com.mckoi.database

Interface FunctionLookup

All Known Implementing Classes:

FunctionFactory

public interface FunctionLookup

An interface that resolves and generates a Function objects given a FunctionDef object.

Author:

Tobias Downer

Method Summary

Modifier and Type	Method and Description
Function	generateFunction(FunctionDef function_def) Generate the Function given a FunctionDef object.
boolean	isAggregate(FunctionDef function_def) Returns true if the function defined by FunctionDef is an aggregate function, or false otherwise.

Method Detail

generateFunction

Function generateFunction(FunctionDef function_def)

Generate the Function given a FunctionDef object. Returns null if the FunctionDef can not be resolved to a valid function object. If the specification of the function is invalid for some reason (the number or type of the parameters is incorrect) then a StatementException is thrown.

isAggregate

boolean isAggregate(FunctionDef function_def)

Returns true if the function defined by FunctionDef is an aggregate function, or false otherwise.