Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2011, 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

  */

 import java.lang.reflect.Field;

 import javax.lang.model.element.Element;

 import javax.lang.model.element.ExecutableElement;

 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;

             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 ElementScanner8<Void, Void> {

         @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 SimpleTypeVisitor7<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;

             }

         }

     };

 }