jdk8-mips64-public/langtools: test/tools/javac/lambda/FunctionalInterfaceConversionTest.java@c09b7234cded (annotated)

test/tools/javac/lambda/FunctionalInterfaceConversionTest.java@c09b7234cded (annotated)

test/tools/javac/lambda/FunctionalInterfaceConversionTest.java

Tue, 14 May 2013 11:11:09 -0700

author: rfield
date: Tue, 14 May 2013 11:11:09 -0700
changeset 1752: c09b7234cded
parent 1520: 5c956be64b9e
child 2354: b33835c5d96a
permissions: -rw-r--r--

8012556: Implement lambda methods on interfaces as static
8006140: Javac NPE compiling Lambda expression on initialization expression of static field in interface
Summary: Lambdas occurring in static contexts or those not needing instance information should be generated into static methods. This has long been the case for classes. However, as a work-around to the lack of support for statics on interfaces, interface lambda methods have been generated into default methods. For lambdas in interface static contexts (fields and static methods) this causes an NPE in javac because there is no 'this'. MethodHandles now support static methods on interfaces. This changeset allows lambda methods to be generated as static interface methods. An existing bug in Hotspot (8013875) is exposed in a test when the "-esa" flag is used. This test and another test that already exposed this bug have been marked with @ignore.
Reviewed-by: mcimadamore

