InvokeFunctionTest.java

/*
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package com.sun.script.jruby.test;

import java.io.FileNotFoundException;
import java.io.FileReader;
import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;

/**
 * InvoleFunctionTest.java
 * @author Yoko Harada
 */
public class InvokeFunctionTest {

    public static void main(String[] args) throws ScriptException, NoSuchMethodException, FileNotFoundException {
        String basedir = System.getProperty("base.dir");
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = null;
        for (ScriptEngineFactory factory : manager.getEngineFactories()) {
            if ("ruby".equals(factory.getLanguageName())) {
                engine = factory.getScriptEngine();
                break;
            }
        }

        engine.eval("def hello(to) print 'Hello, ', to, '\n' end");
        Invocable invocable = (Invocable) engine;
        
        //Methods compiled("parsed" in ruby) previously can be invoked more than once.
        invocable.invokeFunction("hello", new Object[]{"Santa Claus"});
        invocable.invokeFunction("hello", new Object[]{"St. Valentine"});
        invocable.invokeFunction("hello", new Object[]{"St. Patrick"});
        
        //If a method to be invoked doesn't have any argument,
        //give an empty array of Object.
        engine.eval("def say() puts \"Don\'t drink too much!\" end");
        invocable.invokeFunction("say", new Object[]{});
        
        //give global variables to a method by context
        Object[] list = {"Scarecrow", "Pumpkin", "Witch"};
        engine.put("list", list);
        engine.eval(new FileReader(basedir+"/src/main/ruby/say2all.rb"));
        invocable.invokeFunction("say_to_all", new Object[]{});
        
        //give a global variable and an arugment to be used in the method
        engine.put("message", new String("trick or treat"));
        engine.eval(new FileReader(basedir+"/src/main/ruby/manytimes.rb"));
        invocable.invokeFunction("many_times", new Object[]{4});
    }
}