water.udf

Class CFuncLoader

java.lang.Object

water.udf.CFuncLoader

Direct Known Subclasses:

JavaCFuncLoader

public abstract class CFuncLoader
extends java.lang.Object

Custom function loader interface. The custom function loader provide way of instantiating give function.

Constructor Summary

Constructors

Constructor and Description
CFuncLoader()

Method Summary

Methods

Modifier and Type	Method and Description
abstract java.lang.String	getLang() Supported language.
<F> F	load(java.lang.String jfuncName, java.lang.Class<? extends F> targetKlazz)
abstract <F> F	load(java.lang.String jfuncName, java.lang.Class<? extends F> targetKlazz, java.lang.ClassLoader classLoader) Instantiate demanded function.

Methods inherited from class java.lang.Object

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

Constructor Detail

CFuncLoader

public CFuncLoader()

Method Detail

getLang

public abstract java.lang.String getLang()

Supported language.

Returns:

language of function this provider can instantiate.

load

public <F> F load(java.lang.String jfuncName,
         java.lang.Class<? extends F> targetKlazz)

load

public abstract <F> F load(java.lang.String jfuncName,
         java.lang.Class<? extends F> targetKlazz,
         java.lang.ClassLoader classLoader)

Instantiate demanded function.

Type Parameters:

F - type of function

Parameters:

jfuncName - function name - this is target language specific!

targetKlazz - requested function Java interface

classLoader - classloader to use for function search

Returns:

return an object implementing given interface or null.