jdk8-mips64-public/langtools: test/tools/javac/generics/rawOverride/7062745/GenericOverrideTest.java@116f68a5e677 (annotated)

test/tools/javac/generics/rawOverride/7062745/GenericOverrideTest.java@116f68a5e677 (annotated)

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

Fri, 23 Dec 2011 22:30:33 +0000

author: jjg
date: Fri, 23 Dec 2011 22:30:33 +0000
changeset 1169: 116f68a5e677
parent 1059: 0b5beb9562c6
child 1482: 954541f13717
permissions: -rw-r--r--

7124605: typos in javac comments
Reviewed-by: ksrini

 /*
  * Copyright (c) 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 7062745
  * @summary  Regression: difference in overload resolution when two methods are maximally specific
  */
 import com.sun.source.util.JavacTask;
 import java.net.URI;
 import java.util.Arrays;
 import javax.tools.Diagnostic;
 import javax.tools.JavaCompiler;
 import javax.tools.JavaFileObject;
 import javax.tools.SimpleJavaFileObject;
 import javax.tools.StandardJavaFileManager;
 import javax.tools.ToolProvider;
 public class GenericOverrideTest {
     static int checkCount = 0;
     enum SignatureKind {
         NON_GENERIC(""),
         GENERIC("<X>");
         String paramStr;
         private SignatureKind(String paramStr) {
             this.paramStr = paramStr;
         }
     }
     enum ReturnTypeKind {
         LIST("List"),
         ARRAYLIST("ArrayList");
         String retStr;
         private ReturnTypeKind(String retStr) {
             this.retStr = retStr;
         }
         boolean moreSpecificThan(ReturnTypeKind that) {
             switch (this) {
                 case LIST:
                     return that == this;
                 case ARRAYLIST:
                     return that == LIST || that == ARRAYLIST;
                 default: throw new AssertionError("Unexpected ret kind: " + this);
             }
         }
     }
     enum TypeArgumentKind {
         NONE(""),
         UNBOUND("<?>"),
         INTEGER("<Number>"),
         NUMBER("<Integer>"),
         TYPEVAR("<X>");
         String typeargStr;
         private TypeArgumentKind(String typeargStr) {
             this.typeargStr = typeargStr;
         }
         boolean compatibleWith(SignatureKind sig) {
             switch (this) {
                 case TYPEVAR: return sig != SignatureKind.NON_GENERIC;
                 default: return true;
             }
         }
         boolean moreSpecificThan(TypeArgumentKind that, boolean strict) {
             switch (this) {
                 case NONE:
                     return that == this || !strict;
                 case UNBOUND:
                     return that == this || that == NONE;
                 case INTEGER:
                 case NUMBER:
                 case TYPEVAR:
                     return that == this || that == NONE || that == UNBOUND;
                 default: throw new AssertionError("Unexpected typearg kind: " + this);
             }
         }
         boolean assignableTo(TypeArgumentKind that, SignatureKind sig) {
             switch (this) {
                 case NONE:
                     //this case needs to workaround to javac's impl of 15.12.2.8 being too strict
                     //ideally should be just 'return true' (see 7067746)
                     return sig == SignatureKind.NON_GENERIC || that == NONE;
                 case UNBOUND:
                     return that == this || that == NONE;
                 case INTEGER:
                 case NUMBER:
                     return that == this || that == NONE || that == UNBOUND;
                 case TYPEVAR:
                     return true;
                 default: throw new AssertionError("Unexpected typearg kind: " + this);
             }
         }
     }
     public static void main(String... args) throws Exception {
         //create default shared JavaCompiler - reused across multiple compilations
         JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
         StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null);
         for (SignatureKind sig1 : SignatureKind.values()) {
             for (ReturnTypeKind rt1 : ReturnTypeKind.values()) {
                 for (TypeArgumentKind ta1 : TypeArgumentKind.values()) {
                     if (!ta1.compatibleWith(sig1)) continue;
                     for (SignatureKind sig2 : SignatureKind.values()) {
                         for (ReturnTypeKind rt2 : ReturnTypeKind.values()) {
                             for (TypeArgumentKind ta2 : TypeArgumentKind.values()) {
                                 if (!ta2.compatibleWith(sig2)) continue;
                                 for (ReturnTypeKind rt3 : ReturnTypeKind.values()) {
                                     for (TypeArgumentKind ta3 : TypeArgumentKind.values()) {
                                         if (!ta3.compatibleWith(SignatureKind.NON_GENERIC)) continue;
                                         new GenericOverrideTest(sig1, rt1, ta1, sig2, rt2, ta2, rt3, ta3).run(comp, fm);
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }
