jdk8-mips64-public/langtools: test/tools/javac/lambda/lambdaExecution/LambdaTranslationTest2.java@c09b7234cded (annotated)

test/tools/javac/lambda/lambdaExecution/LambdaTranslationTest2.java@c09b7234cded (annotated)

test/tools/javac/lambda/lambdaExecution/LambdaTranslationTest2.java

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

author: rfield
date: Tue, 14 May 2013 11:11:09 -0700
changeset 1752: c09b7234cded
parent 0: 959103a6100f
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, 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.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * 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 8003639
  * @summary convert lambda testng tests to jtreg and add them
  * @run testng LambdaTranslationTest2
  */
 import org.testng.annotations.Test;
 import java.util.ArrayList;
 import java.util.List;
 import static org.testng.Assert.assertEquals;
 import static org.testng.Assert.assertTrue;
 /**
  * LambdaTranslationTest2 -- end-to-end smoke tests for lambda evaluation
  */
 @Test
 public class LambdaTranslationTest2 {
     final String dummy = "dummy";
     public void testLambdas() {
         TPredicate<String> isEmpty = s -> s.isEmpty();
         assertTrue(isEmpty.test(""));
         assertTrue(!isEmpty.test("foo"));
         TPredicate<Object> oIsEmpty = s -> ((String) s).isEmpty();
         assertTrue(oIsEmpty.test(""));
         assertTrue(!oIsEmpty.test("foo"));
         TPredicate<Object> alwaysTrue = o -> true;
         assertTrue(alwaysTrue.test(""));
         assertTrue(alwaysTrue.test(null));
         TPredicate<Object> alwaysFalse = o -> false;
         assertTrue(!alwaysFalse.test(""));
         assertTrue(!alwaysFalse.test(null));
         // tests local capture
         String foo = "foo";
         TPredicate<String> equalsFoo = s -> s.equals(foo);
         assertTrue(!equalsFoo.test(""));
         assertTrue(equalsFoo.test("foo"));
         // tests instance capture
         TPredicate<String> equalsDummy = s -> s.equals(dummy);
         assertTrue(!equalsDummy.test(""));
         assertTrue(equalsDummy.test("dummy"));
         TMapper<Object, Object> ident = s -> s;
         assertEquals("blarf", ident.map("blarf"));
         assertEquals("wooga", ident.map("wooga"));
         assertTrue("wooga" == ident.map("wooga"));
         // constant capture
         TMapper<Object, Object> prefixer = s -> "p" + s;
         assertEquals("pblarf", prefixer.map("blarf"));
         assertEquals("pwooga", prefixer.map("wooga"));
         // instance capture
         TMapper<Object, Object> prefixer2 = s -> dummy + s;
         assertEquals("dummyblarf", prefixer2.map("blarf"));
         assertEquals("dummywooga", prefixer2.map("wooga"));
     }
     interface Factory<T> {
         T make();
     }
     interface StringFactory extends Factory<String> { }
     interface StringFactory2 extends Factory<String> {
         String make();
     }
     public void testBridges() {
         Factory<String> of = () -> "y";
         Factory<?> ef = () -> "z";
         assertEquals("y", of.make());
         assertEquals("y", ((Factory<?>) of).make());
         assertEquals("y", ((Factory) of).make());
         assertEquals("z", ef.make());
         assertEquals("z", ((Factory) ef).make());
     }
     public void testBridgesImplicitSpecialization() {
         StringFactory sf = () -> "x";
         assertEquals("x", sf.make());
         assertEquals("x", ((Factory<String>) sf).make());
         assertEquals("x", ((Factory<?>) sf).make());
         assertEquals("x", ((Factory) sf).make());
     }
     public void testBridgesExplicitSpecialization() {
         StringFactory2 sf = () -> "x";
         assertEquals("x", sf.make());
         assertEquals("x", ((Factory<String>) sf).make());
         assertEquals("x", ((Factory<?>) sf).make());
         assertEquals("x", ((Factory) sf).make());
     }
     public void testSuperCapture() {
         class A {
             String make() { return "x"; }
         }
         class B extends A {
             void testSuperCapture() {
                 StringFactory sf = () -> super.make();
                 assertEquals("x", sf.make());
             }
         }
         new B().testSuperCapture();
     }
     interface WidenD {
         public String m(float a0, double a1);
     }
     interface WidenS {
         public String m(byte a0, short a1);
     }
     interface WidenI {
         public String m(byte a0, short a1, char a2, int a3);
     }
     interface WidenL {
         public String m(byte a0, short a1, char a2, int a3, long a4);
     }
     interface Box {
         public String m(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7);
     }
     static String pb(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7) {
         return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
     }
     static String pwI1(int a0, int a1, int a2, int a3) {
         return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
     }
     static String pwI2(Integer a0, Integer a1, Integer a2, Integer a3) {
         return String.format("b%d s%d c%d i%d", a0, a1, a2, a3);
     }
     static String pwL1(long a0, long a1, long a2, long a3, long a4) {
         return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
     }
