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/*
* 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;
}
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