Package org.apache.calcite.schema.impl

Class ReflectiveFunctionBase

java.lang.Object

org.apache.calcite.schema.impl.ReflectiveFunctionBase

All Implemented Interfaces:

Function

Direct Known Subclasses:

ScalarFunctionImpl, TableFunctionImpl, TableMacroImpl

public abstract class ReflectiveFunctionBase
extends Object
implements Function

Implementation of a function that is based on a method. This class mainly solves conversion of method parameter types to List<FunctionParameter> form.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReflectiveFunctionBase.ParameterListBuilder	Helps build lists of FunctionParameter.

Field Summary

Fields

Modifier and Type	Field	Description
final Method	method	Method that implements the function.
final List<FunctionParameter>	parameters	Types of parameter for the function call.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ReflectiveFunctionBase(Method method)	Creates a ReflectiveFunctionBase.

Method Summary

Modifier and Type	Method	Description
static ReflectiveFunctionBase.ParameterListBuilder	builder()	Creates a ParameterListBuilder.
List<FunctionParameter>	getParameters()	Returns the parameters of this function.

Methods inherited from class java.lang.Object

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

Field Details

method

public final Method method

Method that implements the function.

parameters

public final List<FunctionParameter> parameters

Types of parameter for the function call.

Constructor Details

ReflectiveFunctionBase

protected ReflectiveFunctionBase(Method method)

Creates a ReflectiveFunctionBase.

Parameters:

method - Method that is used to get type information from

Method Details

getParameters

public List<FunctionParameter> getParameters()

Returns the parameters of this function.

Specified by:

getParameters in interface Function

Returns:

Parameters; never null

builder

public static ReflectiveFunctionBase.ParameterListBuilder builder()

Creates a ParameterListBuilder.