     static String pwL2(Long a0, Long a1, Long a2, Long a3, Long a4) {
         return String.format("b%d s%d c%d i%d j%d", a0, a1, a2, a3, a4);
     }
     static String pwS1(short a0, short a1) {
         return String.format("b%d s%d", a0, a1);
     }
     static String pwS2(Short a0, Short a1) {
         return String.format("b%d s%d", a0, a1);
     }
     static String pwD1(double a0, double a1) {
         return String.format("f%f d%f", a0, a1);
     }
     static String pwD2(Double a0, Double a1) {
         return String.format("f%f d%f", a0, a1);
     }
     public void testPrimitiveWidening() {
         WidenS ws1 = LambdaTranslationTest2::pwS1;
         assertEquals("b1 s2", ws1.m((byte) 1, (short) 2));
         WidenD wd1 = LambdaTranslationTest2::pwD1;
         assertEquals("f1.000000 d2.000000", wd1.m(1.0f, 2.0));
         WidenI wi1 = LambdaTranslationTest2::pwI1;
         assertEquals("b1 s2 c3 i4", wi1.m((byte) 1, (short) 2, (char) 3, 4));
         WidenL wl1 = LambdaTranslationTest2::pwL1;
         assertEquals("b1 s2 c3 i4 j5", wl1.m((byte) 1, (short) 2, (char) 3, 4, 5L));
         // @@@ TODO: clarify spec on widen+box conversion
     }
     interface Unbox {
         public String m(Byte a0, Short a1, Character a2, Integer a3, Long a4, Boolean a5, Float a6, Double a7);
     }
     static String pu(byte a0, short a1, char a2, int a3, long a4, boolean a5, float a6, double a7) {
         return String.format("b%d s%d c%c i%d j%d z%b f%f d%f", a0, a1, a2, a3, a4, a5, a6, a7);
     }
     public void testUnboxing() {
         Unbox u = LambdaTranslationTest2::pu;
         assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", u.m((byte)1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
     }
     public void testBoxing() {
         Box b = LambdaTranslationTest2::pb;
         assertEquals("b1 s2 cA i4 j5 ztrue f6.000000 d7.000000", b.m((byte) 1, (short) 2, 'A', 4, 5L, true, 6.0f, 7.0));
     }
     static boolean cc(Object o) {
         return ((String) o).equals("foo");
     }
     public void testArgCastingAdaptation() {
         TPredicate<String> p = LambdaTranslationTest2::cc;
         assertTrue(p.test("foo"));
         assertTrue(!p.test("bar"));
     }
     interface SonOfPredicate<T> extends TPredicate<T> { }
     public void testExtendsSAM() {
         SonOfPredicate<String> p = s -> s.isEmpty();
         assertTrue(p.test(""));
         assertTrue(!p.test("foo"));
     }
     public void testConstructorRef() {
         Factory<List<String>> lf = ArrayList<String>::new;
         List<String> list = lf.make();
         assertTrue(list instanceof ArrayList);
         assertTrue(list != lf.make());
         list.add("a");
         assertEquals("[a]", list.toString());
     }
     private static String privateMethod() {
         return "private";
     }
     public void testPrivateMethodRef() {
         Factory<String> sf = LambdaTranslationTest2::privateMethod;
         assertEquals("private", sf.make());
     }
     private interface PrivateIntf {
         String make();
     }
     public void testPrivateIntf() {
         PrivateIntf p = () -> "foo";
         assertEquals("foo", p.make());
     }
     interface Op<T> {
         public T op(T a, T b);
     }
     public void testBoxToObject() {
         Op<Integer> maxer = Math::max;
         for (int i=-100000; i < 100000; i += 100)
             for (int j=-100000; j < 100000; j += 99) {
                 assertEquals((int) maxer.op(i,j), Math.max(i,j));
             }
     }
     protected static String protectedMethod() {
         return "protected";
     }
     public void testProtectedMethodRef() {
         Factory<String> sf = LambdaTranslationTest2::protectedMethod;
         assertEquals("protected", sf.make());
     }
     class Inner1 {
         String m1() {
             return "Inner1.m1()";
         }
         class Inner2 {
             public String m1() {
                 return "Inner1.Inner2.m1()";
             }
             protected String m2() {
                 return "Inner1.Inner2.m2()";
             }
             String m3() {
                 return "Inner1.Inner2.m3()";
             }
             class Inner3<T> {
                 T t = null;
                 Inner3(T t) {
                     this.t = t;
                 }
                 T m1() {
                     return t;
                 }
             }
         }
     }
     public void testInnerClassMethodRef() {
         Factory<String> fs = new Inner1()::m1;
         assertEquals("Inner1.m1()", fs.make());
         fs = new Inner1().new Inner2()::m1;
         assertEquals("Inner1.Inner2.m1()", fs.make());
         fs = new Inner1().new Inner2()::m2;
         assertEquals("Inner1.Inner2.m2()", fs.make());
         fs = new Inner1().new Inner2()::m3;
         assertEquals("Inner1.Inner2.m3()", fs.make());
         fs = new Inner1().new Inner2().new Inner3<String>("Inner1.Inner2.Inner3")::m1;
         assertEquals("Inner1.Inner2.Inner3", fs.make());
         Factory<Integer> fsi = new Inner1().new Inner2().new Inner3<Integer>(100)::m1;
         assertEquals(100, (int)fsi.make());
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

test/tools/javac/lambda/lambdaExecution/LambdaTranslationTest2.java@c09b7234cded (annotated)

test/tools/javac/lambda/lambdaExecution/LambdaTranslationTest2.java