0N/A/*
2311N/A * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1472N/A * or visit www.oracle.com if you need additional information or have any
1472N/A * questions.
0N/A */
0N/A
0N/A/*
1879N/A * @test
1879N/A * @bug 7062745
1879N/A * @summary Regression: difference in overload resolution when two methods are maximally specific
1879N/A */
1879N/A
1879N/Aimport com.sun.source.util.JavacTask;
1879N/Aimport java.net.URI;
1879N/Aimport java.util.Arrays;
1879N/Aimport javax.tools.Diagnostic;
1879N/Aimport javax.tools.JavaCompiler;
1879N/Aimport javax.tools.JavaFileObject;
1879N/Aimport javax.tools.SimpleJavaFileObject;
0N/Aimport javax.tools.StandardJavaFileManager;
0N/Aimport javax.tools.ToolProvider;
0N/A
0N/Apublic class GenericOverrideTest {
0N/A
0N/A static int checkCount = 0;
1909N/A
2664N/A enum SignatureKind {
727N/A NON_GENERIC(""),
727N/A GENERIC("<X>");
0N/A
0N/A String paramStr;
0N/A
0N/A private SignatureKind(String paramStr) {
0N/A this.paramStr = paramStr;
0N/A }
0N/A }
0N/A
0N/A enum ReturnTypeKind {
0N/A LIST("List"),
0N/A ARRAYLIST("ArrayList");
0N/A
0N/A String retStr;
0N/A
0N/A private ReturnTypeKind(String retStr) {
0N/A this.retStr = retStr;
0N/A }
0N/A
0N/A boolean moreSpecificThan(ReturnTypeKind that) {
0N/A switch (this) {
0N/A case LIST:
0N/A return that == this;
0N/A case ARRAYLIST:
0N/A return that == LIST || that == ARRAYLIST;
0N/A default: throw new AssertionError("Unexpected ret kind: " + this);
0N/A }
0N/A }
0N/A }
0N/A
0N/A enum TypeArgumentKind {
0N/A NONE(""),
0N/A UNBOUND("<?>"),
0N/A INTEGER("<Number>"),
0N/A NUMBER("<Integer>"),
0N/A TYPEVAR("<X>");
0N/A
0N/A String typeargStr;
727N/A
0N/A private TypeArgumentKind(String typeargStr) {
0N/A this.typeargStr = typeargStr;
0N/A }
0N/A
0N/A boolean compatibleWith(SignatureKind sig) {
0N/A switch (this) {
0N/A case TYPEVAR: return sig != SignatureKind.NON_GENERIC;
0N/A default: return true;
0N/A }
0N/A }
0N/A
0N/A boolean moreSpecificThan(TypeArgumentKind that, boolean strict) {
0N/A switch (this) {
0N/A case NONE:
0N/A return that == this || !strict;
0N/A case UNBOUND:
0N/A return that == this || that == NONE;
0N/A case INTEGER:
0N/A case NUMBER:
0N/A case TYPEVAR:
0N/A return that == this || that == NONE || that == UNBOUND;
0N/A default: throw new AssertionError("Unexpected typearg kind: " + this);
0N/A }
0N/A }
0N/A
0N/A boolean assignableTo(TypeArgumentKind that, SignatureKind sig) {
0N/A switch (this) {
0N/A case NONE:
0N/A //this case needs to workaround to javac's impl of 15.12.2.8 being too strict
0N/A //ideally should be just 'return true' (see 7067746)
0N/A return sig == SignatureKind.NON_GENERIC || that == NONE;
0N/A case UNBOUND:
0N/A return that == this || that == NONE;
0N/A case INTEGER:
0N/A case NUMBER:
0N/A return that == this || that == NONE || that == UNBOUND;
0N/A case TYPEVAR:
0N/A return true;
0N/A default: throw new AssertionError("Unexpected typearg kind: " + this);
0N/A }
0N/A }
0N/A }
0N/A
0N/A public static void main(String... args) throws Exception {
0N/A
0N/A //create default shared JavaCompiler - reused across multiple compilations
0N/A JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
727N/A StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
0N/A
0N/A for (SignatureKind sig1 : SignatureKind.values()) {
0N/A for (ReturnTypeKind rt1 : ReturnTypeKind.values()) {
0N/A for (TypeArgumentKind ta1 : TypeArgumentKind.values()) {
0N/A if (!ta1.compatibleWith(sig1)) continue;
0N/A for (SignatureKind sig2 : SignatureKind.values()) {
0N/A for (ReturnTypeKind rt2 : ReturnTypeKind.values()) {
0N/A for (TypeArgumentKind ta2 : TypeArgumentKind.values()) {
0N/A if (!ta2.compatibleWith(sig2)) continue;
0N/A for (ReturnTypeKind rt3 : ReturnTypeKind.values()) {
2664N/A for (TypeArgumentKind ta3 : TypeArgumentKind.values()) {
0N/A if (!ta3.compatibleWith(SignatureKind.NON_GENERIC)) continue;
0N/A new GenericOverrideTest(sig1, rt1, ta1, sig2, rt2, ta2, rt3, ta3).run(comp, fm);
0N/A }
0N/A }
0N/A }
0N/A }
0N/A }
0N/A }
0N/A }
0N/A }
0N/A System.out.println("Total check executed: " + checkCount);
0N/A }
0N/A
0N/A SignatureKind sig1, sig2;
0N/A ReturnTypeKind rt1, rt2, rt3;
0N/A TypeArgumentKind ta1, ta2, ta3;
0N/A JavaSource source;
0N/A DiagnosticChecker diagChecker;
0N/A
0N/A GenericOverrideTest(SignatureKind sig1, ReturnTypeKind rt1, TypeArgumentKind ta1,
0N/A SignatureKind sig2, ReturnTypeKind rt2, TypeArgumentKind ta2, ReturnTypeKind rt3, TypeArgumentKind ta3) {
0N/A this.sig1 = sig1;
1988N/A this.sig2 = sig2;
0N/A this.rt1 = rt1;
0N/A this.rt2 = rt2;
0N/A this.rt3 = rt3;
2012N/A this.ta1 = ta1;
2012N/A this.ta2 = ta2;
0N/A this.ta3 = ta3;
0N/A this.source = new JavaSource();
0N/A this.diagChecker = new DiagnosticChecker();
0N/A }
2012N/A
0N/A class JavaSource extends SimpleJavaFileObject {
0N/A
0N/A String template = "import java.util.*;\n" +
0N/A "interface A { #S1 #R1#TA1 m(); }\n" +
0N/A "interface B { #S2 #R2#TA2 m(); }\n" +
0N/A "interface AB extends A, B {}\n" +
0N/A "class Test {\n" +
3042N/A " void test(AB ab) { #R3#TA3 n = ab.m(); }\n" +
0N/A "}";
0N/A
0N/A String source;
1909N/A
1909N/A public JavaSource() {
1909N/A super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
1909N/A source = template.replace("#S1", sig1.paramStr).
