Package io.deephaven.engine.table.impl

Class UngroupOperation

java.lang.Object

io.deephaven.engine.table.impl.UngroupOperation

All Implemented Interfaces:

QueryTable.MemoizableOperation<QueryTable>, QueryTable.Operation<QueryTable>

public class UngroupOperation
extends Object
implements QueryTable.MemoizableOperation<QueryTable>

The ungroup operation implements TableOperations.ungroup().

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.engine.table.impl.QueryTable.Operation

QueryTable.Operation.Result<T extends DynamicNode & NotificationStepReceiver>

Constructor Summary

Constructors

Constructor	Description
UngroupOperation(QueryTable parent, boolean nullFill, String[] columnsToUngroupBy)

Method Summary

Modifier and Type	Method	Description
String	getDescription()
String	getLogPrefix()
MemoizedOperationKey	getMemoizedOperationKey()
QueryTable.Operation.Result<QueryTable>	initialize(boolean usePrev, long beforeClock)	Initialize this operation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.deephaven.engine.table.impl.QueryTable.Operation

beginOperation, newSnapshotControl, snapshotNeeded

Constructor Details

UngroupOperation

public UngroupOperation(QueryTable parent,
 boolean nullFill,
 String[] columnsToUngroupBy)

Method Details

getMemoizedOperationKey

public MemoizedOperationKey getMemoizedOperationKey()

Specified by:

getMemoizedOperationKey in interface QueryTable.MemoizableOperation<QueryTable>

Returns:

the key that should be used to memoize off of

getDescription

public String getDescription()

Specified by:

getDescription in interface QueryTable.Operation<QueryTable>

Returns:

the description of this operation

getLogPrefix

public String getLogPrefix()

Specified by:

getLogPrefix in interface QueryTable.Operation<QueryTable>

Returns:

the log prefix of this operation

initialize

public QueryTable.Operation.Result<QueryTable> initialize(boolean usePrev,
 long beforeClock)

Description copied from interface: QueryTable.Operation

Initialize this operation.

Specified by:

initialize in interface QueryTable.Operation<QueryTable>

Parameters:

usePrev - data from the previous cycle should be used (otherwise use this cycle)

beforeClock - the clock value that we captured before the function began; the function can use this value to bail out early if it notices something has gone wrong.

Returns:

the result table / listener if successful, null if it should be retried.