 /*
  * Copyright (c) 2012, 2013, 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 8003280 8004102 8006694
  * @summary Add lambda tests
  *  perform several automated checks in lambda conversion, esp. around accessibility
  *  temporarily workaround combo tests are causing time out in several platforms
  * @author  Maurizio Cimadamore
  * @library ../lib
  * @build JavacTestingAbstractThreadedTest
  * @run main/othervm FunctionalInterfaceConversionTest
  */
 // use /othervm to avoid jtreg timeout issues (CODETOOLS-7900047)
 // see JDK-8006746
 import java.io.IOException;
 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.ToolProvider;
 import com.sun.source.util.JavacTask;
 public class FunctionalInterfaceConversionTest
     extends JavacTestingAbstractThreadedTest
     implements Runnable {
     enum PackageKind {
         NO_PKG(""),
         PKG_A("a");
         String pkg;
         PackageKind(String pkg) {
             this.pkg = pkg;
         }
         String getPkgDecl() {
             return this == NO_PKG ?
                 "" :
                 "package " + pkg + ";";
         }
         String getImportStat() {
             return this == NO_PKG ?
                 "" :
                 "import " + pkg + ".*;";
         }
     }
     enum SamKind {
         CLASS("public class Sam {  }"),
         ABSTACT_CLASS("public abstract class Sam {  }"),
         ANNOTATION("public @interface Sam {  }"),
         ENUM("public enum Sam { }"),
         INTERFACE("public interface Sam { \n #METH; \n }");
         String sam_str;
         SamKind(String sam_str) {
             this.sam_str = sam_str;
         }
         String getSam(String methStr) {
             return sam_str.replaceAll("#METH", methStr);
         }
     }
     enum ModifierKind {
         PUBLIC("public"),
         PACKAGE("");
         String modifier_str;
         ModifierKind(String modifier_str) {
             this.modifier_str = modifier_str;
         }
         boolean stricterThan(ModifierKind that) {
             return this.ordinal() > that.ordinal();
         }
     }
     enum TypeKind {
         EXCEPTION("Exception"),
         PKG_CLASS("PackageClass");
         String typeStr;
         private TypeKind(String typeStr) {
             this.typeStr = typeStr;
         }
     }
     enum ExprKind {
         LAMBDA("x -> null"),
         MREF("this::m");
         String exprStr;
         private ExprKind(String exprStr) {
             this.exprStr = exprStr;
         }
     }
     enum MethodKind {
         NONE(""),
         NON_GENERIC("public abstract #R m(#ARG s) throws #T;"),
         GENERIC("public abstract <X> #R m(#ARG s) throws #T;");
         String methodTemplate;
         private MethodKind(String methodTemplate) {
             this.methodTemplate = methodTemplate;
         }
         String getMethod(TypeKind retType, TypeKind argType, TypeKind thrownType) {
             return methodTemplate.replaceAll("#R", retType.typeStr).
                     replaceAll("#ARG", argType.typeStr).
                     replaceAll("#T", thrownType.typeStr);
         }
     }
     public static void main(String[] args) throws Exception {
         for (PackageKind samPkg : PackageKind.values()) {
             for (ModifierKind modKind : ModifierKind.values()) {
                 for (SamKind samKind : SamKind.values()) {
                     for (MethodKind samMeth : MethodKind.values()) {
                         for (MethodKind clientMeth : MethodKind.values()) {
                             for (TypeKind retType : TypeKind.values()) {
                                 for (TypeKind argType : TypeKind.values()) {
                                     for (TypeKind thrownType : TypeKind.values()) {
                                         for (ExprKind exprKind : ExprKind.values()) {
                                             pool.execute(
                                                 new FunctionalInterfaceConversionTest(
                                                     samPkg, modKind, samKind,
                                                     samMeth, clientMeth, retType,
                                                     argType, thrownType, exprKind));
                                         }
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }
         checkAfterExec(false);
     }
     PackageKind samPkg;
     ModifierKind modKind;
     SamKind samKind;
     MethodKind samMeth;
     MethodKind clientMeth;
     TypeKind retType;
     TypeKind argType;
     TypeKind thrownType;
     ExprKind exprKind;
     DiagnosticChecker dc;
     SourceFile samSourceFile = new SourceFile("Sam.java", "#P \n #C") {
         @Override
         public String toString() {
             return template.replaceAll("#P", samPkg.getPkgDecl()).
                     replaceAll("#C", samKind.getSam(
                     samMeth.getMethod(retType, argType, thrownType)));
         }
     };
     SourceFile pkgClassSourceFile =
             new SourceFile("PackageClass.java",
                            "#P\n #M class PackageClass extends Exception { }") {
         @Override
         public String toString() {
             return template.replaceAll("#P", samPkg.getPkgDecl()).
                     replaceAll("#M", modKind.modifier_str);
         }
     };
     SourceFile clientSourceFile =
             new SourceFile("Client.java",
                            "#I\n abstract class Client { \n" +
                            "  Sam s = #E;\n" +
                            "  #M \n }") {
         @Override
         public String toString() {
             return template.replaceAll("#I", samPkg.getImportStat())
                     .replaceAll("#E", exprKind.exprStr)
                     .replaceAll("#M", clientMeth.getMethod(retType, argType, thrownType));
         }
     };
     FunctionalInterfaceConversionTest(PackageKind samPkg, ModifierKind modKind,
             SamKind samKind, MethodKind samMeth, MethodKind clientMeth,
             TypeKind retType, TypeKind argType, TypeKind thrownType,
             ExprKind exprKind) {
         this.samPkg = samPkg;
         this.modKind = modKind;
         this.samKind = samKind;
         this.samMeth = samMeth;
         this.clientMeth = clientMeth;
         this.retType = retType;
         this.argType = argType;
         this.thrownType = thrownType;
         this.exprKind = exprKind;
         this.dc = new DiagnosticChecker();
     }
     @Override
     public void run() {
         final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
         JavacTask ct = (JavacTask)tool.getTask(null, fm.get(), dc, null, null,
                 Arrays.asList(samSourceFile, pkgClassSourceFile, clientSourceFile));
         try {
             ct.analyze();
         } catch (IOException ex) {
             throw new AssertionError("Test failing with cause", ex.getCause());
         }
         if (dc.errorFound == checkSamConversion()) {
             throw new AssertionError(samSourceFile + "\n\n" +
                 pkgClassSourceFile + "\n\n" + clientSourceFile);
         }
     }
     boolean checkSamConversion() {
         if (samKind != SamKind.INTERFACE) {
             //sam type must be an interface
             return false;
         } else if (samMeth == MethodKind.NONE) {
             //interface must have at least a method
             return false;
         } else if (exprKind == ExprKind.LAMBDA &&
                 samMeth != MethodKind.NON_GENERIC) {
             //target method for lambda must be non-generic
             return false;
         } else if (exprKind == ExprKind.MREF &&
                 clientMeth == MethodKind.NONE) {
             return false;
         } else if (samPkg != PackageKind.NO_PKG &&
                 modKind != ModifierKind.PUBLIC &&
                 (retType == TypeKind.PKG_CLASS ||
                 argType == TypeKind.PKG_CLASS ||
                 thrownType == TypeKind.PKG_CLASS)) {
             //target must not contain inaccessible types
             return false;
         } else {
             return true;
         }
     }
     abstract class SourceFile extends SimpleJavaFileObject {
         protected String template;
         public SourceFile(String filename, String template) {
             super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);
             this.template = template;
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return toString();
         }
         @Override
         public abstract String toString();
     }
     static class DiagnosticChecker
         implements javax.tools.DiagnosticListener<JavaFileObject> {
         boolean errorFound = false;
         @Override
         public void report(Diagnostic<? extends JavaFileObject> diagnostic) {
             if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
                 errorFound = true;
             }
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/FunctionalInterfaceConversionTest.java@c09b7234cded (annotated)

test/tools/javac/lambda/FunctionalInterfaceConversionTest.java