mirror of
https://github.com/ProjectSWGCore/Holocore.git
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74 lines
3.6 KiB
Java
74 lines
3.6 KiB
Java
/***********************************************************************************
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* Copyright (c) 2015 /// Project SWG /// www.projectswg.com *
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* *
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* ProjectSWG is the first NGE emulator for Star Wars Galaxies founded on *
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* July 7th, 2011 after SOE announced the official shutdown of Star Wars Galaxies. *
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* Our goal is to create an emulator which will provide a server for players to *
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* continue playing a game similar to the one they used to play. We are basing *
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* it on the final publish of the game prior to end-game events. *
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* *
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* This file is part of Holocore. *
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* *
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* -------------------------------------------------------------------------------- *
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* *
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* Holocore is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Affero General Public License as *
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* published by the Free Software Foundation, either version 3 of the *
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* License, or (at your option) any later version. *
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* *
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* Holocore is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Affero General Public License for more details. *
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* *
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* You should have received a copy of the GNU Affero General Public License *
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* along with Holocore. If not, see <http://www.gnu.org/licenses/>. *
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* *
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***********************************************************************************/
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package utilities;
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import java.io.FileNotFoundException;
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import java.io.FileReader;
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import javax.script.Invocable;
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import javax.script.ScriptEngine;
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import javax.script.ScriptEngineManager;
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public class Scripts {
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private static final String SCRIPTS = "scripts/";
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private static final String EXTENSION = ".js";
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private static final ScriptEngine ENGINE = new ScriptEngineManager().getEngineByName("nashorn");
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private static final Invocable INVOCABLE = (Invocable) ENGINE;
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static {
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ENGINE.put("intentFactory", new IntentFactory());
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}
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// Prevents instantiation.
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private Scripts() {}
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/**
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* @param script name of the script, relative to the scripts folder.
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* @param function name of the specific function within the script.
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* @param args to pass to the function.
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* @return whatever the function returns. If the function doesn't have a return statement, this method returns {@code null}.
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* If an exception occurs, {@code null} is returned.
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*/
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@SuppressWarnings("unchecked")
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public static <T> T invoke(String script, String function, Object... args) {
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try {
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ENGINE.eval(new FileReader(SCRIPTS + script + EXTENSION));
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return (T) INVOCABLE.invokeFunction(function, args);
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} catch (FileNotFoundException e) {
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// No need to print anything, this is a common error.
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// Returning null is all that's necessary
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return null;
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} catch (Throwable t) {
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t.printStackTrace();
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return null;
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}
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}
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}
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