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

test/tools/javac/lambda/methodReferenceExecution/MethodReferenceTestNew.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

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation. Oracle designates this
aoqi@0	8	* particular file as subject to the "Classpath" exception as provided
aoqi@0	9	* by Oracle in the LICENSE file that accompanied this code.
aoqi@0	10	*
aoqi@0	11	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	14	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	15	* accompanied this code).
aoqi@0	16	*
aoqi@0	17	* You should have received a copy of the GNU General Public License version
aoqi@0	18	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	20	*
aoqi@0	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	22	* or visit www.oracle.com if you need additional information or have any
aoqi@0	23	* questions.
aoqi@0	24	*/
aoqi@0	25
aoqi@0	26	/**
aoqi@0	27	* @test
aoqi@0	28	* @bug 8003639
aoqi@0	29	* @summary convert lambda testng tests to jtreg and add them
aoqi@0	30	* @run testng MethodReferenceTestNew
aoqi@0	31	*/
aoqi@0	32
aoqi@0	33	import org.testng.annotations.Test;
aoqi@0	34
aoqi@0	35	import static org.testng.Assert.assertEquals;
aoqi@0	36
aoqi@0	37	/**
aoqi@0	38	* @author Robert Field
aoqi@0	39	*/
aoqi@0	40
aoqi@0	41	@Test
aoqi@0	42	public class MethodReferenceTestNew {
aoqi@0	43
aoqi@0	44	interface M0<T> {
aoqi@0	45
aoqi@0	46	T m();
aoqi@0	47	}
aoqi@0	48
aoqi@0	49	static class N0 {
aoqi@0	50
aoqi@0	51	N0() {
aoqi@0	52	}
aoqi@0	53	}
aoqi@0	54
aoqi@0	55	interface M1<T> {
aoqi@0	56
aoqi@0	57	T m(Integer a);
aoqi@0	58	}
aoqi@0	59
aoqi@0	60	static class N1 {
aoqi@0	61
aoqi@0	62	int i;
aoqi@0	63
aoqi@0	64	N1(int i) {
aoqi@0	65	this.i = i;
aoqi@0	66	}
aoqi@0	67	}
aoqi@0	68
aoqi@0	69	interface M2<T> {
aoqi@0	70
aoqi@0	71	T m(Integer n, String o);
aoqi@0	72	}
aoqi@0	73
aoqi@0	74	static class N2 {
aoqi@0	75
aoqi@0	76	Number n;
aoqi@0	77	Object o;
aoqi@0	78
aoqi@0	79	N2(Number n, Object o) {
aoqi@0	80	this.n = n;
aoqi@0	81	this.o = o;
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	public String toString() {
aoqi@0	85	return "N2(" + n + "," + o + ")";
aoqi@0	86	}
aoqi@0	87	}
aoqi@0	88
aoqi@0	89	interface MV {
aoqi@0	90
aoqi@0	91	NV m(Integer ai, int i);
aoqi@0	92	}
aoqi@0	93
aoqi@0	94	static class NV {
aoqi@0	95
aoqi@0	96	int i;
aoqi@0	97
aoqi@0	98	NV(int... v) {
aoqi@0	99	i = 0;
aoqi@0	100	for (int x : v) {
aoqi@0	101	i += x;
aoqi@0	102	}
aoqi@0	103	}
aoqi@0	104
aoqi@0	105	public String toString() {
aoqi@0	106	return "NV(" + i + ")";
aoqi@0	107	}
aoqi@0	108	}
aoqi@0	109
aoqi@0	110	public void testConstructorReference0() {
aoqi@0	111	M0<N0> q;
aoqi@0	112
aoqi@0	113	q = N0::new;
aoqi@0	114	assertEquals(q.m().getClass().getSimpleName(), "N0");
aoqi@0	115	}
aoqi@0	116
aoqi@0	117	public void testConstructorReference1() {
aoqi@0	118	M1<N1> q;
aoqi@0	119
aoqi@0	120	q = N1::new;
aoqi@0	121	assertEquals(q.m(14).getClass().getSimpleName(), "N1");
aoqi@0	122	}
aoqi@0	123
aoqi@0	124	public void testConstructorReference2() {
aoqi@0	125	M2<N2> q;
aoqi@0	126
aoqi@0	127	q = N2::new;
aoqi@0	128	assertEquals(q.m(7, "hi").toString(), "N2(7,hi)");
aoqi@0	129	}
aoqi@0	130
aoqi@0	131	public void testConstructorReferenceVarArgs() {
aoqi@0	132	MV q;
aoqi@0	133
aoqi@0	134	q = NV::new;
aoqi@0	135	assertEquals(q.m(5, 45).toString(), "NV(50)");
aoqi@0	136	}
aoqi@0	137
aoqi@0	138	}