/*
* 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.Map;
import com.amazonaws.services.dynamodbv2.AmazonDynamoDB;
import com.amazonaws.services.dynamodbv2.document.GetItemOutcome;
import com.amazonaws.services.dynamodbv2.document.Item;
import com.amazonaws.services.dynamodbv2.document.KeyAttribute;
import com.amazonaws.services.dynamodbv2.document.PrimaryKey;
import com.amazonaws.services.dynamodbv2.document.Table;
import com.amazonaws.services.dynamodbv2.document.api.GetItemApi;
import com.amazonaws.services.dynamodbv2.document.spec.GetItemSpec;
import com.amazonaws.services.dynamodbv2.model.GetItemRequest;
import com.amazonaws.services.dynamodbv2.model.GetItemResult;
/**
* The implementation for <code>GetItemApi</code>.
*/
public class GetItemImpl extends AbstractImpl implements GetItemApi {
public GetItemImpl(AmazonDynamoDB client, Table table) {
super(client, table);
}
@Override
public GetItemOutcome getItemOutcome(KeyAttribute... primaryKeyComponents) {
return doLoadItem(new GetItemSpec()
.withPrimaryKey(primaryKeyComponents));
}
@Override
public GetItemOutcome getItemOutcome(PrimaryKey primaryKey) {
return doLoadItem(new GetItemSpec()
.withPrimaryKey(primaryKey));
}
@Override
public GetItemOutcome getItemOutcome(PrimaryKey primaryKey,
String projectionExpression, Map<String, String> nameMap) {
return doLoadItem(new GetItemSpec()
.withPrimaryKey(primaryKey)
.withProjectionExpression(projectionExpression)
.withNameMap(nameMap));
}
@Override
public GetItemOutcome getItemOutcome(GetItemSpec spec) {
return doLoadItem(spec);
}
@Override
public Item getItem(GetItemSpec spec) {
return doLoadItem(spec).getItem();
}
private GetItemOutcome doLoadItem(GetItemSpec spec) {
String tableName = getTable().getTableName();
// Set up the key attributes
GetItemRequest req = spec.getRequest()
.withTableName(tableName)
.withKey(InternalUtils.toAttributeValueMap(spec.getKeyComponents()))
.withReturnConsumedCapacity(spec.getReturnConsumedCapacity())
.withAttributesToGet(spec.getAttributesToGet())
.withConsistentRead(spec.isConsistentRead())
.withProjectionExpression(spec.getProjectionExpression())
.withExpressionAttributeNames(spec.getNameMap());
GetItemResult result = getClient().getItem(req);
return new GetItemOutcome(result);
}
@Override
public Item getItem(KeyAttribute... primaryKey) {
return getItemOutcome(primaryKey).getItem();
}
@Override
public Item getItem(PrimaryKey primaryKey) {
return getItemOutcome(primaryKey).getItem();
}
@Override
public Item getItem(PrimaryKey primaryKey, String projectionExpression,
Map<String, String> nameMap) {
return getItemOutcome(primaryKey, projectionExpression, nameMap).getItem();
}
@Override
public GetItemOutcome getItemOutcome(String hashKeyName, Object hashKeyValue) {
return getItemOutcome(new KeyAttribute(hashKeyName, hashKeyValue));
}
@Override
public GetItemOutcome getItemOutcome(String hashKeyName, Object hashKeyValue,
String rangeKeyName, Object rangeKeyValue) {
return getItemOutcome(new KeyAttribute(hashKeyName, hashKeyValue),
new KeyAttribute(rangeKeyName, rangeKeyValue));
}
@Override
public Item getItem(String hashKeyName, Object hashKeyValue) {
return getItemOutcome(hashKeyName, hashKeyValue).getItem();
}
@Override
public Item getItem(String hashKeyName, Object hashKeyValue,
String rangeKeyName, Object rangeKeyValue) {
return getItemOutcome(hashKeyName, hashKeyValue, rangeKeyName, rangeKeyValue).getItem();
}
@Override
public GetItemOutcome getItemOutcome(String hashKeyName, Object hashKeyValue,
String projectionExpression, Map<String, String> nameMap) {
return getItemOutcome(new PrimaryKey(hashKeyName, hashKeyValue),
projectionExpression, nameMap);
}
@Override
public GetItemOutcome getItemOutcome(String hashKeyName, Object hashKeyValue,
String rangeKeyName, Object rangeKeyValue,
String projectionExpression, Map<String, String> nameMap) {
return getItemOutcome(
new PrimaryKey(hashKeyName, hashKeyValue, rangeKeyName, rangeKeyValue),
projectionExpression, nameMap);
}
@Override
public Item getItem(String hashKeyName, Object hashKeyValue,
String projectionExpression, Map<String, String> nameMap) {
return getItemOutcome(new PrimaryKey(hashKeyName, hashKeyValue),
projectionExpression, nameMap).getItem();
}
@Override
public Item getItem(String hashKeyName, Object hashKeyValue,
String rangeKeyName, Object rangeKeyValue,
String projectionExpression, Map<String, String> nameMap) {
return getItemOutcome(
new PrimaryKey(hashKeyName, hashKeyValue, rangeKeyName, rangeKeyValue),
projectionExpression, nameMap).getItem();
}
}