io.druid.segment.virtual

Class VirtualizedColumnSelectorFactory

java.lang.Object

io.druid.segment.virtual.VirtualizedColumnSelectorFactory

All Implemented Interfaces:

ColumnSelectorFactory

public class VirtualizedColumnSelectorFactory
extends Object
implements ColumnSelectorFactory

Constructor Summary

Constructors

Constructor and Description
VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory, VirtualColumns virtualColumns)

Method Summary

Modifier and Type	Method and Description
ColumnCapabilities	getColumnCapabilities(String columnName) Returns capabilities of a particular column, if known.
DimensionSelector	makeDimensionSelector(DimensionSpec dimensionSpec)
FloatColumnSelector	makeFloatColumnSelector(String columnName)
LongColumnSelector	makeLongColumnSelector(String columnName)
ObjectColumnSelector	makeObjectColumnSelector(String columnName)

Methods inherited from class java.lang.Object

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

Constructor Detail

VirtualizedColumnSelectorFactory

public VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory,
                                        VirtualColumns virtualColumns)

Method Detail

makeDimensionSelector

public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec)

Specified by:

makeDimensionSelector in interface ColumnSelectorFactory

makeFloatColumnSelector

public FloatColumnSelector makeFloatColumnSelector(String columnName)

Specified by:

makeFloatColumnSelector in interface ColumnSelectorFactory

makeLongColumnSelector

public LongColumnSelector makeLongColumnSelector(String columnName)

Specified by:

makeLongColumnSelector in interface ColumnSelectorFactory

makeObjectColumnSelector

@Nullable
public ObjectColumnSelector makeObjectColumnSelector(String columnName)

Specified by:

makeObjectColumnSelector in interface ColumnSelectorFactory

getColumnCapabilities

@Nullable
public ColumnCapabilities getColumnCapabilities(String columnName)

Description copied from interface: ColumnSelectorFactory

Returns capabilities of a particular column, if known. May be null if the column doesn't exist, or if the column does exist but the capabilities are unknown. The latter is possible with dynamically discovered columns.

Specified by:

getColumnCapabilities in interface ColumnSelectorFactory

Parameters:

columnName - column name

Returns:

capabilities, or null