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

 /*

  * Copyright (c) 2012, 2013, 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

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 import com.sun.source.tree.ExpressionTree;

 import com.sun.source.tree.Tree;

 import com.sun.source.tree.TypeCastTree;

 import com.sun.source.tree.VariableTree;

 import com.sun.source.util.TreePathScanner;

 import com.sun.source.util.Trees;

 import com.sun.source.util.TreePath;

 import com.sun.tools.javac.tree.JCTree.JCExpression;

 import java.util.Set;

 import javax.annotation.processing.RoundEnvironment;

 import javax.annotation.processing.SupportedAnnotationTypes;

 import javax.lang.model.element.Element;

 import javax.lang.model.element.TypeElement;

 import javax.lang.model.type.TypeMirror;

 import javax.lang.model.type.TypeKind;

 import javax.lang.model.type.IntersectionType;

 import javax.lang.model.type.UnknownTypeException;

 import javax.lang.model.util.SimpleTypeVisitor6;

 import javax.lang.model.util.SimpleTypeVisitor7;

 @SupportedAnnotationTypes("Check")

 public class ModelChecker extends JavacTestingAbstractProcessor {

     @Override

     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {

         if (roundEnv.processingOver())

             return true;

         Trees trees = Trees.instance(processingEnv);

         TypeElement testAnno = elements.getTypeElement("Check");

         for (Element elem: roundEnv.getElementsAnnotatedWith(testAnno)) {

             TreePath p = trees.getPath(elem);

             new IntersectionCastTester(trees).scan(p, null);

         }

         return true;

     }

     class IntersectionCastTester extends TreePathScanner<Void, Void> {

         Trees trees;

         public IntersectionCastTester(Trees trees) {

             super();

             this.trees = trees;

         }

         @Override

         public Void visitVariable(VariableTree node, Void p) {

             TreePath varPath = new TreePath(getCurrentPath(), node);

             Element v = trees.getElement(varPath);

             IntersectionTypeInfo it = v.getAnnotation(IntersectionTypeInfo.class);

             assertTrue(it != null, "IntersectionType annotation must be present");

             ExpressionTree varInit = node.getInitializer();

             assertTrue(varInit != null && varInit.getKind() == Tree.Kind.TYPE_CAST,

                     "variable must have be initialized to an expression containing an intersection type cast");

             TypeMirror t = ((JCExpression)((TypeCastTree)varInit).getType()).type;

             validateIntersectionTypeInfo(t, it);

             for (Element e2 : types.asElement(t).getEnclosedElements()) {

                 assertTrue(false, "an intersection type has no declared members");

             }

             for (Element e2 : elements.getAllMembers((TypeElement)types.asElement(t))) {

                 Member m = e2.getAnnotation(Member.class);

                 if (m != null) {

                     assertTrue(e2.getKind() == m.value(), "Expected " + m.value() + " - found " + e2.getKind());

                 }

             }

             assertTrue(assertionCount == 9, "Expected 9 assertions - found " + assertionCount);

             return super.visitVariable(node, p);

         }

     }

     private void validateIntersectionTypeInfo(TypeMirror expectedIntersectionType, IntersectionTypeInfo it) {

         assertTrue(expectedIntersectionType.getKind() == TypeKind.INTERSECTION, "INTERSECTION kind expected");

         try {

             new SimpleTypeVisitor6<Void, Void>(){}.visit(expectedIntersectionType);

             throw new RuntimeException("Expected UnknownTypeException not thrown.");

         } catch (UnknownTypeException ute) {

             ; // Expected

         }

         try {

             new SimpleTypeVisitor7<Void, Void>(){}.visit(expectedIntersectionType);

             throw new RuntimeException("Expected UnknownTypeException not thrown.");

         } catch (UnknownTypeException ute) {

             ; // Expected

         }

         IntersectionType intersectionType = new SimpleTypeVisitor<IntersectionType, Void>(){

             @Override

             protected IntersectionType defaultAction(TypeMirror e, Void p) {return null;}

             @Override

             public IntersectionType visitIntersection(IntersectionType t, Void p) {return t;}

         }.visit(expectedIntersectionType);

         assertTrue(intersectionType != null, "Must get a non-null intersection type.");

         assertTrue(it.value().length == intersectionType.getBounds().size(), "Cardinalities do not match");

         String[] typeNames = it.value();

         for(int i = 0; i < typeNames.length; i++) {

             TypeMirror typeFromAnnotation = nameToType(typeNames[i]);

             assertTrue(types.isSameType(typeFromAnnotation, intersectionType.getBounds().get(i)),

                        "Types were not equal.");

         }

     }

     private TypeMirror nameToType(String name) {

         return elements.getTypeElement(name).asType();

     }

     private static void assertTrue(boolean cond, String msg) {

         assertionCount++;

         if (!cond)

             throw new AssertionError(msg);

     }

     static int assertionCount = 0;

 }