| /* |
| * Copyright (c) 2012, 2015, 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. |
| */ |
| |
| 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; |
| } |