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

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

test/tools/javac/lambda/MethodReferenceParserTest.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 1774: 37295244f534
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) 2011, 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 7115052
  * @bug 8003280 8006694
  * @summary Add lambda tests
  *  Add parser support for method references
  *  temporarily workaround combo tests are causing time out in several platforms
  * @library ../lib
  * @build JavacTestingAbstractThreadedTest
  * @run main/othervm MethodReferenceParserTest
  */
 // use /othervm to avoid jtreg timeout issues (CODETOOLS-7900047)
 // see JDK-8006746
 import java.net.URI;
 import java.util.Arrays;
 import javax.tools.Diagnostic;
 import javax.tools.JavaFileObject;
 import javax.tools.SimpleJavaFileObject;
 import com.sun.source.util.JavacTask;
 public class MethodReferenceParserTest
     extends JavacTestingAbstractThreadedTest
     implements Runnable {
     enum ReferenceKind {
         METHOD_REF("#Q::#Gm"),
         CONSTRUCTOR_REF("#Q::#Gnew"),
         FALSE_REF("min < max"),
         ERR_SUPER("#Q::#Gsuper"),
         ERR_METH0("#Q::#Gm()"),
         ERR_METH1("#Q::#Gm(X)"),
         ERR_CONSTR0("#Q::#Gnew()"),
         ERR_CONSTR1("#Q::#Gnew(X)");
         String referenceTemplate;
         ReferenceKind(String referenceTemplate) {
             this.referenceTemplate = referenceTemplate;
         }
         String getReferenceString(QualifierKind qk, GenericKind gk) {
             return referenceTemplate
                     .replaceAll("#Q", qk.qualifier)
                     .replaceAll("#G", gk.typeParameters);
         }
         boolean erroneous() {
             switch (this) {
                 case ERR_SUPER:
                 case ERR_METH0:
                 case ERR_METH1:
                 case ERR_CONSTR0:
                 case ERR_CONSTR1:
                     return true;
                 default: return false;
             }
         }
     }
     enum ContextKind {
         ASSIGN("SAM s = #E;"),
         METHOD("m(#E, i);");
         String contextTemplate;
         ContextKind(String contextTemplate) {
             this.contextTemplate = contextTemplate;
         }
         String contextString(ExprKind ek, ReferenceKind rk, QualifierKind qk,
                 GenericKind gk, SubExprKind sk) {
             return contextTemplate.replaceAll("#E", ek.expressionString(rk, qk, gk, sk));
         }
     }
     enum GenericKind {
         NONE(""),
         ONE("<X>"),
         TWO("<X,Y>");
         String typeParameters;
         GenericKind(String typeParameters) {
             this.typeParameters = typeParameters;
         }
     }
     enum QualifierKind {
         THIS("this"),
         SUPER("super"),
         NEW("new Foo()"),
         METHOD("m()"),
         FIELD("a.f"),
         UBOUND_SIMPLE("A"),
         UNBOUND_ARRAY1("int[]"),
         UNBOUND_ARRAY2("A<G>[][]"),
         UNBOUND_GENERIC1("A<X>"),
         UNBOUND_GENERIC2("A<X, Y>"),
         UNBOUND_GENERIC3("A<? extends X, ? super Y>"),
         UNBOUND_GENERIC4("A<int[], short[][]>"),
         NESTED_GENERIC1("A<A<X,Y>, A<X,Y>>"),
         NESTED_GENERIC2("A<A<A<X,Y>,A<X,Y>>, A<A<X,Y>,A<X,Y>>>");
         String qualifier;
         QualifierKind(String qualifier) {
             this.qualifier = qualifier;
         }
     }
     enum ExprKind {
         NONE("#R::S"),
         SINGLE_PAREN1("(#R#S)"),
         SINGLE_PAREN2("(#R)#S"),
         DOUBLE_PAREN1("((#R#S))"),
         DOUBLE_PAREN2("((#R)#S)"),
         DOUBLE_PAREN3("((#R))#S");
         String expressionTemplate;
         ExprKind(String expressionTemplate) {
             this.expressionTemplate = expressionTemplate;
         }
         String expressionString(ReferenceKind rk, QualifierKind qk, GenericKind gk, SubExprKind sk) {
             return expressionTemplate
                     .replaceAll("#R", rk.getReferenceString(qk, gk))
                     .replaceAll("#S", sk.subExpression);
         }
     }
     enum SubExprKind {
         NONE(""),
         SELECT_FIELD(".f"),
         SELECT_METHOD(".f()"),
         SELECT_NEW(".new Foo()"),
         POSTINC("++"),
         POSTDEC("--");
         String subExpression;
         SubExprKind(String subExpression) {
             this.subExpression = subExpression;
         }
     }
     public static void main(String... args) throws Exception {
         for (ReferenceKind rk : ReferenceKind.values()) {
             for (QualifierKind qk : QualifierKind.values()) {
                 for (GenericKind gk : GenericKind.values()) {
                     for (SubExprKind sk : SubExprKind.values()) {
                         for (ExprKind ek : ExprKind.values()) {
                             for (ContextKind ck : ContextKind.values()) {
                                 pool.execute(new MethodReferenceParserTest(rk, qk, gk, sk, ek, ck));
                             }
                         }
                     }
                 }
             }
         }
         checkAfterExec();
     }
     ReferenceKind rk;
     QualifierKind qk;
     GenericKind gk;
     SubExprKind sk;
     ExprKind ek;
     ContextKind ck;
     JavaSource source;
     DiagnosticChecker diagChecker;
     MethodReferenceParserTest(ReferenceKind rk, QualifierKind qk, GenericKind gk, SubExprKind sk, ExprKind ek, ContextKind ck) {
         this.rk = rk;
         this.qk = qk;
         this.gk = gk;
         this.sk = sk;
         this.ek = ek;
         this.ck = ck;
         this.source = new JavaSource();
         this.diagChecker = new DiagnosticChecker();
     }
     class JavaSource extends SimpleJavaFileObject {
         String template = "class Test {\n" +
                           "   void test() {\n" +
                           "      #C\n" +
                           "   }" +
                           "}";
         String source;
         public JavaSource() {
             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
             source = template.replaceAll("#C", ck.contextString(ek, rk, qk, gk, sk));
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return source;
         }
     }
     @Override
     public void run() {
         JavacTask ct = (JavacTask)comp.getTask(null, fm.get(), diagChecker,
                 null, null, Arrays.asList(source));
         try {
             ct.parse();
         } catch (Throwable ex) {
             processException(ex);
             return;
         }
         check();
     }
     void check() {
         checkCount.incrementAndGet();
         if (diagChecker.errorFound != rk.erroneous()) {
             throw new Error("invalid diagnostics for source:\n" +
                 source.getCharContent(true) +
                 "\nFound error: " + diagChecker.errorFound +
                 "\nExpected error: " + rk.erroneous());
         }
     }
     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/lambda/MethodReferenceParserTest.java@c09b7234cded (annotated)

test/tools/javac/lambda/MethodReferenceParserTest.java