Module datarush.library

Package com.pervasive.datarush.functions

Class WavgFunctionInvoker

java.lang.Object

com.pervasive.datarush.functions.WavgFunctionInvoker

All Implemented Interfaces:

FunctionInvoker

public class WavgFunctionInvoker
extends Object
implements FunctionInvoker

A specialized function invoker for wavg. It takes an even number of arguments; each pair of arguments consists of any ScalarValuedFunction (the value to be averaged,) followed by a numeric constant (the weight of that value.) The ScalarValuedFunctions are arranged into a list, and the numeric constants are arranged into an array of floats. These two resulting data structures are passed to the method in that order.

Constructor Summary

Constructors

Constructor	Description
WavgFunctionInvoker()

Method Summary

Modifier and Type	Method	Description
Object	invoke(Method m, ScalarValuedFunction[] args)	Invokes a method to return a ScalarValuedFunction, using the given arguments.

Methods inherited from class java.lang.Object

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

Constructor Details

WavgFunctionInvoker

public WavgFunctionInvoker()

Method Details

invoke

public Object invoke(Method m,
 ScalarValuedFunction[] args)
              throws IllegalArgumentException,
IllegalAccessException,
InvocationTargetException

Description copied from interface: FunctionInvoker

Invokes a method to return a ScalarValuedFunction, using the given arguments.

Specified by:

invoke in interface FunctionInvoker

Parameters:

m - The method to invoke.

args - The ScalarValuedFunction arguments from the call to the FunctionRegistry.

Returns:

The ScalarValuedFunction or Aggregation returned by invoking the method.

Throws:

IllegalArgumentException

IllegalAccessException

InvocationTargetException