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test/tools/javac/types/GenericTypeWellFormednessTest.java@959103a6100f (annotated)

test/tools/javac/types/GenericTypeWellFormednessTest.java

Wed, 27 Apr 2016 01:34:52 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:34:52 +0800

changeset 0

959103a6100f

child 2525

2eb010b6cb22

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/langtools/
changeset: 2573:53ca196be1ae
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 7007432 7006109
aoqi@0	27	* @summary Test generic types well-formedness
aoqi@0	28	* @author mcimadamore
aoqi@0	29	* @library .
aoqi@0	30	* @run main GenericTypeWellFormednessTest
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import com.sun.tools.javac.code.BoundKind;
aoqi@0	34	import com.sun.tools.javac.code.Type;
aoqi@0	35	import com.sun.tools.javac.code.Type.*;
aoqi@0	36	import com.sun.tools.javac.code.Symbol;
aoqi@0	37	import com.sun.tools.javac.code.Symbol.*;
aoqi@0	38	import java.lang.reflect.Array;
aoqi@0	39
aoqi@0	40	/**
aoqi@0	41	* Check parameterized type well-formedness. This test executes a number of checks
aoqi@0	42	* in order to establish as to whether an instantiation of a generic type conforms
aoqi@0	43	* to the generic class' declared bounds.
aoqi@0	44	*/
aoqi@0	45	public class GenericTypeWellFormednessTest extends TypeHarness {
aoqi@0	46
aoqi@0	47	static int executedCount = 0;
aoqi@0	48	static int ignoredCount = 0;
aoqi@0	49
aoqi@0	50	InstantiableType[] rows;
aoqi@0	51	Type[] columns;
aoqi@0	52
aoqi@0	53	static class InstantiableType {
aoqi@0	54	protected Type type;
aoqi@0	55
aoqi@0	56	public InstantiableType(Type type) {
aoqi@0	57	this.type = type;
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	Type inst(Type clazz) {
aoqi@0	61	return type;
aoqi@0	62	}
aoqi@0	63	}
aoqi@0	64
aoqi@0	65	enum Result {
aoqi@0	66	/* generic type is well-formed w.r.t. declared bounds */
aoqi@0	67	OK(true),
aoqi@0	68	/* generic type is not well-formed w.r.t. declared bounds */
aoqi@0	69	FAIL(false),
aoqi@0	70	/* generic type is not well-formed w.r.t. declared bounds according to the JLS 3rd,
aoqi@0	71	* but javac allows it (spec for generic type well-formedness is overly restrictive)
aoqi@0	72	* See regression test test/tools/generics/wildcards/T5097548.java
aoqi@0	73	*/
aoqi@0	74	IGNORE(false);
aoqi@0	75
aoqi@0	76	boolean value;
aoqi@0	77
aoqi@0	78	Result(boolean value) {
aoqi@0	79	this.value = value;
aoqi@0	80	}
aoqi@0	81	}
aoqi@0	82
aoqi@0	83	static final Result T = Result.OK;
aoqi@0	84	static final Result F = Result.FAIL;
aoqi@0	85	static final Result I = Result.IGNORE;
aoqi@0	86
aoqi@0	87	/*is a type in 'rows' a valid instantiation for the generic class in 'col' ? */
aoqi@0	88	Result[][] isValidInstantiation = {
aoqi@0	89	//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<?>>
aoqi@0	90	/*Foo<Object>*/ { T , T , F , F , F , F , F },
aoqi@0	91	/*Foo<Number>*/ { T , T , T , F , F , F , F },
aoqi@0	92	/*Foo<Integer>*/ { T , T , T , F , F , F , F },
aoqi@0	93	/*Foo<Double>*/ { T , T , T , F , F , F , F },
aoqi@0	94	/*Foo<String>*/ { T , T , F , F , F , F , F },
aoqi@0	95	/*Foo<X1>*/ { T , T , F , F , F , F , F },
aoqi@0	96	/*Foo<X2>*/ { T , T , T , F , F , F , F },
aoqi@0	97	/*Foo<X3>*/ { T , T , T , F , F , F , F },
aoqi@0	98	/*Foo<X4>*/ { T , T , T , F , F , F , F },
aoqi@0	99	/*Foo<X5>*/ { T , T , F , F , F , F , F },
aoqi@0	100	/*Foo<X6>*/ { T , T , F , T , T , T , T },
