--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/types/GenericTypeWellFormednessTest.java Fri Jan 14 09:45:52 2011 +0000
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2010, 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 7007432 7006109
+ * @summary Test generic types well-formedness
+ * @author mcimadamore
+ * @library .
+ * @run main GenericTypeWellFormednessTest
+ */
+
+import com.sun.tools.javac.code.BoundKind;
+import com.sun.tools.javac.code.Type;
+import com.sun.tools.javac.code.Type.*;
+import com.sun.tools.javac.code.Symbol;
+import com.sun.tools.javac.code.Symbol.*;
+import java.lang.reflect.Array;
+
+/**
+ * Check parameterized type well-formedness. This test executes a number of checks
+ * in order to establish as to whether an instantiation of a generic type conforms
+ * to the generic class' declared bounds.
+ */
+public class GenericTypeWellFormednessTest extends TypeHarness {
+
+ static int executedCount = 0;
+ static int ignoredCount = 0;
+
+ InstantiableType[] rows;
+ Type[] columns;
+
+ static class InstantiableType {
+ protected Type type;
+
+ public InstantiableType(Type type) {
+ this.type = type;
+ }
+
+ Type inst(Type clazz) {
+ return type;
+ }
+ }
+
+ enum Result {
+ /* generic type is well-formed w.r.t. declared bounds */
+ OK(true),
+ /* generic type is not well-formed w.r.t. declared bounds */
+ FAIL(false),
+ /* generic type is not well-formed w.r.t. declared bounds according to the JLS 3rd,
+ * but javac allows it (spec for generic type well-formedness is overly restrictive)
+ * See regression test test/tools/generics/wildcards/T5097548.java
+ */
+ IGNORE(false);
+
+ boolean value;
+
+ Result(boolean value) {
+ this.value = value;
+ }
+ }
+
+ static final Result T = Result.OK;
+ static final Result F = Result.FAIL;
+ static final Result I = Result.IGNORE;
+
+ /*is a type in 'rows' a valid instantiation for the generic class in 'col' ? */
+ Result[][] isValidInstantiation = {
+ //Foo<X>, Foo<X ext Object>, Foo<X ext Number>, Foo<X ext Foo<X>>, Foo<X ext Foo<+X>>, Foo<X ext Foo<-X>>, Foo<X ext Foo<?>>
+ /*Foo<Object>*/ { T , T , F , F , F , F , F },
+ /*Foo<Number>*/ { T , T , T , F , F , F , F },
+ /*Foo<Integer>*/ { T , T , T , F , F , F , F },
+ /*Foo<Double>*/ { T , T , T , F , F , F , F },
+ /*Foo<String>*/ { T , T , F , F , F , F , F },
+ /*Foo<X1>*/ { T , T , F , F , F , F , F },
+ /*Foo<X2>*/ { T , T , T , F , F , F , F },
+ /*Foo<X3>*/ { T , T , T , F , F , F , F },
+ /*Foo<X4>*/ { T , T , T , F , F , F , F },
+ /*Foo<X5>*/ { T , T , F , F , F , F , F },
+ /*Foo<X6>*/ { T , T , F , T , T , T , T },
+ /*Foo<+Object>*/ { T , T , I , I , I , I , I },
+ /*Foo<+Number>*/ { T , T , T , F , F , F , F },
+ /*Foo<+Integer>*/{ T , T , T , F , F , F , F },
+ /*Foo<+Double>*/ { T , T , T , F , F , F , F },
+ /*Foo<+String>*/ { T , T , F , F , F , F , F },
+ /*Foo<+X1>*/ { T , T , F , F , F , F , F },
+ /*Foo<+X2>*/ { T , T , T , F , F , F , F },
+ /*Foo<+X3>*/ { T , T , T , F , F , F , F },
+ /*Foo<+X4>*/ { T , T , T , F , F , F , F },
+ /*Foo<+X5>*/ { T , T , F , F , F , F , F },
+ /*Foo<+X6>*/ { T , T , F , T , T , I , T },
+ /*Foo<-Object>*/ { T , T , F , F , F , F , F },
+ /*Foo<-Number>*/ { T , T , T , F , F , F , F },
+ /*Foo<-Integer>*/{ T , T , T , F , F , F , F },
+ /*Foo<-Double>*/ { T , T , T , F , F , F , F },
+ /*Foo<-String>*/ { T , T , F , F , F , F , F },
+ /*Foo<-X1>*/ { T , T , I , I , I , I , I },
+ /*Foo<-X2>*/ { T , T , I , F , F , F , F },
+ /*Foo<-X3>*/ { T , T , I , F , F , F , F },
+ /*Foo<-X4>*/ { T , T , I , F , F , F , F },
+ /*Foo<-X5>*/ { T , T , I , F , F , F , F },
+ /*Foo<-X6>*/ { T , T , F , T , I , I , T },
+ /*Foo<?>*/ { T , T , T , T , T , T , T }};
+
+ GenericTypeWellFormednessTest() {
+ InstantiableType[] basicTypes = {
+ new InstantiableType(predef.objectType),
+ new InstantiableType(NumberType()),
+ new InstantiableType(box(predef.intType)),
+ new InstantiableType(box(predef.doubleType)),
+ new InstantiableType(predef.stringType) };
