138 lines
3.3 KiB
Java
138 lines
3.3 KiB
Java
/*
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* This file is part of the L2J Mobius project.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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 GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jmobius.gameserver.scripting.java;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.ServiceLoader;
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import javax.lang.model.SourceVersion;
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import javax.tools.JavaCompiler;
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import javax.tools.ToolProvider;
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import com.l2jmobius.gameserver.scripting.AbstractScriptingEngine;
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import com.l2jmobius.gameserver.scripting.IExecutionContext;
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/**
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* @author HorridoJoho
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*/
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public final class JavaScriptingEngine extends AbstractScriptingEngine
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{
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private volatile JavaCompiler _compiler;
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public JavaScriptingEngine()
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{
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super("L2J Java Engine", "1.0", "java");
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}
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private void determineCompilerOrThrow()
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{
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final String preferedCompiler = getProperty("preferedCompiler");
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LinkedList<JavaCompiler> allCompilers = null;
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JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
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if (compiler != null)
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{
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if ((preferedCompiler == null) || compiler.getClass().getName().equals(preferedCompiler))
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{
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_compiler = compiler;
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return;
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}
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allCompilers = new LinkedList<>();
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allCompilers.add(compiler);
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}
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final ServiceLoader<JavaCompiler> thirdPartyCompilers = ServiceLoader.load(JavaCompiler.class);
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Iterator<JavaCompiler> compilersIterator = thirdPartyCompilers.iterator();
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while (compilersIterator.hasNext())
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{
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compiler = compilersIterator.next();
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if ((preferedCompiler == null) || compiler.getClass().getName().equals(preferedCompiler))
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{
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_compiler = compiler;
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return;
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}
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if (allCompilers == null)
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{
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allCompilers = new LinkedList<>();
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}
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allCompilers.add(compilersIterator.next());
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}
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if (allCompilers != null)
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{
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compilersIterator = allCompilers.iterator();
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while (compilersIterator.hasNext())
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{
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compiler = compilersIterator.next();
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if ((preferedCompiler == null) || compiler.getClass().getName().equals(preferedCompiler))
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{
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break;
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}
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}
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}
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if (compiler == null)
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{
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throw new IllegalStateException("No javax.tools.JavaCompiler service installed!");
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}
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_compiler = compiler;
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}
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private void ensureCompilerOrThrow()
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{
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if (_compiler == null)
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{
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synchronized (this)
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{
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if (_compiler == null)
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{
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determineCompilerOrThrow();
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}
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}
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}
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}
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JavaCompiler getCompiler()
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{
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return _compiler;
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}
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@Override
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public IExecutionContext createExecutionContext()
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{
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ensureCompilerOrThrow();
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return new JavaExecutionContext(this);
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}
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@Override
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public String getLanguageName()
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{
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return "Java";
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}
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@Override
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public String getLanguageVersion()
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{
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ensureCompilerOrThrow();
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return Arrays.deepToString(_compiler.getSourceVersions().toArray(new SourceVersion[0])).replace("RELEASE_", "");
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}
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} |