         System.out.println("Total check executed: " + checkCount);
     }
     SignatureKind sig1, sig2;
     ReturnTypeKind rt1, rt2, rt3;
     TypeArgumentKind ta1, ta2, ta3;
     JavaSource source;
     DiagnosticChecker diagChecker;
     GenericOverrideTest(SignatureKind sig1, ReturnTypeKind rt1, TypeArgumentKind ta1,
             SignatureKind sig2, ReturnTypeKind rt2, TypeArgumentKind ta2, ReturnTypeKind rt3, TypeArgumentKind ta3) {
         this.sig1 = sig1;
         this.sig2 = sig2;
         this.rt1 = rt1;
         this.rt2 = rt2;
         this.rt3 = rt3;
         this.ta1 = ta1;
         this.ta2 = ta2;
         this.ta3 = ta3;
         this.source = new JavaSource();
         this.diagChecker = new DiagnosticChecker();
     }
     class JavaSource extends SimpleJavaFileObject {
         String template = "import java.util.*;\n" +
                           "interface A { #S1 #R1#TA1 m(); }\n" +
                           "interface B { #S2 #R2#TA2 m(); }\n" +
                           "interface AB extends A, B {}\n" +
                           "class Test {\n" +
                           "  void test(AB ab) { #R3#TA3 n = ab.m(); }\n" +
                           "}";
         String source;
         public JavaSource() {
             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
             source = template.replace("#S1", sig1.paramStr).
                     replace("#S2", sig2.paramStr).
                     replace("#R1", rt1.retStr).
                     replace("#R2", rt2.retStr).
                     replace("#R3", rt3.retStr).
                     replace("#TA1", ta1.typeargStr).
                     replace("#TA2", ta2.typeargStr).
                     replace("#TA3", ta3.typeargStr);
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return source;
         }
     }
     void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {
         JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,
                 null, null, Arrays.asList(source));
         try {
             ct.analyze();
         } catch (Throwable ex) {
             throw new AssertionError("Error thrown when compiling the following code:\n" + source.getCharContent(true));
         }
         check();
     }
     void check() {
         checkCount++;
         boolean errorExpected = false;
         int mostSpecific = 0;
         //first check that either |R1| <: |R2| or |R2| <: |R1|
         if (rt1 != rt2) {
             if (!rt1.moreSpecificThan(rt2) &&
                     !rt2.moreSpecificThan(rt1)) {
                 errorExpected = true;
             } else {
                 mostSpecific = rt1.moreSpecificThan(rt2) ? 1 : 2;
             }
         }
         //check that either TA1 <= TA2 or TA2 <= TA1 (unless most specific return found above is raw)
         if (!errorExpected) {
             if (ta1 != ta2) {
                 boolean useStrictCheck = ta1.moreSpecificThan(ta2, true) || ta2.moreSpecificThan(ta1, true);
                 if (!ta1.moreSpecificThan(ta2, useStrictCheck) &&
                         !ta2.moreSpecificThan(ta1, useStrictCheck)) {
                     errorExpected = true;
                 } else {
                     int mostSpecific2 = ta1.moreSpecificThan(ta2, useStrictCheck) ? 1 : 2;
                     if (mostSpecific != 0 && mostSpecific2 != mostSpecific) {
                         errorExpected = mostSpecific == 1 ? ta1 != TypeArgumentKind.NONE : ta2 != TypeArgumentKind.NONE;
                     } else {
                         mostSpecific = mostSpecific2;
                     }
                 }
             } else if (mostSpecific == 0) {
                 //when no signature is better than the other, an arbitrary choice
                 //must be made - javac always picks the second signature
                 mostSpecific = 2;
             }
         }
         //finally, check that most specific return type is compatible with expected type
         if (!errorExpected) {
             ReturnTypeKind msrt = mostSpecific == 1 ? rt1 : rt2;
             TypeArgumentKind msta = mostSpecific == 1 ? ta1 : ta2;
             SignatureKind mssig = mostSpecific == 1 ? sig1 : sig2;
             if (!msrt.moreSpecificThan(rt3) ||
                     !msta.assignableTo(ta3, mssig)) {
                 errorExpected = true;
             }
         }
         if (errorExpected != diagChecker.errorFound) {
             throw new Error("invalid diagnostics for source:\n" +
                 source.getCharContent(true) +
                 "\nFound error: " + diagChecker.errorFound +
                 "\nExpected error: " + errorExpected);
         }
     }
     static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {
         boolean errorFound;
         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
                 errorFound = true;
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/generics/rawOverride/7062745/GenericOverrideTest.java@116f68a5e677 (annotated)

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