+
+ InstantiableType[] typeVars = new InstantiableType[basicTypes.length + 1];
+ for (int i = 0 ; i < basicTypes.length ; i++) {
+ typeVars[i] = new InstantiableType(fac.TypeVariable(basicTypes[i].type));
+ }
+ typeVars[typeVars.length - 1] = new InstantiableType(null) {
+ Type inst(Type clazz) {
+ TypeVar tvar = fac.TypeVariable();
+ tvar.bound = subst(clazz, Mapping(clazz.getTypeArguments().head, tvar));
+ return tvar;
+ }
+ };
+
+ InstantiableType[] typeArgs = join(InstantiableType.class, basicTypes, typeVars);
+
+ InstantiableType[] invariantTypes = new InstantiableType[typeArgs.length];
+ for (int i = 0 ; i < typeArgs.length ; i++) {
+ final InstantiableType type1 = typeArgs[i];
+ invariantTypes[i] = new InstantiableType(typeArgs[i].type) {
+ Type inst(Type clazz) {
+ return subst(clazz, Mapping(clazz.getTypeArguments().head, type1.inst(clazz)));
+ }
+ };
+ }
+
+ InstantiableType[] covariantTypes = new InstantiableType[typeArgs.length];
+ for (int i = 0 ; i < typeArgs.length ; i++) {
+ final InstantiableType type1 = typeArgs[i];
+ covariantTypes[i] = new InstantiableType(null) {
+ Type inst(Type clazz) {
+ Type t = fac.Wildcard(BoundKind.EXTENDS, type1.inst(clazz));
+ return subst(clazz, Mapping(clazz.getTypeArguments().head, t));
+ }
+ };
+ }
+
+ InstantiableType[] contravariantTypes = new InstantiableType[typeArgs.length];
+ for (int i = 0 ; i < typeArgs.length ; i++) {
+ final InstantiableType type1 = typeArgs[i];
+ contravariantTypes[i] = new InstantiableType(null) {
+ Type inst(Type clazz) {
+ Type t = fac.Wildcard(BoundKind.SUPER, type1.inst(clazz));
+ return subst(clazz, Mapping(clazz.getTypeArguments().head, t));
+ }
+ };
+ }
+
+ InstantiableType[] bivariantTypes = {
+ new InstantiableType(fac.Wildcard(BoundKind.UNBOUND, predef.objectType)) {
+ Type inst(Type clazz) {
+ return subst(clazz, Mapping(clazz.getTypeArguments().head, type));
+ }
+ }
+ };
+
+ rows = join(InstantiableType.class, invariantTypes, covariantTypes, contravariantTypes, bivariantTypes);
+
+ Type tv1 = fac.TypeVariable();
+ Type decl1 = fac.Class(tv1);
+
+ Type tv2 = fac.TypeVariable(predef.objectType);
+ Type decl2 = fac.Class(tv2);
+
+ Type tv3 = fac.TypeVariable(NumberType());
+ Type decl3 = fac.Class(tv3);
+
+ TypeVar tv4 = fac.TypeVariable();
+ Type decl4 = fac.Class(tv4);
+ tv4.bound = decl4;
+ tv4.tsym.name = predef.exceptionType.tsym.name;
+
+ TypeVar tv5 = fac.TypeVariable();
+ Type decl5 = fac.Class(tv5);
+ tv5.bound = subst(decl5, Mapping(tv5, fac.Wildcard(BoundKind.EXTENDS, tv5)));
+
+ TypeVar tv6 = fac.TypeVariable();
+ Type decl6 = fac.Class(tv6);
+ tv6.bound = subst(decl6, Mapping(tv6, fac.Wildcard(BoundKind.SUPER, tv6)));
+
+ TypeVar tv7 = fac.TypeVariable();
+ Type decl7 = fac.Class(tv7);
+ tv7.bound = subst(decl7, Mapping(tv7, fac.Wildcard(BoundKind.UNBOUND, predef.objectType)));
+
+ columns = new Type[] {
+ decl1, decl2, decl3, decl4, decl5, decl6, decl7
+ };
+ }
+
+ void test() {
+ for (int i = 0; i < rows.length ; i++) {
+ for (int j = 0; j < columns.length ; j++) {
+ Type decl = columns[j];
+ Type inst = rows[i].inst(decl);
+ if (isValidInstantiation[i][j] != Result.IGNORE) {
+ executedCount++;
+ assertValidGenericType(inst, isValidInstantiation[i][j].value);
+ } else {
+ ignoredCount++;
+ }
+ }
+ }
+ }
+
+ Type NumberType() {
+ Symbol s = box(predef.intType).tsym;
+ s.complete();
+ return ((ClassType)s.type).supertype_field;
+ }
+
+ @SuppressWarnings("unchecked")
+ <T> T[] join(Class<T> type, T[]... args) {
+ int totalLength = 0;
+ for (T[] arr : args) {
+ totalLength += arr.length;
+ }
+ T[] new_arr = (T[])Array.newInstance(type, totalLength);
+ int idx = 0;
+ for (T[] arr : args) {
+ System.arraycopy(arr, 0, new_arr, idx, arr.length);
+ idx += arr.length;
+ }
+ return new_arr;
+ }
+
+ public static void main(String[] args) {
+ new GenericTypeWellFormednessTest().test();
+ System.out.println("Executed checks : " + executedCount);
+ System.out.println("Ignored checks : " + ignoredCount);
+ }
+}