Package com.gigaspaces.query.aggregators

Class OrderByAggregator<T>

java.lang.Object

com.gigaspaces.query.aggregators.SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

com.gigaspaces.query.aggregators.OrderByAggregator<T>

All Implemented Interfaces:

SmartExternalizable, Externalizable, Serializable, Cloneable

public class OrderByAggregator<T>
extends SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>
implements SmartExternalizable

Aggregator for order by operation. Supports several paths,asc/desc and limited results

Since:

10.1

Author:

anna

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	OrderByAggregator.OrderByElementComparator
static class	OrderByAggregator.OrderByScanResult

Constructor Summary

Constructors

Constructor	Description
OrderByAggregator()
OrderByAggregator(int limit)
OrderByAggregator(int limit, int offset)

Method Summary

Modifier and Type	Method	Description
void	aggregate(SpaceEntriesAggregatorContext context)
void	aggregateIntermediateResult(OrderByAggregator.OrderByScanResult partitionResult)
String	getDefaultAlias()
Collection<T>	getFinalResult()
OrderByAggregator.OrderByScanResult	getIntermediateResult()
List<OrderByPath>	getOrderByPaths()
String	getSQLQuery(String typeName)
void	handleIntermediateResultOfDbStorage(ResultSet resultSet, ITypeDesc typeDesc)
void	handleIntermediateResultOfMemoryStorage(TypeDataIndex index, TypeData entryType)
boolean	isIndexUsed(Map<String,SpaceIndex> indexes, boolean isMemoryScan)
OrderByAggregator	orderBy(String path)
OrderByAggregator	orderBy(String path, OrderBy orderBy)
OrderByAggregator	orderBy(String path, OrderBy orderBy, boolean nullsLast)
OrderByAggregator	projection(String... path)
void	readExternal(ObjectInput in)
void	setAggregatorContext(SpaceEntriesAggregatorContext context)
void	setProjectionPaths(String[] paths)
boolean	skipFullScanSupported(Map<String,SpaceIndex> indexes, boolean isMemoryScan)
void	writeExternal(ObjectOutput out)

Methods inherited from class com.gigaspaces.query.aggregators.SpaceEntriesAggregator

as, clone, getAlias, setRawEntryConverter, skipProcessedUidStore, toObject

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.gigaspaces.serialization.SmartExternalizable

enabledSmartExternalizableWithReference

Constructor Details

OrderByAggregator

public OrderByAggregator()

OrderByAggregator

public OrderByAggregator(int limit)

OrderByAggregator

public OrderByAggregator(int limit,
 int offset)

Method Details

orderBy

public OrderByAggregator orderBy(String path,
 OrderBy orderBy)

orderBy

public OrderByAggregator orderBy(String path)

orderBy

public OrderByAggregator orderBy(String path,
 OrderBy orderBy,
 boolean nullsLast)

projection

public OrderByAggregator projection(String... path)

skipFullScanSupported

public boolean skipFullScanSupported(Map<String,SpaceIndex> indexes,
 boolean isMemoryScan)

Overrides:

skipFullScanSupported in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

isIndexUsed

public boolean isIndexUsed(Map<String,SpaceIndex> indexes,
 boolean isMemoryScan)

Overrides:

isIndexUsed in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

getOrderByPaths

public List<OrderByPath> getOrderByPaths()

getDefaultAlias

public String getDefaultAlias()

Specified by:

getDefaultAlias in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

setProjectionPaths

public void setProjectionPaths(String[] paths)

handleIntermediateResultOfMemoryStorage

public void handleIntermediateResultOfMemoryStorage(TypeDataIndex index,
 TypeData entryType)

Overrides:

handleIntermediateResultOfMemoryStorage in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

handleIntermediateResultOfDbStorage

public void handleIntermediateResultOfDbStorage(ResultSet resultSet,
 ITypeDesc typeDesc)
                                         throws SQLException

Overrides:

handleIntermediateResultOfDbStorage in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

Throws:

SQLException

getSQLQuery

public String getSQLQuery(String typeName)

Overrides:

getSQLQuery in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

aggregate

public void aggregate(SpaceEntriesAggregatorContext context)

Specified by:

aggregate in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

aggregateIntermediateResult

public void aggregateIntermediateResult(OrderByAggregator.OrderByScanResult partitionResult)

Specified by:

aggregateIntermediateResult in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

getIntermediateResult

public OrderByAggregator.OrderByScanResult getIntermediateResult()

Specified by:

getIntermediateResult in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

getFinalResult

public Collection<T> getFinalResult()

Overrides:

getFinalResult in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

setAggregatorContext

public void setAggregatorContext(SpaceEntriesAggregatorContext context)

Overrides:

setAggregatorContext in class SpaceEntriesAggregator<OrderByAggregator.OrderByScanResult>

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException