Package io.deephaven.parquet.table.location

Class ParquetTableLocation

java.lang.Object

io.deephaven.engine.table.impl.locations.impl.SubscriptionAggregator<TableLocation.Listener>

io.deephaven.engine.table.impl.locations.impl.AbstractTableLocation

io.deephaven.parquet.table.location.ParquetTableLocation

All Implemented Interfaces:

LogOutputAppendable, DelegatingLivenessReferent, LivenessReferent, TableLocation, TableLocationState, NamedImplementation

public class ParquetTableLocation
extends AbstractTableLocation

Nested Class Summary

Nested classes/interfaces inherited from interface io.deephaven.engine.table.impl.locations.TableLocation

TableLocation.Listener

Field Summary

Fields inherited from class io.deephaven.engine.table.impl.locations.impl.SubscriptionAggregator

subscriptions

Fields inherited from interface io.deephaven.engine.table.impl.locations.TableLocationState

NULL_SIZE, NULL_TIME

Constructor Summary

Constructors

Constructor	Description
ParquetTableLocation(@NotNull TableKey tableKey, @NotNull ParquetTableLocationKey tableLocationKey, @NotNull ParquetInstructions readInstructions)

Method Summary

Modifier and Type	Method	Description
Map<String,ColumnTypeInfo>	getColumnTypes()
@NotNull List<String[]>	getDataIndexColumns()	Get a list of the columns by which this location is indexed
String	getImplementationName()	Get a name for the implementing class.
@NotNull List<SortColumn>	getSortedColumns()	Get an ordered list of columns this location is sorted by.
boolean	hasDataIndex(@NotNull String... columns)	Check if this TableLocation has a data index for the specified columns.
protected final void	initializeState()	No-op by default, can be overridden by subclasses to initialize state on first access.
@Nullable BasicDataIndex	loadDataIndex(@NotNull String... columns)	Load the data index from the location implementation.
protected @NotNull ColumnLocation	makeColumnLocation(@NotNull String columnName)
void	refresh()	Initialize or run state information.

Methods inherited from class io.deephaven.engine.table.impl.locations.impl.AbstractTableLocation

asLivenessReferent, clearColumnLocations, deliverInitialSnapshot, destroy, getColumnLocation, getDataIndex, getKey, getLastModifiedTimeMillis, getRowSet, getSize, getStateLock, getTableKey, handleUpdate, handleUpdate, handleUpdateInternal, handleUpdateInternal, toString

Methods inherited from class io.deephaven.engine.table.impl.locations.impl.SubscriptionAggregator

activateUnderlyingDataSource, activationFailed, activationSuccessful, checkHasSubscribers, deactivateUnderlyingDataSource, matchSubscriptionToken, postActivationHook, subscribe, supportsSubscriptions, unsubscribe

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.DelegatingLivenessReferent

dropReference, getWeakReference, tryRetainReference

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

getReferentDescription, retainReference

Methods inherited from interface io.deephaven.engine.table.impl.locations.TableLocation

append, subscribe, supportsSubscriptions, toGenericString, toStringDetailed, toStringHelper, unsubscribe

Methods inherited from interface io.deephaven.engine.table.impl.locations.TableLocationState

copyStateValuesTo

Constructor Details

ParquetTableLocation

public ParquetTableLocation(@NotNull
 @NotNull TableKey tableKey,
 @NotNull
 @NotNull ParquetTableLocationKey tableLocationKey,
 @NotNull
 @NotNull ParquetInstructions readInstructions)

Method Details

getImplementationName

public String getImplementationName()

Description copied from interface: NamedImplementation

Get a name for the implementing class. Useful for abstract classes that implement LogOutputAppendable or override toString.

The default implementation is correct, but not suitable for high-frequency usage.

Returns:

A name for the implementing class

refresh

public void refresh()

Description copied from interface: TableLocation

Initialize or run state information.

getColumnTypes

public Map<String,ColumnTypeInfo> getColumnTypes()

getSortedColumns

@NotNull
public @NotNull List<SortColumn> getSortedColumns()

Description copied from interface: TableLocation

Get an ordered list of columns this location is sorted by.

Returns:

A non-null ordered list of SortColumns

initializeState

protected final void initializeState()

Description copied from class: AbstractTableLocation

No-op by default, can be overridden by subclasses to initialize state on first access.

The expectation for static locations that override this is to call AbstractTableLocation.handleUpdateInternal(RowSet, long) instead of AbstractTableLocation.handleUpdate(RowSet, long), and AbstractTableLocation.handleUpdateInternal(TableLocationState) instead of AbstractTableLocation.handleUpdate(TableLocationState) from inside AbstractTableLocation.initializeState(). Otherwise, the initialization logic will recurse infinitely.

Overrides:

initializeState in class AbstractTableLocation

makeColumnLocation

@NotNull
protected @NotNull ColumnLocation makeColumnLocation(@NotNull
 @NotNull String columnName)

Specified by:

makeColumnLocation in class AbstractTableLocation

getDataIndexColumns

@NotNull
public @NotNull List<String[]> getDataIndexColumns()

Description copied from interface: TableLocation

Get a list of the columns by which this location is indexed

Returns:

A non-null list of String[] arrays containing the key column names for each existing index

hasDataIndex

public boolean hasDataIndex(@NotNull
 @NotNull String... columns)

Description copied from interface: TableLocation

Check if this TableLocation has a data index for the specified columns.

Parameters:

columns - The set of columns to check for

Returns:

Whether the TableLocation has an index for the specified columns

loadDataIndex

@Nullable
public @Nullable BasicDataIndex loadDataIndex(@NotNull
 @NotNull String... columns)

Description copied from class: AbstractTableLocation

Load the data index from the location implementation. Implementations of this method should not perform any result caching.

Specified by:

loadDataIndex in class AbstractTableLocation

Parameters:

columns - The columns to load an index for

Returns:

The data index, or null if none exists