io.druid.segment.virtual

Class ExpressionSelectors

java.lang.Object

io.druid.segment.virtual.ExpressionSelectors

public class ExpressionSelectors
extends Object

Method Summary

Modifier and Type	Method and Description
static ColumnValueSelector	makeColumnValueSelector(ColumnSelectorFactory columnSelectorFactory, Expr expression) Makes a ColumnValueSelector whose getObject method returns an Object that is the value computed by an ExprEval.
static DimensionSelector	makeDimensionSelector(ColumnSelectorFactory columnSelectorFactory, Expr expression, ExtractionFn extractionFn)
static ColumnValueSelector<ExprEval>	makeExprEvalSelector(ColumnSelectorFactory columnSelectorFactory, Expr expression) Makes a ColumnValueSelector whose getObject method returns an ExprEval.

Methods inherited from class java.lang.Object

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

Method Detail

makeColumnValueSelector

public static ColumnValueSelector makeColumnValueSelector(ColumnSelectorFactory columnSelectorFactory,
                                                          Expr expression)

Makes a ColumnValueSelector whose getObject method returns an Object that is the value computed by an ExprEval.

See Also:

makeExprEvalSelector(ColumnSelectorFactory, Expr)

makeExprEvalSelector

public static ColumnValueSelector<ExprEval> makeExprEvalSelector(ColumnSelectorFactory columnSelectorFactory,
                                                                 Expr expression)

Makes a ColumnValueSelector whose getObject method returns an ExprEval.

See Also:

makeColumnValueSelector(ColumnSelectorFactory, Expr)

makeDimensionSelector

public static DimensionSelector makeDimensionSelector(ColumnSelectorFactory columnSelectorFactory,
                                                      Expr expression,
                                                      ExtractionFn extractionFn)