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

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

test/tools/javac/lambda/LambdaParserTest.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 2525: 2eb010b6cb22
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 7115050 8003280 8005852 8006694
  * @summary Add lambda tests
  *  Add parser support for lambda expressions
  *  temporarily workaround combo tests are causing time out in several platforms
  * @library ../lib
  * @build JavacTestingAbstractThreadedTest
  * @run main/othervm LambdaParserTest
  */
 // 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 LambdaParserTest
     extends JavacTestingAbstractThreadedTest
     implements Runnable {
     enum LambdaKind {
         NILARY_EXPR("()->x"),
         NILARY_STMT("()->{ return x; }"),
         ONEARY_SHORT_EXPR("#PN->x"),
         ONEARY_SHORT_STMT("#PN->{ return x; }"),
         ONEARY_EXPR("(#M1 #T1 #PN)->x"),
         ONEARY_STMT("(#M1 #T1 #PN)->{ return x; }"),
         TWOARY_EXPR("(#M1 #T1 #PN, #M2 #T2 y)->x"),
         TWOARY_STMT("(#M1 #T1 #PN, #M2 #T2 y)->{ return x; }");
         String lambdaTemplate;
         LambdaKind(String lambdaTemplate) {
             this.lambdaTemplate = lambdaTemplate;
         }
         String getLambdaString(LambdaParameterKind pk1, LambdaParameterKind pk2,
                 ModifierKind mk1, ModifierKind mk2, LambdaParameterName pn) {
             return lambdaTemplate.replaceAll("#M1", mk1.modifier)
                     .replaceAll("#M2", mk2.modifier)
                     .replaceAll("#T1", pk1.parameterType)
                     .replaceAll("#T2", pk2.parameterType)
                     .replaceAll("#PN", pn.nameStr);
         }
         int arity() {
             switch (this) {
                 case NILARY_EXPR:
                 case NILARY_STMT: return 0;
                 case ONEARY_SHORT_EXPR:
                 case ONEARY_SHORT_STMT:
                 case ONEARY_EXPR:
                 case ONEARY_STMT: return 1;
                 case TWOARY_EXPR:
                 case TWOARY_STMT: return 2;
                 default: throw new AssertionError("Invalid lambda kind " + this);
             }
         }
         boolean isShort() {
             return this == ONEARY_SHORT_EXPR ||
                     this == ONEARY_SHORT_STMT;
         }
     }
     enum LambdaParameterName {
         IDENT("x"),
         UNDERSCORE("_");
         String nameStr;
         LambdaParameterName(String nameStr) {
             this.nameStr = nameStr;
         }
     }
     enum LambdaParameterKind {
         IMPLICIT(""),
         EXPLIICT_SIMPLE("A"),
         EXPLIICT_SIMPLE_ARR1("A[]"),
         EXPLIICT_SIMPLE_ARR2("A[][]"),
         EXPLICIT_VARARGS("A..."),
         EXPLICIT_GENERIC1("A<X>"),
         EXPLICIT_GENERIC2("A<? extends X, ? super Y>"),
         EXPLICIT_GENERIC2_VARARGS("A<? extends X, ? super Y>..."),
         EXPLICIT_GENERIC2_ARR1("A<? extends X, ? super Y>[]"),
         EXPLICIT_GENERIC2_ARR2("A<? extends X, ? super Y>[][]");
         String parameterType;
         LambdaParameterKind(String parameterType) {
             this.parameterType = parameterType;
         }
         boolean explicit() {
             return this != IMPLICIT;
         }
         boolean isVarargs() {
             return this == EXPLICIT_VARARGS ||
                     this == EXPLICIT_GENERIC2_VARARGS;
         }
     }
     enum ModifierKind {
         NONE(""),
         FINAL("final"),
         PUBLIC("public");
         String modifier;
         ModifierKind(String modifier) {
             this.modifier = modifier;
         }
         boolean compatibleWith(LambdaParameterKind pk) {
             switch (this) {
                 case PUBLIC: return false;
                 case FINAL: return pk != LambdaParameterKind.IMPLICIT;
                 case NONE: return true;
                 default: throw new AssertionError("Invalid modifier kind " + this);
             }
         }
     }
     enum ExprKind {
         NONE("#L#S"),
         SINGLE_PAREN1("(#L#S)"),
         SINGLE_PAREN2("(#L)#S"),
