io.druid.math.expr

Interface Expr

All Known Implementing Classes:

TimestampFloorExprMacro.TimestampFloorDynamicExpr, TimestampFloorExprMacro.TimestampFloorExpr

public interface Expr

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Expr.ObjectBinding
static interface	Expr.Visitor

Method Summary

Modifier and Type	Method and Description
ExprEval	eval(Expr.ObjectBinding bindings)
default Object	getLiteralValue() Returns the value of expr if expr is a literal, or throws an exception otherwise.
default boolean	isLiteral()
void	visit(Expr.Visitor visitor)

Method Detail

isLiteral

default boolean isLiteral()

getLiteralValue

@Nullable
default Object getLiteralValue()

Returns the value of expr if expr is a literal, or throws an exception otherwise.

Returns:

expr's literal value

Throws:

IllegalStateException - if expr is not a literal

eval

@Nonnull
ExprEval eval(Expr.ObjectBinding bindings)

visit

void visit(Expr.Visitor visitor)