如何在耶拿创建定制的内置函数？ [英] How can I create customized builtins in Jena?

问题描述

我只是想知道如何为耶拿创建新的自定义内置函数。我知道为此，应该使用类BaseBuiltin和类BuiltinRegistry（但是如何？）。

I just wondering how I can create new custom builtins for Jena. I know that for this purpose it should be used both the class "BaseBuiltin" and the class "BuiltinRegistry" (but how ?).

我还发现了一个插件对于被称为SADL的Eclipse，但是我不知道如果为了这个目的可以使用。如果我可以...哪种方法更好，为什么？

I have also found out a plugin for Eclipse which is called "SADL" but I am not sure if I can use if for this purpose. If I can...which method is better and why ?

你们中有谁可以解释我应该采取哪种方式？

Could anyone of you explain me which way I should take ?

Cheers！

推荐答案

在后续的你的问题的后续行动，我提供了代码演示这个问题的答案。

In a follow-up to a later question of yours, I provide code demonstrating the answer to this question, as well.

我已经重复在这里为了需要快速参考的人的缘故。这个内置函数的名称为 example ，并将其大部分功能委托给 BaseBuiltin 根据写耶拿内置版和官方文档。感谢JT参考他以前的问题。

I've duplicated it here for the sake of people who need a quick reference. This builtin has the name example and delegates the majority of it's functionality to BaseBuiltin as per writing Jena builtin-ins and the Official Documentation. Thanks to JT for the reference to his previous question.

BuiltinRegistry.theRegistry.register( new BaseBuiltin() {
    @Override
    public String getName() {
        return "example";
    }
    @Override
    public void headAction( final Node[] args, final int length, final RuleContext context ) {
        System.out.println("Head Action: "+Arrays.toString(args));
    }
} );

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