org.apache.druid.math.expr

Class Function.UnivariateFunction

java.lang.Object

org.apache.druid.math.expr.Function.UnivariateFunction

All Implemented Interfaces:

Function, NamedFunction

Direct Known Subclasses:

Function.ReverseFunc, Function.UnivariateMathFunction

Enclosing interface:

Function

public abstract static class Function.UnivariateFunction
extends Object
implements Function

Base class for a single variable input Function implementation

Nested Class Summary

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

Function.Abs, Function.Acos, Function.ArrayAddElementFunction, Function.ArrayAppendFunction, Function.ArrayConcatFunction, Function.ArrayConstructorFunction, Function.ArrayContainsFunction, Function.ArrayLengthFunction, Function.ArrayOffsetFunction, Function.ArrayOffsetOfFunction, Function.ArrayOrdinalFunction, Function.ArrayOrdinalOfFunction, Function.ArrayOverlapFunction, Function.ArrayPrependFunction, Function.ArrayScalarFunction, Function.ArraySetAddAllFunction, Function.ArraySetAddFunction, Function.ArraysFunction, Function.ArraySliceFunction, Function.ArraysMergeFunction, Function.ArrayToMultiValueStringFunction, Function.ArrayToStringFunction, Function.Asin, Function.Atan, Function.Atan2, Function.BitwiseAnd, Function.BitwiseComplement, Function.BitwiseConvertDoubleToLongBits, Function.BitwiseConvertLongBitsToDouble, Function.BitwiseOr, Function.BitwiseShiftLeft, Function.BitwiseShiftRight, Function.BitwiseXor, Function.BivariateBitwiseMathFunction, Function.BivariateFunction, Function.BivariateMathFunction, Function.CaseSearchedFunc, Function.CaseSimpleFunc, Function.CastFunc, Function.Cbrt, Function.Ceil, Function.ConcatFunc, Function.ConditionFunc, Function.CopySign, Function.Cos, Function.Cosh, Function.Cot, Function.Div, Function.DoubleBivariateMathFunction, Function.DoubleUnivariateMathFunction, Function.Exp, Function.Expm1, Function.Floor, Function.GetExponent, Function.GreatestFunc, Function.HumanReadableBinaryByteFormatFunc, Function.HumanReadableDecimalByteFormatFunc, Function.HumanReadableDecimalFormatFunc, Function.Hypot, Function.IsNotNullFunc, Function.IsNullFunc, Function.LeastFunc, Function.LeftFunc, Function.Log, Function.Log10, Function.Log1p, Function.LowerFunc, Function.LpadFunc, Function.Max, Function.Min, Function.MultiValueStringToArrayFunction, Function.NextAfter, Function.NextUp, Function.NvlFunc, Function.ParseLong, Function.Pi, Function.Pow, Function.ReduceFunction, Function.Remainder, Function.RepeatFunc, Function.ReplaceFunc, Function.ReverseFunc, Function.RightFunc, Function.Rint, Function.Round, Function.RpadFunc, Function.SafeDivide, Function.Scalb, Function.Signum, Function.Sin, Function.Sinh, Function.SizeFormatFunc, Function.Sqrt, Function.StringFormatFunc, Function.StringLongFunction, Function.StringToArrayFunction, Function.StrlenFunc, Function.StrposFunc, Function.SubMonthFunc, Function.SubstringFunc, Function.Tan, Function.Tanh, Function.TimestampFromEpochFunc, Function.ToDegrees, Function.ToRadians, Function.Ulp, Function.UnivariateFunction, Function.UnivariateMathFunction, Function.UnixTimestampFunc, Function.UpperFunc

Constructor Summary

Constructors

Constructor and Description
UnivariateFunction()

Method Summary

Modifier and Type	Method and Description
ExprEval	apply(List<Expr> args, Expr.ObjectBinding bindings) Evaluate the function, given a list of arguments and a set of bindings to provide values for IdentifierExpr.
protected abstract ExprEval	eval(ExprEval param)
void	validateArguments(List<Expr> args) Validate function arguments.

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.Function

asVectorProcessor, canVectorize, getArrayInputs, getOutputType, getScalarInputs, hasArrayInputs, hasArrayOutput

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

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

Constructor Detail

UnivariateFunction

public UnivariateFunction()

Method Detail

validateArguments

public void validateArguments(List<Expr> args)

Description copied from interface: Function

Validate function arguments. This method is called whenever a FunctionExpr is created, and should validate everything that is feasible up front. Note that input type information is typically unavailable at the time Expr are parsed, and so this method is incapable of performing complete validation.

Specified by:

validateArguments in interface Function

apply

public ExprEval apply(List<Expr> args,
                      Expr.ObjectBinding bindings)

Description copied from interface: Function

Evaluate the function, given a list of arguments and a set of bindings to provide values for IdentifierExpr.

Specified by:

apply in interface Function

eval

protected abstract ExprEval eval(ExprEval param)