Mercurial > hg > truffle
view truffle/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/LanguageRegistrationProcessor.java @ 22066:78c3d3d8d86e
Clearly separating the TruffleLanguage definition from context used during its execution. TruffleLanguage now has to have public static field INSTANCE and override createContext method.
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
---|---|
date | Thu, 06 Aug 2015 08:31:49 +0200 |
parents | f878f9778548 |
children | dc83cc1f94f2 |
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/* * Copyright (c) 2012, 2015, 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. * * 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.dsl.processor; import java.io.*; import java.util.*; import javax.annotation.processing.*; import javax.lang.model.*; import javax.lang.model.element.*; import javax.lang.model.type.*; import javax.tools.Diagnostic.Kind; import javax.tools.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.TruffleLanguage.Registration; @SupportedAnnotationTypes("com.oracle.truffle.api.TruffleLanguage.Registration") public final class LanguageRegistrationProcessor extends AbstractProcessor { private final List<TypeElement> registrations = new ArrayList<>(); @Override public SourceVersion getSupportedSourceVersion() { return SourceVersion.latest(); } private void generateFile(List<TypeElement> languages) { String filename = "META-INF/truffle/language"; Properties p = new Properties(); int cnt = 0; for (TypeElement l : languages) { Registration annotation = l.getAnnotation(Registration.class); if (annotation == null) { continue; } String prefix = "language" + ++cnt + "."; String className = processingEnv.getElementUtils().getBinaryName(l).toString(); p.setProperty(prefix + "name", annotation.name()); p.setProperty(prefix + "version", annotation.version()); p.setProperty(prefix + "className", className); String[] mimes = annotation.mimeType(); for (int i = 0; i < mimes.length; i++) { p.setProperty(prefix + "mimeType." + i, mimes[i]); } } if (cnt > 0) { try { FileObject file = processingEnv.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", filename, languages.toArray(new Element[0])); try (OutputStream os = file.openOutputStream()) { p.store(os, "Generated by " + LanguageRegistrationProcessor.class.getName()); } } catch (IOException e) { processingEnv.getMessager().printMessage(Kind.ERROR, e.getMessage(), languages.get(0)); } } } @Override public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { if (roundEnv.processingOver()) { generateFile(registrations); registrations.clear(); return true; } for (Element e : roundEnv.getElementsAnnotatedWith(Registration.class)) { Registration annotation = e.getAnnotation(Registration.class); if (annotation != null && e.getKind() == ElementKind.CLASS) { if (!e.getModifiers().contains(Modifier.PUBLIC)) { emitError("Registered language class must be public", e); continue; } if (e.getEnclosingElement().getKind() != ElementKind.PACKAGE && !e.getModifiers().contains(Modifier.STATIC)) { emitError("Registered language inner-class must be static", e); continue; } TypeMirror truffleLang = processingEnv.getTypeUtils().erasure(processingEnv.getElementUtils().getTypeElement(TruffleLanguage.class.getName()).asType()); if (!processingEnv.getTypeUtils().isAssignable(e.asType(), truffleLang)) { emitError("Registered language class must subclass TruffleLanguage", e); continue; } boolean found = false; for (Element mem : e.getEnclosedElements()) { if (!mem.getModifiers().contains(Modifier.PUBLIC)) { continue; } if (mem.getKind() != ElementKind.FIELD) { continue; } if (!mem.getModifiers().contains(Modifier.FINAL)) { continue; } if (!"INSTANCE".equals(mem.getSimpleName().toString())) { continue; } if (processingEnv.getTypeUtils().isAssignable(mem.asType(), truffleLang)) { found = true; break; } } if (!found) { emitError("Language class must have public static final singleton field called INSTANCE", e); continue; } assertNoErrorExpected(e); registrations.add((TypeElement) e); } } return true; } void assertNoErrorExpected(Element e) { ExpectError.assertNoErrorExpected(processingEnv, e); } void emitError(String msg, Element e) { if (ExpectError.isExpectedError(processingEnv, e, msg)) { return; } processingEnv.getMessager().printMessage(Kind.ERROR, msg, e); } }