water.udf

Class JavaCFuncLoader

java.lang.Object

water.udf.CFuncLoader

water.udf.JavaCFuncLoader

public class JavaCFuncLoader
extends CFuncLoader

Custom function loader of java-based function. This loader is a tiny wrapper around ClassLoader.loadClass(String, boolean) call.

Constructor Summary

Constructors

Constructor and Description
JavaCFuncLoader()

Method Summary

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

Methods inherited from class water.udf.CFuncLoader

load

Methods inherited from class java.lang.Object

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

Constructor Detail

JavaCFuncLoader

public JavaCFuncLoader()

Method Detail

getLang

public java.lang.String getLang()

Description copied from class: CFuncLoader

Supported language.

Specified by:

getLang in class CFuncLoader

Returns:

language of function this provider can instantiate.

load

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

Description copied from class: CFuncLoader

Instantiate demanded function.

Specified by:

load in class CFuncLoader

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.