aoqi@0	101	/*Foo<+Object>*/ { T , T , I , I , I , I , I },
aoqi@0	102	/*Foo<+Number>*/ { T , T , T , F , F , F , F },
aoqi@0	103	/*Foo<+Integer>*/{ T , T , T , F , F , F , F },
aoqi@0	104	/*Foo<+Double>*/ { T , T , T , F , F , F , F },
aoqi@0	105	/*Foo<+String>*/ { T , T , F , F , F , F , F },
aoqi@0	106	/*Foo<+X1>*/ { T , T , F , F , F , F , F },
aoqi@0	107	/*Foo<+X2>*/ { T , T , T , F , F , F , F },
aoqi@0	108	/*Foo<+X3>*/ { T , T , T , F , F , F , F },
aoqi@0	109	/*Foo<+X4>*/ { T , T , T , F , F , F , F },
aoqi@0	110	/*Foo<+X5>*/ { T , T , F , F , F , F , F },
aoqi@0	111	/*Foo<+X6>*/ { T , T , F , T , T , I , T },
aoqi@0	112	/*Foo<-Object>*/ { T , T , F , F , F , F , F },
aoqi@0	113	/*Foo<-Number>*/ { T , T , T , F , F , F , F },
aoqi@0	114	/*Foo<-Integer>*/{ T , T , T , F , F , F , F },
aoqi@0	115	/*Foo<-Double>*/ { T , T , T , F , F , F , F },
aoqi@0	116	/*Foo<-String>*/ { T , T , F , F , F , F , F },
aoqi@0	117	/*Foo<-X1>*/ { T , T , I , I , I , I , I },
aoqi@0	118	/*Foo<-X2>*/ { T , T , I , F , F , F , F },
aoqi@0	119	/*Foo<-X3>*/ { T , T , I , F , F , F , F },
aoqi@0	120	/*Foo<-X4>*/ { T , T , I , F , F , F , F },
aoqi@0	121	/*Foo<-X5>*/ { T , T , I , F , F , F , F },
aoqi@0	122	/*Foo<-X6>*/ { T , T , F , T , I , I , T },
aoqi@0	123	/*Foo<?>*/ { T , T , T , T , T , T , T }};
aoqi@0	124
aoqi@0	125	GenericTypeWellFormednessTest() {
aoqi@0	126	InstantiableType[] basicTypes = {
aoqi@0	127	new InstantiableType(predef.objectType),
aoqi@0	128	new InstantiableType(NumberType()),
aoqi@0	129	new InstantiableType(box(predef.intType)),
aoqi@0	130	new InstantiableType(box(predef.doubleType)),
aoqi@0	131	new InstantiableType(predef.stringType) };
aoqi@0	132
aoqi@0	133	InstantiableType[] typeVars = new InstantiableType[basicTypes.length + 1];
aoqi@0	134	for (int i = 0 ; i < basicTypes.length ; i++) {
aoqi@0	135	typeVars[i] = new InstantiableType(fac.TypeVariable(basicTypes[i].type));
aoqi@0	136	}
aoqi@0	137	typeVars[typeVars.length - 1] = new InstantiableType(null) {
aoqi@0	138	Type inst(Type clazz) {
aoqi@0	139	TypeVar tvar = fac.TypeVariable();
aoqi@0	140	tvar.bound = subst(clazz, Mapping(clazz.getTypeArguments().head, tvar));
aoqi@0	141	return tvar;
aoqi@0	142	}
aoqi@0	143	};
aoqi@0	144
aoqi@0	145	InstantiableType[] typeArgs = join(InstantiableType.class, basicTypes, typeVars);
aoqi@0	146
aoqi@0	147	InstantiableType[] invariantTypes = new InstantiableType[typeArgs.length];
aoqi@0	148	for (int i = 0 ; i < typeArgs.length ; i++) {
aoqi@0	149	final InstantiableType type1 = typeArgs[i];
aoqi@0	150	invariantTypes[i] = new InstantiableType(typeArgs[i].type) {
aoqi@0	151	Type inst(Type clazz) {
aoqi@0	152	return subst(clazz, Mapping(clazz.getTypeArguments().head, type1.inst(clazz)));
aoqi@0	153	}
aoqi@0	154	};
aoqi@0	155	}
aoqi@0	156
aoqi@0	157	InstantiableType[] covariantTypes = new InstantiableType[typeArgs.length];
aoqi@0	158	for (int i = 0 ; i < typeArgs.length ; i++) {
aoqi@0	159	final InstantiableType type1 = typeArgs[i];
aoqi@0	160	covariantTypes[i] = new InstantiableType(null) {
aoqi@0	161	Type inst(Type clazz) {
aoqi@0	162	Type t = fac.Wildcard(BoundKind.EXTENDS, type1.inst(clazz));
aoqi@0	163	return subst(clazz, Mapping(clazz.getTypeArguments().head, t));
aoqi@0	164	}
aoqi@0	165	};
aoqi@0	166	}
aoqi@0	167
aoqi@0	168	InstantiableType[] contravariantTypes = new InstantiableType[typeArgs.length];
aoqi@0	169	for (int i = 0 ; i < typeArgs.length ; i++) {
