| /* |
| * 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. |
| * |
| * 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 org.graalvm.compiler.nodeinfo.processor; |
| |
| import static java.util.Collections.reverse; |
| |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import javax.annotation.processing.AbstractProcessor; |
| import javax.annotation.processing.FilerException; |
| import javax.annotation.processing.ProcessingEnvironment; |
| import javax.annotation.processing.RoundEnvironment; |
| import javax.annotation.processing.SupportedAnnotationTypes; |
| import javax.annotation.processing.SupportedSourceVersion; |
| import javax.lang.model.SourceVersion; |
| import javax.lang.model.element.Element; |
| import javax.lang.model.element.ElementKind; |
| import javax.lang.model.element.Modifier; |
| import javax.lang.model.element.TypeElement; |
| import javax.lang.model.util.Types; |
| import javax.tools.Diagnostic.Kind; |
| |
| import org.graalvm.compiler.nodeinfo.NodeInfo; |
| |
| @SupportedSourceVersion(SourceVersion.RELEASE_8) |
| @SupportedAnnotationTypes({"org.graalvm.compiler.nodeinfo.NodeInfo"}) |
| public class GraphNodeProcessor extends AbstractProcessor { |
| @Override |
| public SourceVersion getSupportedSourceVersion() { |
| return SourceVersion.latest(); |
| } |
| |
| /** |
| * Node class currently being processed. |
| */ |
| private Element scope; |
| |
| public static boolean isEnclosedIn(Element e, Element scopeElement) { |
| List<Element> elementHierarchy = getElementHierarchy(e); |
| return elementHierarchy.contains(scopeElement); |
| } |
| |
| void errorMessage(Element element, String format, Object... args) { |
| message(Kind.ERROR, element, format, args); |
| } |
| |
| void message(Kind kind, Element element, String format, Object... args) { |
| if (scope != null && !isEnclosedIn(element, scope)) { |
| // See https://bugs.eclipse.org/bugs/show_bug.cgi?id=428357#c1 |
| List<Element> elementHierarchy = getElementHierarchy(element); |
| reverse(elementHierarchy); |
| String loc = elementHierarchy.stream().filter(e -> e.getKind() != ElementKind.PACKAGE).map(Object::toString).collect(Collectors.joining(".")); |
| processingEnv.getMessager().printMessage(kind, String.format(loc + ": " + format, args), scope); |
| } else { |
| processingEnv.getMessager().printMessage(kind, String.format(format, args), element); |
| } |
| } |
| |
| private static List<Element> getElementHierarchy(Element e) { |
| List<Element> elements = new ArrayList<>(); |
| elements.add(e); |
| |
| Element enclosing = e.getEnclosingElement(); |
| while (enclosing != null && enclosing.getKind() != ElementKind.PACKAGE) { |
| elements.add(enclosing); |
| enclosing = enclosing.getEnclosingElement(); |
| } |
| if (enclosing != null) { |
| elements.add(enclosing); |
| } |
| return elements; |
| } |
| |
| /** |
| * Bugs in an annotation processor can cause silent failure so try to report any exception |
| * throws as errors. |
| */ |
| private void reportException(Kind kind, Element element, Throwable t) { |
| StringWriter buf = new StringWriter(); |
| t.printStackTrace(new PrintWriter(buf)); |
| buf.toString(); |
| message(kind, element, "Exception thrown during processing: %s", buf.toString()); |
| } |
| |
| ProcessingEnvironment getProcessingEnv() { |
| return processingEnv; |
| } |
| |
| boolean isNodeType(Element element) { |
| if (element.getKind() != ElementKind.CLASS) { |
| return false; |
| } |
| TypeElement type = (TypeElement) element; |
| Types types = processingEnv.getTypeUtils(); |
| |
| while (type != null) { |
| if (type.toString().equals("org.graalvm.compiler.graph.Node")) { |
| return true; |
| } |
| type = (TypeElement) types.asElement(type.getSuperclass()); |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) { |
| if (roundEnv.processingOver()) { |
| return false; |
| } |
| |
| GraphNodeVerifier verifier = new GraphNodeVerifier(this); |
| |
| for (Element element : roundEnv.getElementsAnnotatedWith(NodeInfo.class)) { |
| scope = element; |
| try { |
| if (!isNodeType(element)) { |
| errorMessage(element, "%s can only be applied to Node subclasses", NodeInfo.class.getSimpleName()); |
| continue; |
| } |
| |
| NodeInfo nodeInfo = element.getAnnotation(NodeInfo.class); |
| if (nodeInfo == null) { |
| errorMessage(element, "Cannot get %s annotation from annotated element", NodeInfo.class.getSimpleName()); |
| continue; |
| } |
| |
| TypeElement typeElement = (TypeElement) element; |
| |
| Set<Modifier> modifiers = typeElement.getModifiers(); |
| if (!modifiers.contains(Modifier.FINAL) && !modifiers.contains(Modifier.ABSTRACT)) { |
| // TODO(thomaswue): Reenable this check. |
| // errorMessage(element, "%s annotated class must be either final or abstract", |
| // NodeInfo.class.getSimpleName()); |
| // continue; |
| } |
| boolean found = false; |
| for (Element e : typeElement.getEnclosedElements()) { |
| if (e.getKind() == ElementKind.FIELD) { |
| if (e.getSimpleName().toString().equals("TYPE")) { |
| found = true; |
| break; |
| } |
| } |
| } |
| if (!found) { |
| errorMessage(element, "%s annotated class must have a field named TYPE", NodeInfo.class.getSimpleName()); |
| } |
| |
| if (!typeElement.equals(verifier.Node) && !modifiers.contains(Modifier.ABSTRACT)) { |
| verifier.verify(typeElement); |
| } |
| } catch (ElementException ee) { |
| errorMessage(ee.element, ee.getMessage()); |
| } catch (Throwable t) { |
| reportException(isBug367599(t) ? Kind.NOTE : Kind.ERROR, element, t); |
| } finally { |
| scope = null; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Determines if a given exception is (most likely) caused by |
| * <a href="https://bugs.eclipse.org/bugs/show_bug.cgi?id=367599">Bug 367599</a>. |
| */ |
| public static boolean isBug367599(Throwable t) { |
| if (t instanceof FilerException) { |
| for (StackTraceElement ste : t.getStackTrace()) { |
| if (ste.toString().contains("org.eclipse.jdt.internal.apt.pluggable.core.filer.IdeFilerImpl.create")) { |
| // See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=367599 |
| return true; |
| } |
| } |
| } |
| if (t.getCause() != null) { |
| return isBug367599(t.getCause()); |
| } |
| return false; |
| } |
| } |