com.espertech.esper.epl.join.plan
Class TableLookupPlan

java.lang.Object
  com.espertech.esper.epl.join.plan.TableLookupPlan

Direct Known Subclasses:

CompositeTableLookupPlan, FullTableScanLookupPlan, FullTableScanUniquePerKeyLookupPlan, IndexedTableLookupPlanMulti, IndexedTableLookupPlanSingle, InKeywordTableLookupPlanMultiIdx, InKeywordTableLookupPlanSingleIdx, SortedTableLookupPlan

public abstract class TableLookupPlan
extends java.lang.Object

Abstract specification on how to perform a table lookup.

Constructor Summary

protected

TableLookupPlan(int lookupStream, int indexedStream, TableLookupIndexReqKey[] indexNum) Ctor.

Method Summary

int	getIndexedStream() Returns indexed stream.
TableLookupIndexReqKey[]	getIndexNum() Returns index number to use for looking up in.
abstract TableLookupKeyDesc	getKeyDescriptor()
int	getLookupStream() Returns the lookup stream.
JoinExecTableLookupStrategy	makeStrategy(java.lang.String statementName, java.lang.String statementId, java.lang.annotation.Annotation[] accessedByStmtAnnotations, java.util.Map<TableLookupIndexReqKey,EventTable>[] indexesPerStream, EventType[] eventTypes, VirtualDWView[] viewExternals) Instantiates the lookup plan into a execution strategy for the lookup.
abstract JoinExecTableLookupStrategy	makeStrategyInternal(EventTable[] eventTable, EventType[] eventTypes)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

TableLookupPlan

protected TableLookupPlan(int lookupStream,
                          int indexedStream,
                          TableLookupIndexReqKey[] indexNum)

Ctor.

Parameters:

lookupStream - - stream number of stream that supplies event to be used to look up

indexedStream - - - stream number of stream that is being access via index/table

indexNum - - index to use for lookup

Method Detail

makeStrategyInternal

public abstract JoinExecTableLookupStrategy makeStrategyInternal(EventTable[] eventTable,
                                                                 EventType[] eventTypes)

getKeyDescriptor

public abstract TableLookupKeyDesc getKeyDescriptor()

makeStrategy

public final JoinExecTableLookupStrategy makeStrategy(java.lang.String statementName,
                                                      java.lang.String statementId,
                                                      java.lang.annotation.Annotation[] accessedByStmtAnnotations,
                                                      java.util.Map<TableLookupIndexReqKey,EventTable>[] indexesPerStream,
                                                      EventType[] eventTypes,
                                                      VirtualDWView[] viewExternals)

Instantiates the lookup plan into a execution strategy for the lookup.

Parameters:

indexesPerStream - - tables for each stream

eventTypes - - types of events in stream

Returns:

lookup strategy instance

getLookupStream

public int getLookupStream()

Returns the lookup stream.

Returns:

lookup stream

getIndexedStream

public int getIndexedStream()

Returns indexed stream.

Returns:

indexed stream

getIndexNum

public TableLookupIndexReqKey[] getIndexNum()

Returns index number to use for looking up in.

Returns:

index number

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object