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comparison: test/tools/javac/generics/rawOverride/7062745/GenericOverrideTest.java

test/tools/javac/generics/rawOverride/7062745/GenericOverrideTest.java

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1 /*
2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /*
25 * @test
26 * @bug 7062745 8006694
27 * @summary Regression: difference in overload resolution when two methods
28 * are maximally specific
29 * temporarily workaround combo tests are causing time out in several platforms
30 * @library ../../../lib
31 * @build JavacTestingAbstractThreadedTest
32 * @run main/othervm GenericOverrideTest
33 */
34
35 // use /othervm to avoid jtreg timeout issues (CODETOOLS-7900047)
36 // see JDK-8006746
37
38 import java.net.URI;
39 import java.util.Arrays;
40 import javax.tools.Diagnostic;
41 import javax.tools.JavaFileObject;
42 import javax.tools.SimpleJavaFileObject;
43 import com.sun.source.util.JavacTask;
44
45 public class GenericOverrideTest
46 extends JavacTestingAbstractThreadedTest
47 implements Runnable {
48
49 enum SourceLevel {
50 SOURCE_7("-source", "7"),
51 SOURCE_DEFAULT();
52
53 String[] opts;
54
55 SourceLevel(String... opts) {
56 this.opts = opts;
57 }
58 }
59
60 enum SignatureKind {
61 NON_GENERIC(""),
62 GENERIC("<X>");
63
64 String paramStr;
65
66 private SignatureKind(String paramStr) {
67 this.paramStr = paramStr;
68 }
69 }
70
71 enum ReturnTypeKind {
72 LIST("List"),
73 ARRAYLIST("ArrayList");
74
75 String retStr;
76
77 private ReturnTypeKind(String retStr) {
78 this.retStr = retStr;
79 }
80
81 boolean moreSpecificThan(ReturnTypeKind that) {
82 switch (this) {
83 case LIST:
84 return that == this;
85 case ARRAYLIST:
86 return that == LIST || that == ARRAYLIST;
87 default: throw new AssertionError("Unexpected ret kind: " + this);
88 }
89 }
90 }
91
92 enum TypeArgumentKind {
93 NONE(""),
94 UNBOUND("<?>"),
95 INTEGER("<Number>"),
96 NUMBER("<Integer>"),
97 TYPEVAR("<X>");
98
99 String typeargStr;
100
101 private TypeArgumentKind(String typeargStr) {
102 this.typeargStr = typeargStr;
103 }
104
105 boolean compatibleWith(SignatureKind sig) {
106 switch (this) {
107 case TYPEVAR: return sig != SignatureKind.NON_GENERIC;
108 default: return true;
109 }
110 }
111
112 boolean moreSpecificThan(TypeArgumentKind that, boolean strict) {
113 switch (this) {
114 case NONE:
115 return that == this || !strict;
116 case UNBOUND:
117 return that == this || that == NONE;
118 case INTEGER:
119 case NUMBER:
120 case TYPEVAR:
121 return that == this || that == NONE || that == UNBOUND;
122 default: throw new AssertionError("Unexpected typearg kind: " + this);
123 }
124 }
125
126 boolean assignableTo(TypeArgumentKind that, SignatureKind sig, SourceLevel level) {
127 switch (this) {
128 case NONE:
129 //this case needs to workaround to javac's impl of 15.12.2.8 being too strict
130 //ideally should be just 'return true' (see 7067746/8015505)
131 return level == SourceLevel.SOURCE_DEFAULT ||
132 sig == SignatureKind.NON_GENERIC || that == NONE;
133 case UNBOUND:
134 return that == this || that == NONE;
135 case INTEGER:
136 case NUMBER:
137 return that == this || that == NONE || that == UNBOUND;
138 case TYPEVAR:
139 return true;
140 default: throw new AssertionError("Unexpected typearg kind: " + this);
141 }
142 }
143 }
144
145 public static void main(String... args) throws Exception {
146 for (SignatureKind sig1 : SignatureKind.values()) {
147 for (ReturnTypeKind rt1 : ReturnTypeKind.values()) {
148 for (TypeArgumentKind ta1 : TypeArgumentKind.values()) {
149 if (!ta1.compatibleWith(sig1)) continue;
150 for (SignatureKind sig2 : SignatureKind.values()) {
151 for (ReturnTypeKind rt2 : ReturnTypeKind.values()) {
152 for (TypeArgumentKind ta2 : TypeArgumentKind.values()) {
153 if (!ta2.compatibleWith(sig2)) continue;
154 for (ReturnTypeKind rt3 : ReturnTypeKind.values()) {
155 for (TypeArgumentKind ta3 : TypeArgumentKind.values()) {
156 if (!ta3.compatibleWith(SignatureKind.NON_GENERIC))
157 continue;
158 for (SourceLevel level : SourceLevel.values()) {
159 pool.execute(
160 new GenericOverrideTest(sig1,
161 rt1, ta1, sig2, rt2,
162 ta2, rt3, ta3, level));
163 }
164 }
165 }
166 }
167 }
168 }
169 }
170 }
171 }
172
173 checkAfterExec();
