Package io.deephaven.engine.table.impl

Class WouldMatchOperation

java.lang.Object

io.deephaven.engine.table.impl.WouldMatchOperation

All Implemented Interfaces:

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

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

A table operation similar to TableOperations.where(String...) except that instead of filtering the rows in the table, it appends new columns containing the result of the filter evaluation on each row of the table. It will re-evaluate cell values if any of the underlying filters are dynamic, and change.

Nested Class Summary

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

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

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

newSnapshotControl, snapshotNeeded

Method Details

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.

getMemoizedOperationKey

public MemoizedOperationKey getMemoizedOperationKey()

Specified by:

getMemoizedOperationKey in interface QueryTable.MemoizableOperation<QueryTable>

Returns:

the key that should be used to memoize off of