Module datarush.library

Package com.pervasive.datarush.functions

Class DefaultFunctionInvoker

java.lang.Object

com.pervasive.datarush.functions.DefaultFunctionInvoker

All Implemented Interfaces:

FunctionInvoker

public class DefaultFunctionInvoker
extends Object
implements FunctionInvoker

A default function invoker, which passes arguments directly to the method using an ArgumentConverter.

Arguments may specify a converter using the FunctionArgument annotation. If no argument converter is specified for an argument, DefaultArgumentConverter is used.

If the number of arguments does not match the method's expected number of arguments, an IllegalArgumentException is thrown.

Constructor Summary

Constructors

Constructor	Description
DefaultFunctionInvoker()

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 Detail

DefaultFunctionInvoker

public DefaultFunctionInvoker()

Method Detail

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