VirtualizedColumnSelectorFactory (druid-processing 28.0.1 API)

java.lang.Object
- org.apache.druid.segment.virtual.VirtualizedColumnInspector
- - org.apache.druid.segment.virtual.VirtualizedColumnSelectorFactory

All Implemented Interfaces:

Expr.InputBindingInspector, ColumnInspector, ColumnSelectorFactory
```
public class VirtualizedColumnSelectorFactory
extends VirtualizedColumnInspector
implements ColumnSelectorFactory
```
ColumnSelectorFactory which can create selectors for both virtual and non-virtual columns

Field Summary
- Fields inherited from class org.apache.druid.segment.virtual.VirtualizedColumnInspector
  baseInspector, virtualColumns

Constructor Summary

Constructors
Constructor Description

VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory, VirtualColumns virtualColumns)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`RowIdSupplier`	`getRowIdSupplier()`	Returns a `RowIdSupplier` that allows callers to detect whether the selectors returned by this factory have moved or not.
`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 org.apache.druid.segment.virtual.VirtualizedColumnInspector
getColumnCapabilities

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.druid.segment.ColumnInspector
getColumnCapabilitiesWithDefault, getType

Methods inherited from interface org.apache.druid.segment.ColumnSelectorFactory
getColumnCapabilities

Methods inherited from interface org.apache.druid.math.expr.Expr.InputBindingInspector
areNumeric, areNumeric, areSameTypes, areSameTypes, areScalar, areScalar, canVectorize, canVectorize

- Constructor Detail
  - VirtualizedColumnSelectorFactory
```
public VirtualizedColumnSelectorFactory(ColumnSelectorFactory baseFactory,
                                        VirtualColumns virtualColumns)
```
- Method Detail
  - 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
  - getRowIdSupplier
```
@Nullable
public RowIdSupplier getRowIdSupplier()
```
    Description copied from interface: ColumnSelectorFactory
    
    Returns a RowIdSupplier that allows callers to detect whether the selectors returned by this factory have moved or not. Useful for selectors that wrap other selectors, such as virtual columns, as it allows them to cache their outputs.
    
    Specified by:
    
    getRowIdSupplier in interface ColumnSelectorFactory