174 }
175
176 SignatureKind sig1, sig2;
177 ReturnTypeKind rt1, rt2, rt3;
178 TypeArgumentKind ta1, ta2, ta3;
179 SourceLevel level;
180 JavaSource source;
181 DiagnosticChecker diagChecker;
182
183 GenericOverrideTest(SignatureKind sig1, ReturnTypeKind rt1, TypeArgumentKind ta1,
184 SignatureKind sig2, ReturnTypeKind rt2, TypeArgumentKind ta2,
185 ReturnTypeKind rt3, TypeArgumentKind ta3, SourceLevel level) {
186 this.sig1 = sig1;
187 this.sig2 = sig2;
188 this.rt1 = rt1;
189 this.rt2 = rt2;
190 this.rt3 = rt3;
191 this.ta1 = ta1;
192 this.ta2 = ta2;
193 this.ta3 = ta3;
194 this.level = level;
195 this.source = new JavaSource();
196 this.diagChecker = new DiagnosticChecker();
197 }
198
199 class JavaSource extends SimpleJavaFileObject {
200
201 String template = "import java.util.*;\n" +
202 "interface A { #S1 #R1#TA1 m(); }\n" +
203 "interface B { #S2 #R2#TA2 m(); }\n" +
204 "interface AB extends A, B {}\n" +
205 "class Test {\n" +
206 " void test(AB ab) { #R3#TA3 n = ab.m(); }\n" +
207 "}";
208
209 String source;
210
211 public JavaSource() {
212 super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
213 source = template.replace("#S1", sig1.paramStr).
214 replace("#S2", sig2.paramStr).
215 replace("#R1", rt1.retStr).
216 replace("#R2", rt2.retStr).
217 replace("#R3", rt3.retStr).
218 replace("#TA1", ta1.typeargStr).
219 replace("#TA2", ta2.typeargStr).
220 replace("#TA3", ta3.typeargStr);
221 }
222
223 @Override
224 public CharSequence getCharContent(boolean ignoreEncodingErrors) {
225 return source;
226 }
227 }
228
229 @Override
230 public void run() {
231 JavacTask ct = (JavacTask)comp.getTask(null, fm.get(), diagChecker,
232 level.opts != null ? Arrays.asList(level.opts) : null,
233 null, Arrays.asList(source));
234 try {
235 ct.analyze();
236 } catch (Throwable ex) {
237 throw new AssertionError("Error thrown when compiling the following code:\n" +
238 source.getCharContent(true));
239 }
240 check();
241 }
242
243 void check() {
244 checkCount.incrementAndGet();
245
246 boolean errorExpected = false;
247 int mostSpecific = 0;
248
249 //first check that either |R1| <: |R2| or |R2| <: |R1|
250 if (rt1 != rt2) {
251 if (!rt1.moreSpecificThan(rt2) &&
252 !rt2.moreSpecificThan(rt1)) {
253 errorExpected = true;
254 } else {
255 mostSpecific = rt1.moreSpecificThan(rt2) ? 1 : 2;
256 }
257 }
258
259 //check that either TA1 <= TA2 or TA2 <= TA1 (unless most specific return found above is raw)
260 if (!errorExpected) {
261 if (ta1 != ta2) {
262 boolean useStrictCheck = ta1.moreSpecificThan(ta2, true) ||
263 ta2.moreSpecificThan(ta1, true);
264 if (!ta1.moreSpecificThan(ta2, useStrictCheck) &&
265 !ta2.moreSpecificThan(ta1, useStrictCheck)) {
266 errorExpected = true;
267 } else {
268 int mostSpecific2 = ta1.moreSpecificThan(ta2, useStrictCheck) ? 1 : 2;
269 if (mostSpecific != 0 && mostSpecific2 != mostSpecific) {
270 errorExpected = mostSpecific == 1 ?
271 ta1 != TypeArgumentKind.NONE :
272 ta2 != TypeArgumentKind.NONE;
273 } else {
274 mostSpecific = mostSpecific2;
275 }
276 }
277 } else if (mostSpecific == 0) {
278 //when no signature is better than the other, an arbitrary choice
279 //must be made - javac always picks the second signature
280 mostSpecific = 2;
281 }
282 }
283
284 //finally, check that most specific return type is compatible with expected type
285 if (!errorExpected) {
286 ReturnTypeKind msrt = mostSpecific == 1 ? rt1 : rt2;
287 TypeArgumentKind msta = mostSpecific == 1 ? ta1 : ta2;
288 SignatureKind mssig = mostSpecific == 1 ? sig1 : sig2;
289
290 if (!msrt.moreSpecificThan(rt3) ||
291 !msta.assignableTo(ta3, mssig, level)) {
292 errorExpected = true;
293 }
294 }
295
296 if (errorExpected != diagChecker.errorFound) {
297 throw new Error("invalid diagnostics for source:\n" +
298 source.getCharContent(true) +
299 "\nFound error: " + diagChecker.errorFound +
300 "\nExpected error: " + errorExpected);
301 }
302 }
303
304 static class DiagnosticChecker
305 implements javax.tools.DiagnosticListener<JavaFileObject> {
306
307 boolean errorFound;
308
309 public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
310 if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
311 errorFound = true;
312 }
313 }
314 }
315
316 }

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