Package org.apache.druid.math.expr

Class ApplyFunction.BaseMapFunction

java.lang.Object

org.apache.druid.math.expr.ApplyFunction.BaseMapFunction

All Implemented Interfaces:

ApplyFunction, NamedFunction

Direct Known Subclasses:

ApplyFunction.CartesianMapFunction, ApplyFunction.MapFunction

Enclosing interface:

ApplyFunction

public abstract static class ApplyFunction.BaseMapFunction
extends Object
implements ApplyFunction

Base class for "map" functions, which are a class of ApplyFunction which take a lambda function that is mapped to the values of an ApplyFunction.IndexableMapLambdaObjectBinding which is created from the outer Expr.ObjectBinding and the values of the array Expr argument(s)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.math.expr.ApplyFunction

ApplyFunction.AllMatchFunction, ApplyFunction.AnyMatchFunction, ApplyFunction.BaseFoldFunction, ApplyFunction.BaseMapFunction, ApplyFunction.CartesianFoldFunction, ApplyFunction.CartesianFoldLambdaBinding, ApplyFunction.CartesianMapFunction, ApplyFunction.CartesianMapLambdaBinding, ApplyFunction.FilterFunction, ApplyFunction.FoldFunction, ApplyFunction.FoldLambdaBinding, ApplyFunction.IndexableFoldLambdaBinding, ApplyFunction.IndexableMapLambdaObjectBinding, ApplyFunction.LambdaInputBindingInspector, ApplyFunction.MapFunction, ApplyFunction.MapLambdaBinding, ApplyFunction.MatchFunction, ApplyFunction.SettableLambdaBinding

Constructor Summary

Constructors

Constructor	Description
BaseMapFunction()

Method Summary

Modifier and Type	Method	Description
ExpressionType	getOutputType(Expr.InputBindingInspector inspector, org.apache.druid.math.expr.LambdaExpr expr, List<Expr> args)	Compute the output type of this function for a given lambda and the argument expressions which will be applied as its inputs.
boolean	hasArrayOutput(org.apache.druid.math.expr.LambdaExpr lambdaExpr)	Returns true if apply function produces an array output.

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.math.expr.ApplyFunction

apply, asVectorProcessor, canVectorize, getArrayInputs, validateArguments

Methods inherited from interface org.apache.druid.math.expr.NamedFunction

name, processingFailed, validationFailed, validationFailed, validationHelperCheckAnyOfArgumentCount, validationHelperCheckArgIsLiteral, validationHelperCheckArgumentCount, validationHelperCheckArgumentCount, validationHelperCheckArgumentRange, validationHelperCheckLambaArgumentCount, validationHelperCheckMinArgumentCount, validationHelperCheckMinArgumentCount

Constructor Detail

BaseMapFunction

public BaseMapFunction()

Method Detail

hasArrayOutput

public boolean hasArrayOutput(org.apache.druid.math.expr.LambdaExpr lambdaExpr)

Description copied from interface: ApplyFunction

Returns true if apply function produces an array output. All ApplyFunction implementations are expected to exclusively produce either scalar or array values.

Specified by:

hasArrayOutput in interface ApplyFunction

getOutputType

@Nullable
public ExpressionType getOutputType(Expr.InputBindingInspector inspector,
                                    org.apache.druid.math.expr.LambdaExpr expr,
                                    List<Expr> args)

Description copied from interface: ApplyFunction

Compute the output type of this function for a given lambda and the argument expressions which will be applied as its inputs.

Specified by:

getOutputType in interface ApplyFunction

See Also:

Expr.getOutputType(org.apache.druid.math.expr.Expr.InputBindingInspector)