aoqi@0	170	final InstantiableType type1 = typeArgs[i];
aoqi@0	171	contravariantTypes[i] = new InstantiableType(null) {
aoqi@0	172	Type inst(Type clazz) {
aoqi@0	173	Type t = fac.Wildcard(BoundKind.SUPER, type1.inst(clazz));
aoqi@0	174	return subst(clazz, Mapping(clazz.getTypeArguments().head, t));
aoqi@0	175	}
aoqi@0	176	};
aoqi@0	177	}
aoqi@0	178
aoqi@0	179	InstantiableType[] bivariantTypes = {
aoqi@0	180	new InstantiableType(fac.Wildcard(BoundKind.UNBOUND, predef.objectType)) {
aoqi@0	181	Type inst(Type clazz) {
aoqi@0	182	return subst(clazz, Mapping(clazz.getTypeArguments().head, type));
aoqi@0	183	}
aoqi@0	184	}
aoqi@0	185	};
aoqi@0	186
aoqi@0	187	rows = join(InstantiableType.class, invariantTypes, covariantTypes, contravariantTypes, bivariantTypes);
aoqi@0	188
aoqi@0	189	Type tv1 = fac.TypeVariable();
aoqi@0	190	Type decl1 = fac.Class(tv1);
aoqi@0	191
aoqi@0	192	Type tv2 = fac.TypeVariable(predef.objectType);
aoqi@0	193	Type decl2 = fac.Class(tv2);
aoqi@0	194
aoqi@0	195	Type tv3 = fac.TypeVariable(NumberType());
aoqi@0	196	Type decl3 = fac.Class(tv3);
aoqi@0	197
aoqi@0	198	TypeVar tv4 = fac.TypeVariable();
aoqi@0	199	Type decl4 = fac.Class(tv4);
aoqi@0	200	tv4.bound = decl4;
aoqi@0	201	tv4.tsym.name = predef.exceptionType.tsym.name;
aoqi@0	202
aoqi@0	203	TypeVar tv5 = fac.TypeVariable();
aoqi@0	204	Type decl5 = fac.Class(tv5);
aoqi@0	205	tv5.bound = subst(decl5, Mapping(tv5, fac.Wildcard(BoundKind.EXTENDS, tv5)));
aoqi@0	206
aoqi@0	207	TypeVar tv6 = fac.TypeVariable();
aoqi@0	208	Type decl6 = fac.Class(tv6);
aoqi@0	209	tv6.bound = subst(decl6, Mapping(tv6, fac.Wildcard(BoundKind.SUPER, tv6)));
aoqi@0	210
aoqi@0	211	TypeVar tv7 = fac.TypeVariable();
aoqi@0	212	Type decl7 = fac.Class(tv7);
aoqi@0	213	tv7.bound = subst(decl7, Mapping(tv7, fac.Wildcard(BoundKind.UNBOUND, predef.objectType)));
aoqi@0	214
aoqi@0	215	columns = new Type[] {
aoqi@0	216	decl1, decl2, decl3, decl4, decl5, decl6, decl7
aoqi@0	217	};
aoqi@0	218	}
aoqi@0	219
aoqi@0	220	void test() {
aoqi@0	221	for (int i = 0; i < rows.length ; i++) {
aoqi@0	222	for (int j = 0; j < columns.length ; j++) {
aoqi@0	223	Type decl = columns[j];
aoqi@0	224	Type inst = rows[i].inst(decl);
aoqi@0	225	if (isValidInstantiation[i][j] != Result.IGNORE) {
aoqi@0	226	executedCount++;
aoqi@0	227	assertValidGenericType(inst, isValidInstantiation[i][j].value);
aoqi@0	228	} else {
aoqi@0	229	ignoredCount++;
aoqi@0	230	}
aoqi@0	231	}
aoqi@0	232	}
aoqi@0	233	}
aoqi@0	234
aoqi@0	235	Type NumberType() {
aoqi@0	236	Symbol s = box(predef.intType).tsym;
aoqi@0	237	s.complete();
aoqi@0	238	return ((ClassType)s.type).supertype_field;
aoqi@0	239	}
aoqi@0	240
aoqi@0	241	@SuppressWarnings("unchecked")
aoqi@0	242	<T> T[] join(Class<T> type, T[]... args) {
aoqi@0	243	int totalLength = 0;
aoqi@0	244	for (T[] arr : args) {
aoqi@0	245	totalLength += arr.length;
aoqi@0	246	}
aoqi@0	247	T[] new_arr = (T[])Array.newInstance(type, totalLength);
aoqi@0	248	int idx = 0;
aoqi@0	249	for (T[] arr : args) {
aoqi@0	250	System.arraycopy(arr, 0, new_arr, idx, arr.length);
aoqi@0	251	idx += arr.length;
aoqi@0	252	}
aoqi@0	253	return new_arr;
aoqi@0	254	}
aoqi@0	255
aoqi@0	256	public static void main(String[] args) {
aoqi@0	257	new GenericTypeWellFormednessTest().test();
aoqi@0	258	System.out.println("Executed checks : " + executedCount);
aoqi@0	259	System.out.println("Ignored checks : " + ignoredCount);
aoqi@0	260	}
aoqi@0	261	}