/*
* Copyright 2014-2014 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.document.internal;
import java.util.LinkedHashMap;
import java.util.Map;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.ItemCollection;
import com.amazonaws.services.dynamodbv2.document.Page;
import com.amazonaws.services.dynamodbv2.document.QueryOutcome;
import com.amazonaws.services.dynamodbv2.document.spec.QuerySpec;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.amazonaws.services.dynamodbv2.model.QueryRequest;
import com.amazonaws.services.dynamodbv2.model.QueryResult;
class QueryCollection extends ItemCollection<QueryOutcome>
{
private final AmazonDynamoDB client;
private final QuerySpec spec;
private final Map<String, AttributeValue> startKey;
public QueryCollection(AmazonDynamoDB client, QuerySpec spec) {
this.client = client;
this.spec = spec;
Map<String, AttributeValue> startKey =
spec.getRequest().getExclusiveStartKey();
this.startKey = startKey == null
? null
: new LinkedHashMap<String, AttributeValue>(startKey);
}
@Override
public Page<Item, QueryOutcome> firstPage() {
QueryRequest request = spec.getRequest();
request.setExclusiveStartKey(startKey);
request.setLimit(InternalUtils.minimum(
spec.getMaxResultSize(),
spec.getMaxPageSize()));
QueryResult result = client.query(request);
QueryOutcome outcome = new QueryOutcome(result);
setLastLowLevelResult(outcome);
return new QueryPage(client, spec, request, 0, outcome);
}
@Override
public Integer getMaxResultSize() {
return spec.getMaxResultSize();
}
protected void setLastLowLevelResult(QueryOutcome lowLevelResult) {
super.setLastLowLevelResult(lowLevelResult);
QueryResult result = lowLevelResult.getQueryResult();
accumulateStats(result.getConsumedCapacity(), result.getCount(),
result.getScannedCount());
}
}