1909N/A replace("#S2", sig2.paramStr).
1909N/A replace("#R1", rt1.retStr).
1909N/A replace("#R2", rt2.retStr).
1909N/A replace("#R3", rt3.retStr).
1909N/A replace("#TA1", ta1.typeargStr).
1909N/A replace("#TA2", ta2.typeargStr).
1909N/A replace("#TA3", ta3.typeargStr);
1909N/A }
1909N/A
0N/A @Override
0N/A public CharSequence getCharContent(boolean ignoreEncodingErrors) {
0N/A return source;
0N/A }
0N/A }
0N/A
0N/A void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
0N/A JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
0N/A null, null, Arrays.asList(source));
0N/A try {
0N/A ct.analyze();
0N/A } catch (Throwable ex) {
0N/A throw new AssertionError("Error thron when compiling the following code:\n" + source.getCharContent(true));
0N/A }
0N/A check();
0N/A }
1988N/A
0N/A void check() {
0N/A checkCount++;
0N/A
0N/A boolean errorExpected = false;
0N/A int mostSpecific = 0;
0N/A
0N/A //first check that either |R1| <: |R2| or |R2| <: |R1|
0N/A if (rt1 != rt2) {
0N/A if (!rt1.moreSpecificThan(rt2) &&
0N/A !rt2.moreSpecificThan(rt1)) {
0N/A errorExpected = true;
0N/A } else {
0N/A mostSpecific = rt1.moreSpecificThan(rt2) ? 1 : 2;
2664N/A }
0N/A }
0N/A
0N/A //check that either TA1 <= TA2 or TA2 <= TA1 (unless most specific return found above is raw)
0N/A if (!errorExpected) {
0N/A if (ta1 != ta2) {
0N/A boolean useStrictCheck = ta1.moreSpecificThan(ta2, true) || ta2.moreSpecificThan(ta1, true);
0N/A if (!ta1.moreSpecificThan(ta2, useStrictCheck) &&
0N/A !ta2.moreSpecificThan(ta1, useStrictCheck)) {
0N/A errorExpected = true;
0N/A } else {
0N/A int mostSpecific2 = ta1.moreSpecificThan(ta2, useStrictCheck) ? 1 : 2;
0N/A if (mostSpecific != 0 && mostSpecific2 != mostSpecific) {
0N/A errorExpected = mostSpecific == 1 ? ta1 != TypeArgumentKind.NONE : ta2 != TypeArgumentKind.NONE;
0N/A } else {
0N/A mostSpecific = mostSpecific2;
0N/A }
1909N/A }
0N/A } else if (mostSpecific == 0) {
0N/A //when no signature is better than the other, an arbitrary choice
0N/A //must be made - javac always picks the second signature
0N/A mostSpecific = 2;
0N/A }
0N/A }
3042N/A
0N/A //finally, check that most specific return type is compatible with expected type
2664N/A if (!errorExpected) {
0N/A ReturnTypeKind msrt = mostSpecific == 1 ? rt1 : rt2;
2664N/A TypeArgumentKind msta = mostSpecific == 1 ? ta1 : ta2;
0N/A SignatureKind mssig = mostSpecific == 1 ? sig1 : sig2;
0N/A
0N/A if (!msrt.moreSpecificThan(rt3) ||
0N/A !msta.assignableTo(ta3, mssig)) {
0N/A errorExpected = true;
0N/A }
0N/A }
0N/A
0N/A if (errorExpected != diagChecker.errorFound) {
0N/A throw new Error("invalid diagnostics for source:\n" +
0N/A source.getCharContent(true) +
0N/A "\nFound error: " + diagChecker.errorFound +
0N/A "\nExpected error: " + errorExpected);
0N/A }
0N/A }
0N/A
0N/A static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
0N/A
0N/A boolean errorFound;
0N/A
0N/A public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
0N/A if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
0N/A errorFound = true;
0N/A }
0N/A }
0N/A }
0N/A}
0N/A