamesListValue.getKey());
jsonWriter.value(expressionAttributeNamesListValue.getValue());
}
}
jsonWriter.endObject();
}
if (queryRequest.getExpressionAttributeValues() != null) {
jsonWriter.name("ExpressionAttributeValues");
jsonWriter.beginObject();
for (Map.Entry expressionAttributeValuesListValue : queryRequest.getExpressionAttributeValues().entrySet()) {
if (expressionAttributeValuesListValue.getValue() != null) {
jsonWriter.name(expressionAttributeValuesListValue.getKey());
AttributeValueJsonMarshaller.getInstance().marshall(expressionAttributeValuesListValue.getValue(), 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));
request.addHeader("Content-Type", "application/x-amz-json-1.0");
} catch(Throwable t) {
throw new AmazonClientException("Unable to marshall request to JSON: " + t.getMessage(), t);
}
return request;
}
}
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