Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 21522:28cbfacd0518
Merge
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Thu, 28 May 2015 17:44:05 +0200 |
parents | 3286fb5fea4a |
children | 31fc2fce38f3 |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.impl; import com.oracle.truffle.api.TruffleLanguage; import com.oracle.truffle.api.vm.TruffleVM; import com.oracle.truffle.api.source.Source; import java.io.IOException; import java.lang.reflect.Constructor; import java.io.Reader; import java.io.Writer; import java.util.ServiceLoader; /** * Communication between TruffleVM and TruffleLanguage API/SPI. */ public abstract class Accessor { private static Accessor API; private static Accessor SPI; static { TruffleLanguage lng = new TruffleLanguage(null) { @Override protected Object eval(Source code) throws IOException { return null; } @Override protected Object findExportedSymbol(String globalName) { return null; } @Override protected Object getLanguageGlobal() { return null; } @Override protected boolean isObjectOfLanguage(Object object) { return false; } }; lng.hashCode(); } protected Accessor() { if (this.getClass().getSimpleName().endsWith("API")) { if (API != null) { throw new IllegalStateException(); } API = this; } else { if (SPI != null) { throw new IllegalStateException(); } SPI = this; } } protected TruffleLanguage attachEnv(TruffleVM vm, Constructor<?> langClazz, Writer stdOut, Writer stdErr, Reader stdIn) { return API.attachEnv(vm, langClazz, stdOut, stdErr, stdIn); } protected Object eval(TruffleLanguage l, Source s) throws IOException { return API.eval(l, s); } protected Object importSymbol(TruffleVM vm, TruffleLanguage queryingLang, String globalName) { return SPI.importSymbol(vm, queryingLang, globalName); } protected Object findExportedSymbol(TruffleLanguage l, String globalName) { return API.findExportedSymbol(l, globalName); } protected Object languageGlobal(TruffleLanguage l) { return API.languageGlobal(l); } protected Object invoke(Object obj, Object[] args) throws IOException { for (SymbolInvoker si : ServiceLoader.load(SymbolInvoker.class)) { return si.invoke(obj, args); } throw new IOException("No symbol invoker found!"); } }