Package io.deephaven.engine.table.impl.select

Class UnsortedClockFilter

java.lang.Object

io.deephaven.util.referencecounting.ReferenceCounted

io.deephaven.engine.liveness.ReferenceCountedLivenessReferent

io.deephaven.engine.liveness.ReferenceCountedLivenessNode

io.deephaven.engine.liveness.LivenessArtifact

io.deephaven.engine.table.impl.select.WhereFilterLivenessArtifactImpl

io.deephaven.engine.table.impl.select.ClockFilter

io.deephaven.engine.table.impl.select.UnsortedClockFilter

All Implemented Interfaces:

ConcurrencyControl<Filter>, Expression, Filter, LogOutputAppendable, LivenessManager, LivenessNode, LivenessReferent, ReindexingFilter, WhereFilter, NotificationQueue.Dependency, Serializable, Runnable

public class UnsortedClockFilter
extends ClockFilter

This will filter a table on an Instant column for all rows greater than "now" according to a supplied clock. It does not require any pre-sorting of the input table, instead preserving relative order in the initial output and each subsequent run. Relative to SortedClockFilter, this implementation may require less overall storage and do less overall work for tables with relatively few monotonically nondecreasing ranges (that is, m (number of ranges) <<< n (size in rows)), but it will do more work on run().

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class io.deephaven.engine.table.impl.select.ClockFilter

ClockFilter.Range

Nested classes/interfaces inherited from interface io.deephaven.engine.table.impl.select.WhereFilter

WhereFilter.PreviousFilteringNotSupported, WhereFilter.RecomputeListener, WhereFilter.Visitor<T>

Field Summary

Fields inherited from class io.deephaven.engine.table.impl.select.ClockFilter

clock, columnName

Fields inherited from class io.deephaven.engine.table.impl.select.WhereFilterLivenessArtifactImpl

updateGraph

Fields inherited from interface io.deephaven.engine.table.impl.select.WhereFilter

ZERO_LENGTH_WHERE_FILTER_ARRAY

Constructor Summary

Constructors

Constructor	Description
UnsortedClockFilter(@NotNull String columnName, @NotNull Clock clock, boolean refreshing)

Method Summary

Modifier and Type	Method	Description
UnsortedClockFilter	copy()	Create a copy of this WhereFilter.
String[]	getSortColumns()	Get the columns on which the input table should be sorted before filtering.
protected @Nullable WritableRowSet	initializeAndGetInitialIndex(@NotNull RowSet selection, @NotNull RowSet fullSet, @NotNull Table table)
boolean	permitParallelization()
boolean	requiresSorting()
void	sortingDone()	Advise this filter that sorting has been performed.
protected @Nullable WritableRowSet	updateAndGetAddedIndex()

Methods inherited from class io.deephaven.engine.table.impl.select.ClockFilter

destroy, filter, getColumnArrays, getColumns, getUpdateGraph, init, isRefreshing, isSimpleFilter, run, satisfied, setRecomputeListener

Methods inherited from class io.deephaven.engine.table.impl.select.WhereFilterLivenessArtifactImpl

isAutomatedFilter, setAutomatedFilter

Methods inherited from class io.deephaven.engine.liveness.LivenessArtifact

manageWithCurrentScope

Methods inherited from class io.deephaven.engine.liveness.ReferenceCountedLivenessNode

getWeakReference, initializeTransientFieldsForLiveness, onReferenceCountAtZero, tryManage, tryUnmanage, tryUnmanage

Methods inherited from class io.deephaven.engine.liveness.ReferenceCountedLivenessReferent

dropReference, tryRetainReference

Methods inherited from class io.deephaven.util.referencecounting.ReferenceCounted

append, decrementReferenceCount, forceReferenceCountToZero, getReferenceCountDebug, incrementReferenceCount, resetReferenceCount, toString, tryDecrementReferenceCount, tryIncrementReferenceCount

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.deephaven.engine.liveness.LivenessManager

manage, unmanage, unmanage

Methods inherited from interface io.deephaven.engine.liveness.LivenessReferent

dropReference, getReferentDescription, retainReference, tryRetainReference

Methods inherited from interface io.deephaven.base.log.LogOutputAppendable

append

Methods inherited from interface io.deephaven.engine.updategraph.NotificationQueue.Dependency

getUpdateGraph

Methods inherited from interface io.deephaven.engine.table.impl.select.WhereFilter

beginOperation, canMemoize, filter, filterInverse, hasVirtualRowVariables, init, invert, isAutomatedFilter, setAutomatedFilter, validateSafeForRefresh, walk, walk, walk, withDeclaredBarriers, withRespectedBarriers, withSerial

Constructor Details

UnsortedClockFilter

public UnsortedClockFilter(@NotNull
 @NotNull String columnName,
 @NotNull
 @NotNull Clock clock,
 boolean refreshing)

Method Details

requiresSorting

public boolean requiresSorting()

Returns:

True iff getSortColumns will return a non-null, non-empty array of column names to sort on.

getSortColumns

public String[] getSortColumns()

Description copied from interface: ReindexingFilter

Get the columns on which the input table should be sorted before filtering.

Returns:

Columns to sort on, or null if there are no such columns

sortingDone

public void sortingDone()

Description copied from interface: ReindexingFilter

Advise this filter that sorting has been performed. requiresSorting must return false hereafter.

copy

public UnsortedClockFilter copy()

Description copied from interface: WhereFilter

Create a copy of this WhereFilter.

Returns:

an independent copy of this WhereFilter.

initializeAndGetInitialIndex

@Nullable
protected @Nullable WritableRowSet initializeAndGetInitialIndex(@NotNull
 @NotNull RowSet selection,
 @NotNull
 @NotNull RowSet fullSet,
 @NotNull
 @NotNull Table table)

Specified by:

initializeAndGetInitialIndex in class ClockFilter

updateAndGetAddedIndex

@Nullable
protected @Nullable WritableRowSet updateAndGetAddedIndex()

Specified by:

updateAndGetAddedIndex in class ClockFilter

permitParallelization

public boolean permitParallelization()

Returns:

if this filter can be applied in parallel