io.druid.query.groupby

Class RowBasedColumnSelectorFactory

java.lang.Object

io.druid.query.groupby.RowBasedColumnSelectorFactory

All Implemented Interfaces:

ColumnSelectorFactory

public class RowBasedColumnSelectorFactory
extends Object
implements ColumnSelectorFactory

Method Summary

Modifier and Type	Method and Description
static RowBasedColumnSelectorFactory	create(com.google.common.base.Supplier<? extends Row> row, Map<String,ValueType> rowSignature)
static RowBasedColumnSelectorFactory	create(ThreadLocal<? extends Row> row, Map<String,ValueType> rowSignature)
ColumnCapabilities	getColumnCapabilities(String columnName) Returns capabilities of a particular column, if known.
ColumnValueSelector<?>	makeColumnValueSelector(String columnName) Returns ColumnValueSelector corresponding to the given column name, or NilColumnValueSelector if the column with such name is absent.
DimensionSelector	makeDimensionSelector(DimensionSpec dimensionSpec)

Methods inherited from class java.lang.Object

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

Method Detail

create

public static RowBasedColumnSelectorFactory create(com.google.common.base.Supplier<? extends Row> row,
                                                   @Nullable
                                                   Map<String,ValueType> rowSignature)

create

public static RowBasedColumnSelectorFactory create(ThreadLocal<? extends Row> row,
                                                   @Nullable
                                                   Map<String,ValueType> rowSignature)

makeDimensionSelector

public DimensionSelector makeDimensionSelector(DimensionSpec dimensionSpec)

Specified by:

makeDimensionSelector in interface ColumnSelectorFactory

makeColumnValueSelector

public ColumnValueSelector<?> makeColumnValueSelector(String columnName)

Description copied from interface: ColumnSelectorFactory

Returns ColumnValueSelector corresponding to the given column name, or NilColumnValueSelector if the column with such name is absent.

Specified by:

makeColumnValueSelector 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