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

Class SourceColumn

java.lang.Object

io.deephaven.engine.table.impl.select.SourceColumn

All Implemented Interfaces:

Selectable, SelectColumn

public class SourceColumn
extends Object
implements SelectColumn

Nested Class Summary

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

SelectColumn.ExpressionAdapter

Field Summary

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

ZERO_LENGTH_SELECT_COLUMN_ARRAY

Constructor Summary

Constructors

Constructor	Description
SourceColumn(String columnName)
SourceColumn(String sourceName, String destName)

Method Summary

Modifier and Type	Method	Description
SourceColumn	copy()	Create a copy of this SelectColumn.
boolean	equals(Object o)
static SourceColumn[]	from(Collection<? extends JoinAddition> joinAdditions)
List<String>	getColumnArrays()	Get a list of the names of column arrays used in this SelectColumn.
List<String>	getColumns()	Get a list of the names of columns used in this SelectColumn.
@NotNull ColumnSource<?>	getDataView()	Get a ColumnSource that can be used to access the data on demand.
@NotNull ColumnSource<?>	getLazyView()	Returns a lazily computed view of this column.
MatchPair	getMatchPair()	Get a MatchPair for this column, if applicable.
String	getName()	Get the name of the resultant column.
Class<?>	getReturnedComponentType()	Get the data component type stored in the resultant column.
Class<?>	getReturnedType()	Get the data type stored in the resultant column.
@NotNull String	getSourceName()
int	hashCode()
List<String>	initDef(@NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap)	Initialize any internal column definitions from the provided initial.
List<String>	initInputs(TrackingRowSet rowSet, Map<String,? extends ColumnSource<?>> columnsOfInterest)	Initialize the column from the provided set of underlying columns and row set.
boolean	isRetain()
boolean	isStateless()	Returns true if this column is stateless (i.e.
WritableColumnSource<?>	newDestInstance(long size)	Create a new WritableColumnSource.
WritableColumnSource<?>	newFlatDestInstance(long size)	Create a new immutable WritableColumnSource.
static SourceColumn	of(JoinAddition joinAddition)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

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

expression, initDef, newColumn, validateSafeForRefresh

Constructor Details

SourceColumn

public SourceColumn(String columnName)

SourceColumn

public SourceColumn(String sourceName,
 String destName)

Method Details

of

public static SourceColumn of(JoinAddition joinAddition)

from

public static SourceColumn[] from(Collection<? extends JoinAddition> joinAdditions)

initInputs

public List<String> initInputs(TrackingRowSet rowSet,
 Map<String,? extends ColumnSource<?>> columnsOfInterest)

Description copied from interface: SelectColumn

Initialize the column from the provided set of underlying columns and row set.

Specified by:

initInputs in interface SelectColumn

Parameters:

rowSet - the base row set

columnsOfInterest - the input columns

Returns:

a list of columns on which the result of this is dependent

initDef

public List<String> initDef(@NotNull
 @NotNull Map<String,ColumnDefinition<?>> columnDefinitionMap)

Description copied from interface: SelectColumn

Initialize any internal column definitions from the provided initial. Any formulae will be compiled immediately using the QueryCompiler in the current ExecutionContext.

Specified by:

initDef in interface SelectColumn

Parameters:

columnDefinitionMap - the starting set of column definitions; valid for this call only

Returns:

a list of columns on which the result of this is dependent

getReturnedType

public Class<?> getReturnedType()

Description copied from interface: SelectColumn

Get the data type stored in the resultant column.

Specified by:

getReturnedType in interface SelectColumn

Returns:

the type

getReturnedComponentType

public Class<?> getReturnedComponentType()

Description copied from interface: SelectColumn

Get the data component type stored in the resultant column.

Specified by:

getReturnedComponentType in interface SelectColumn

Returns:

the component type

getColumns

public List<String> getColumns()

Description copied from interface: SelectColumn

Get a list of the names of columns used in this SelectColumn. Behavior is undefined if none of the init* methods have been called yet.

Specified by:

getColumns in interface SelectColumn

Returns:

the columns used in this SelectColumn

getColumnArrays

public List<String> getColumnArrays()

Description copied from interface: SelectColumn

Get a list of the names of column arrays used in this SelectColumn. Behavior is undefined if none of the init* methods have been called yet.

Specified by:

getColumnArrays in interface SelectColumn

Returns:

the list of column arrays used

getDataView

@NotNull
public @NotNull ColumnSource<?> getDataView()

Description copied from interface: SelectColumn

Get a ColumnSource that can be used to access the data on demand.

Specified by:

getDataView in interface SelectColumn

Returns:

a ColumnSource

getLazyView

@NotNull
public @NotNull ColumnSource<?> getLazyView()

Description copied from interface: SelectColumn

Returns a lazily computed view of this column.

Specified by:

getLazyView in interface SelectColumn

Returns:

a lazily computed column source

getName

public String getName()

Description copied from interface: SelectColumn

Get the name of the resultant column.

Specified by:

getName in interface SelectColumn

Returns:

the name of the column

getSourceName

@NotNull
public @NotNull String getSourceName()

getMatchPair

public MatchPair getMatchPair()

Description copied from interface: SelectColumn

Get a MatchPair for this column, if applicable.

Specified by:

getMatchPair in interface SelectColumn

Returns:

newDestInstance

public WritableColumnSource<?> newDestInstance(long size)

Description copied from interface: SelectColumn

Create a new WritableColumnSource. The returned column source must be capable of handling updates.

Specified by:

newDestInstance in interface SelectColumn

Parameters:

size - A hint as to the number of rows that will be used

Returns:

a new WritableColumnSource

newFlatDestInstance

public WritableColumnSource<?> newFlatDestInstance(long size)

Description copied from interface: SelectColumn

Create a new immutable WritableColumnSource. The returned column source should be flat, and need not handle updates.

Specified by:

newFlatDestInstance in interface SelectColumn

Parameters:

size - A hint as to the number of rows that will be used

Returns:

a new WritableColumnSource

isRetain

public boolean isRetain()

Specified by:

isRetain in interface SelectColumn

Returns:

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

isStateless

public boolean isStateless()

Description copied from interface: SelectColumn

Returns true if this column is stateless (i.e. one row does not depend on the order of evaluation for another row).

Specified by:

isStateless in interface SelectColumn

copy

public SourceColumn copy()

Description copied from interface: SelectColumn

Create a copy of this SelectColumn.

Specified by:

copy in interface SelectColumn

Returns:

an independent copy of this SelectColumn.