         DOUBLE_PAREN1("((#L#S))"),
         DOUBLE_PAREN2("((#L)#S)"),
         DOUBLE_PAREN3("((#L))#S");
         String expressionTemplate;
         ExprKind(String expressionTemplate) {
             this.expressionTemplate = expressionTemplate;
         }
         String expressionString(LambdaParameterKind pk1, LambdaParameterKind pk2,
                 ModifierKind mk1, ModifierKind mk2, LambdaKind lk, LambdaParameterName pn, SubExprKind sk) {
             return expressionTemplate.replaceAll("#L", lk.getLambdaString(pk1, pk2, mk1, mk2, pn))
                     .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 (LambdaKind lk : LambdaKind.values()) {
             for (LambdaParameterName pn : LambdaParameterName.values()) {
                 for (LambdaParameterKind pk1 : LambdaParameterKind.values()) {
                     if (lk.arity() < 1 && pk1 != LambdaParameterKind.IMPLICIT)
                         continue;
                     for (LambdaParameterKind pk2 : LambdaParameterKind.values()) {
                         if (lk.arity() < 2 && pk2 != LambdaParameterKind.IMPLICIT)
                             continue;
                         for (ModifierKind mk1 : ModifierKind.values()) {
                             if (mk1 != ModifierKind.NONE && lk.isShort())
                                 continue;
                             if (lk.arity() < 1 && mk1 != ModifierKind.NONE)
                                 continue;
                             for (ModifierKind mk2 : ModifierKind.values()) {
                                 if (lk.arity() < 2 && mk2 != ModifierKind.NONE)
                                     continue;
                                 for (SubExprKind sk : SubExprKind.values()) {
                                     for (ExprKind ek : ExprKind.values()) {
                                         pool.execute(
                                             new LambdaParserTest(pk1, pk2, mk1,
                                                                  mk2, lk, sk, ek, pn));
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }
         checkAfterExec();
     }
     LambdaParameterKind pk1;
     LambdaParameterKind pk2;
     ModifierKind mk1;
     ModifierKind mk2;
     LambdaKind lk;
     LambdaParameterName pn;
     SubExprKind sk;
     ExprKind ek;
     JavaSource source;
     DiagnosticChecker diagChecker;
     LambdaParserTest(LambdaParameterKind pk1, LambdaParameterKind pk2,
             ModifierKind mk1, ModifierKind mk2, LambdaKind lk,
             SubExprKind sk, ExprKind ek, LambdaParameterName pn) {
         this.pk1 = pk1;
         this.pk2 = pk2;
         this.mk1 = mk1;
         this.mk2 = mk2;
         this.lk = lk;
         this.pn = pn;
         this.sk = sk;
         this.ek = ek;
         this.source = new JavaSource();
         this.diagChecker = new DiagnosticChecker();
     }
     class JavaSource extends SimpleJavaFileObject {
         String template = "class Test {\n" +
                           "   SAM s = #E;\n" +
                           "}";
         String source;
         public JavaSource() {
             super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);
             source = template.replaceAll("#E",
                     ek.expressionString(pk1, pk2, mk1, mk2, lk, pn, sk));
         }
         @Override
         public CharSequence getCharContent(boolean ignoreEncodingErrors) {
             return source;
         }
     }
     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();
         boolean errorExpected = (lk.arity() > 0 && !mk1.compatibleWith(pk1)) ||
                 (lk.arity() > 1 && !mk2.compatibleWith(pk2));
         if (lk.arity() == 2 &&
                 (pk1.explicit() != pk2.explicit() ||
                 pk1.isVarargs())) {
             errorExpected = true;
         }
         errorExpected |= pn == LambdaParameterName.UNDERSCORE &&
                 lk.arity() > 0;
         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/lambda/LambdaParserTest.java@c09b7234cded (annotated)

test/tools/javac/lambda/LambdaParserTest.java