Mercurial > hg > graal-compiler
diff graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/codewriter/FixWarningsVisitor.java @ 10597:79041ab43660
Truffle-DSL: API-change: Renamed truffle.api.codegen to truffle.api.dsl for all projects and packages.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 01 Jul 2013 20:58:32 +0200 |
parents | |
children | bd28da642eea |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/codewriter/FixWarningsVisitor.java Mon Jul 01 20:58:32 2013 +0200 @@ -0,0 +1,128 @@ +/* + * Copyright (c) 2012, 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.codewriter; + +import static com.oracle.truffle.dsl.processor.Utils.*; +import static javax.lang.model.element.Modifier.*; + +import java.io.*; +import java.util.*; + +import javax.lang.model.element.*; +import javax.lang.model.type.*; + +import com.oracle.truffle.dsl.processor.*; +import com.oracle.truffle.dsl.processor.ast.*; + +public class FixWarningsVisitor extends CodeElementScanner<Void, Void> { + + private final Set<String> symbolsUsed = new HashSet<>(); + + private final ProcessorContext context; + private final DeclaredType unusedAnnotation; + private final DeclaredType overrideType; + + public FixWarningsVisitor(ProcessorContext context, DeclaredType unusedAnnotation, DeclaredType overrideType) { + this.context = context; + this.unusedAnnotation = unusedAnnotation; + this.overrideType = overrideType; + } + + @Override + public Void visitType(CodeTypeElement e, Void p) { + List<TypeElement> superTypes = Utils.getSuperTypes(e); + for (TypeElement type : superTypes) { + String qualifiedName = Utils.getQualifiedName(type); + if (qualifiedName.equals(Serializable.class.getCanonicalName())) { + if (!e.containsField("serialVersionUID")) { + e.add(new CodeVariableElement(modifiers(PRIVATE, STATIC, FINAL), context.getType(long.class), "serialVersionUID", "1L")); + } + break; + } + } + + return super.visitType(e, p); + } + + @Override + public Void visitExecutable(CodeExecutableElement e, Void p) { + if (e.getParameters().isEmpty()) { + return null; + } else if (e.getModifiers().contains(Modifier.ABSTRACT)) { + return null; + } else if (containsOverride(e)) { + return null; + } + + symbolsUsed.clear(); + super.visitExecutable(e, p); + if (e.getBodyTree() == null && e.getBody() != null) { + computeSymbols(e.getBody()); + } + + for (VariableElement parameter : e.getParameters()) { + if (!symbolsUsed.contains(parameter.getSimpleName().toString())) { + e.getAnnotationMirrors().add(createUnusedAnnotationMirror()); + break; + } + } + return null; + } + + private boolean containsOverride(CodeExecutableElement e) { + for (AnnotationMirror mirror : e.getAnnotationMirrors()) { + if (Utils.typeEquals(overrideType, mirror.getAnnotationType())) { + return true; + } + } + return false; + } + + private CodeAnnotationMirror createUnusedAnnotationMirror() { + CodeAnnotationMirror mirror = new CodeAnnotationMirror(unusedAnnotation); + mirror.setElementValue(mirror.findExecutableElement("value"), new CodeAnnotationValue("unused")); + return mirror; + } + + @Override + public void visitTree(CodeTree e, Void p) { + if (e.getString() != null) { + computeSymbols(e.getString()); + } + super.visitTree(e, p); + } + + private void computeSymbols(String s) { + // TODO there should not be any need for a StringTokenizer if we have a real AST for + // method bodies. Also the current solution is not perfect. What if one token + // is spread across multiple CodeTree instances? But for now that works. + StringTokenizer tokenizer = new StringTokenizer(s, ".= :,()[];{}\"\"'' ", false); + while (tokenizer.hasMoreElements()) { + String token = tokenizer.nextToken().trim(); + if (token.length() > 0) { + symbolsUsed.add(token); + } + } + } + +}