/*
* Copyright (c) 2011, 2016, 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.
*/
/*
* @test
* @bug 7021183 7025809
* @summary 269: assertion failure getting enclosing element of an undefined name
* @modules jdk.compiler/com.sun.tools.javac.code:+open
* jdk.compiler/com.sun.tools.javac.file
* jdk.compiler/com.sun.tools.javac.main
* jdk.compiler/com.sun.tools.javac.model
* jdk.compiler/com.sun.tools.javac.util
*/
import java.lang.reflect.Field;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.ModuleElement;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.TypeParameterElement;
import javax.lang.model.element.UnknownElementException;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.type.UnknownTypeException;
import javax.lang.model.util.*;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symtab;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.main.JavaCompiler;
import com.sun.tools.javac.model.JavacTypes;
import com.sun.tools.javac.util.Context;
/**
* Scan javac Symtab looking for TypeMirrors and Elements, and ensure that
* no exceptions are thrown when used with javax.lang.model visitors.
*
*/
public class TestSymtabItems {
public static void main(String... args) throws Exception {
new TestSymtabItems().run();
}
void run() throws Exception {
Context c = new Context();
JavacFileManager.preRegister(c);
Symtab syms = Symtab.instance(c);
JavacTypes types = JavacTypes.instance(c);
JavaCompiler.instance(c); // will init ClassReader.sourceCompleter
// print("noSymbol", syms.noSymbol);
// print("errSymbol", syms.errSymbol);
// print("unknownSymbol", syms.unknownSymbol);
// print("botType", syms.botType);
// print("errType", syms.errType);
// print("unknownType", syms.unknownType);
for (Field f: Symtab.class.getDeclaredFields()) {
// System.err.println(f.getType() + " " + f.getName());
// Temporarily ignore methodHandle and transientMethodHandle
// during API evolution
if (f.getName().toLowerCase().contains("methodhandle"))
continue;
//both noModule and unnamedModule claim the unnamed package, ignore noModule for now:
if (f.getName().equals("noModule"))
continue;
f.setAccessible(true);
Class<?> ft = f.getType();
if (TypeMirror.class.isAssignableFrom(ft))
print(f.getName(), (TypeMirror) f.get(syms), types);
else if(Element.class.isAssignableFrom(ft))
print(f.getName(), (Element) f.get(syms));
}
if (errors > 0)
throw new Exception(errors + " errors occurred");
}
void print(String label, Element e) {
ElemPrinter ep = new ElemPrinter();
System.err.println("Test " + label);
ep.visit(e);
System.err.println();
}
void print(String label, TypeMirror t, Types types) {
TypePrinter tp = new TypePrinter();
System.err.println("Test " + label);
tp.visit(t, types);
System.err.println();
}
void error(String msg) {
System.err.println("Error: " + msg);
errors++;
}
int errors;
class ElemPrinter extends ElementScanner9<Void, Void> {
@Override
public Void visitModule(ModuleElement e, Void p) {
show("module", e);
indent(+1);
super.visitModule(e, p);
indent(-1);
return null;
}
@Override
public Void visitPackage(PackageElement e, Void p) {
show("package", e);
indent(+1);
super.visitPackage(e, p);
indent(-1);
return null;
}
@Override
public Void visitType(TypeElement e, Void p) {
show("type", e);
indent(+1);
super.visitType(e, p);
indent(-1);
return null;
}
@Override
public Void visitVariable(VariableElement e, Void p) {
show("variable", e);
indent(+1);
super.visitVariable(e, p);
indent(-1);
return null;
}
@Override
public Void visitExecutable(ExecutableElement e, Void p) {
show("executable", e);
indent(+1);
super.visitExecutable(e, p);
indent(-1);
return null;
}
@Override
public Void visitTypeParameter(TypeParameterElement e, Void p) {
show("type parameter", e);
indent(+1);
super.visitTypeParameter(e, p);
indent(-1);
return null;
}
@Override
public Void visitUnknown(Element e, Void p) {
show("unknown", e);
indent(+1);
try {
super.visitUnknown(e, p);
} catch (UnknownElementException ex) {
System.err.println("caught " + ex);
}
indent(-1);
return null;
}
void indent(int i) {
indent += i;
}
String sp(int w) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < w; i++)
sb.append(" ");
return sb.toString();
}
void show(String label, Element e) {
System.err.println(sp(indent) + label
+ ": mods:" + e.getModifiers()
+ " " + e.getSimpleName()
+ ", kind: " + e.getKind()
+ ", type: " + e.asType()
+ ", encl: " + e.getEnclosingElement());
// The following checks help establish why NPE might occur when trying to scan children
if (e instanceof ClassSymbol) {
ClassSymbol csym = (ClassSymbol) e;
if (csym.members_field == null)
error("members_field is null");
if (csym.type == null)
System.err.println("type is null");
}
}
int indent;
};
class TypePrinter extends SimpleTypeVisitor9<Void, Types> {
@Override
public Void defaultAction(TypeMirror m, Types types) {
System.err.println(m.getKind() + " " + m + " " + types.asElement(m));
return null;
}
@Override
public Void visitUnknown(TypeMirror t, Types types) {
try {
return super.visitUnknown(t, types);
} catch (UnknownTypeException ex) {
System.err.println("caught " + ex);
return null;
}
}
};
}