| /* |
| * Copyright (c) 2010, 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 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); |
| } |
| } |
