Source code
/*
* JSweet transpiler - http://www.jsweet.org
* Copyright (C) 2015 CINCHEO SAS <renaud.pawlak@cincheo.fr>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jsweet.transpiler;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.TypeMirror;
import org.jsweet.JSweetConfig;
import org.jsweet.transpiler.util.AbstractTreeScanner;
import org.jsweet.transpiler.util.Util;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.MethodSymbol;
import com.sun.tools.javac.code.Symbol.VarSymbol;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCBlock;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.tree.JCTree.JCLiteral;
import com.sun.tools.javac.tree.JCTree.JCMethodDecl;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.tree.JCTree.JCWildcard;
/**
* This AST scanner performs global analysis and fills up the context with
* information that will be used by the translator.
*
* @see JSweetContext
* @author Renaud Pawlak
*/
public class GlobalBeforeTranslationScanner extends AbstractTreeScanner {
Set<JCVariableDecl> lazyInitializedStaticCandidates = new HashSet<>();
/**
* Creates a new global scanner.
*/
public GlobalBeforeTranslationScanner(TranspilationHandler logHandler, JSweetContext context) {
super(logHandler, context, null);
}
@Override
public void visitTopLevel(JCCompilationUnit topLevel) {
if (topLevel.packge.getQualifiedName().toString().startsWith(JSweetConfig.LIBS_PACKAGE + ".")) {
return;
}
this.compilationUnit = topLevel;
super.visitTopLevel(topLevel);
}
@Override
public void visitClassDef(JCClassDecl classdecl) {
if (getCompilationUnit().docComments.hasComment(classdecl)) {
context.docComments.put(classdecl.sym, getCompilationUnit().docComments.getCommentText(classdecl));
}
TypeMirror superClassType = context.modelTypes.erasure(((TypeElement) classdecl.sym).getSuperclass());
if (superClassType.toString().startsWith("java.") && !superClassType.toString().equals(Object.class.getName())
&& !context.types.isSubtype(classdecl.type, context.symtab.throwableType)
&& !Util.isSourceElement(context.modelTypes.asElement(superClassType))) {
// the class extends a JDK class
context.addJdkSubclass(classdecl.sym.toString(), superClassType);
}
if (classdecl.sym.getEnclosingElement() instanceof ClassSymbol) {
Type superClass = ((ClassSymbol) classdecl.sym.getEnclosingElement()).getSuperclass();
if (superClass != null && superClass.tsym != null) {
ClassSymbol clashingInnerClass = Util.findInnerClassDeclaration((ClassSymbol) superClass.tsym,
classdecl.name.toString());
if (clashingInnerClass != null && !context.hasClassNameMapping(clashingInnerClass)) {
context.addClassNameMapping(classdecl.sym,
"__" + classdecl.sym.getEnclosingElement().getQualifiedName().toString().replace('.', '_')
+ "_" + clashingInnerClass.getSimpleName());
}
}
} else {
if (classdecl.sym.getKind() == ElementKind.ANNOTATION_TYPE
&& context.hasAnnotationType(classdecl.sym, JSweetConfig.ANNOTATION_DECORATOR)) {
context.registerDecoratorAnnotation(classdecl);
}
}
boolean globals = false;
if (JSweetConfig.GLOBALS_CLASS_NAME.equals(classdecl.name.toString())) {
globals = true;
}
for (JCTree def : classdecl.defs) {
if (def instanceof JCVariableDecl) {
JCVariableDecl var = (JCVariableDecl) def;
if (getCompilationUnit().docComments.hasComment(var)) {
context.docComments.put(var.sym, getCompilationUnit().docComments.getCommentText(var));
}
if (!context.hasFieldNameMapping(var.sym)) {
VarSymbol clashingField = null;
clashingField = Util.findFieldDeclaration((ClassSymbol) classdecl.sym.getSuperclass().tsym,
var.name);
if (clashingField != null) {
if (clashingField.isPrivate() && !context.hasFieldNameMapping(clashingField)) {
context.addFieldNameMapping(var.sym, JSweetConfig.FIELD_METHOD_CLASH_RESOLVER_PREFIX
+ classdecl.sym.toString().replace(".", "_") + "_" + var.name.toString());
}
}
MethodSymbol m = Util.findMethodDeclarationInType(context.types, classdecl.sym, var.name.toString(),
null);
if (m != null) {
context.addFieldNameMapping(var.sym,
JSweetConfig.FIELD_METHOD_CLASH_RESOLVER_PREFIX + var.name.toString());
}
}
if (var.getModifiers().getFlags().contains(Modifier.STATIC)) {
if (!(var.getModifiers().getFlags().contains(Modifier.FINAL) && var.init != null
&& var.init instanceof JCLiteral)) {
lazyInitializedStaticCandidates.add(var);
}
}
} else if (def instanceof JCBlock) {
if (((JCBlock) def).isStatic()) {
context.countStaticInitializer(classdecl.sym);
}
}
if (globals && def instanceof JCMethodDecl) {
if (((JCMethodDecl) def).sym.isStatic()) {
context.registerGlobalMethod(classdecl, (JCMethodDecl) def);
}
}
}
super.visitClassDef(classdecl);
}
@Override
public void visitMethodDef(JCMethodDecl methodDecl) {
if (getCompilationUnit().docComments.hasComment(methodDecl)) {
context.docComments.put(methodDecl.sym, getCompilationUnit().docComments.getCommentText(methodDecl));
}
if (methodDecl.mods.getFlags().contains(Modifier.DEFAULT)) {
getContext().addDefaultMethod(compilationUnit, getParent(JCClassDecl.class), methodDecl);
}
if (!getContext().ignoreWildcardBounds) {
scan(methodDecl.params);
}
}
@Override
public void visitWildcard(JCWildcard wildcard) {
Symbol container = null;
JCMethodDecl method = getParent(JCMethodDecl.class);
if (method != null) {
container = method.sym;
}
if (container != null) {
getContext().registerWildcard(container, wildcard);
scan(wildcard.getBound());
}
}
public void process(List<JCCompilationUnit> compilationUnits) {
for (JCCompilationUnit compilationUnit : compilationUnits) {
scan(compilationUnit);
}
for (JCVariableDecl var : lazyInitializedStaticCandidates) {
if (context.getStaticInitializerCount(var.sym.enclClass()) == 0 && var.init == null
|| Util.isLiteralExpression(var.init)) {
continue;
}
context.lazyInitializedStatics.add(var.sym);
}
}
}