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test/tools/javac/lambda/methodReferenceExecution/MethodReferenceTestSueCase2.java@c09b7234cded (annotated)

test/tools/javac/lambda/methodReferenceExecution/MethodReferenceTestSueCase2.java

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

author

rfield

date

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

changeset 1752

c09b7234cded

parent 1448

7d34e91f66bb

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

rfield@1422	1	/*
katleman@1448	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
rfield@1422	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
rfield@1422	4	*
rfield@1422	5	* This code is free software; you can redistribute it and/or modify it
rfield@1422	6	* under the terms of the GNU General Public License version 2 only, as
rfield@1422	7	* published by the Free Software Foundation. Oracle designates this
rfield@1422	8	* particular file as subject to the "Classpath" exception as provided
rfield@1422	9	* by Oracle in the LICENSE file that accompanied this code.
rfield@1422	10	*
rfield@1422	11	* This code is distributed in the hope that it will be useful, but WITHOUT
rfield@1422	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
rfield@1422	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
rfield@1422	14	* version 2 for more details (a copy is included in the LICENSE file that
rfield@1422	15	* accompanied this code).
rfield@1422	16	*
rfield@1422	17	* You should have received a copy of the GNU General Public License version
rfield@1422	18	* 2 along with this work; if not, write to the Free Software Foundation,
rfield@1422	19	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
rfield@1422	20	*
rfield@1422	21	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
rfield@1422	22	* or visit www.oracle.com if you need additional information or have any
rfield@1422	23	* questions.
rfield@1422	24	*/
rfield@1422	25
rfield@1422	26	/**
rfield@1422	27	* @test
rfield@1422	28	* @bug 8003639
rfield@1422	29	* @summary convert lambda testng tests to jtreg and add them
rfield@1422	30	* @run testng MethodReferenceTestSueCase2
rfield@1422	31	*/
rfield@1422	32
rfield@1422	33	import org.testng.annotations.Test;
rfield@1422	34
rfield@1422	35	import static org.testng.Assert.assertEquals;
rfield@1422	36
rfield@1422	37	/**
rfield@1422	38	* @author Robert Field
rfield@1422	39	*/
rfield@1422	40
rfield@1422	41	@Test
rfield@1422	42	public class MethodReferenceTestSueCase2 {
rfield@1422	43
rfield@1422	44	public interface Sam2<T> { public String get(T target, String s); }
rfield@1422	45
rfield@1422	46	String instanceMethod(String s) { return "2"; }
rfield@1422	47	static Sam2<MethodReferenceTestSueCase2> var = MethodReferenceTestSueCase2::instanceMethod;
rfield@1422	48
rfield@1422	49	String m() { return var.get(new MethodReferenceTestSueCase2(), ""); }
rfield@1422	50
rfield@1422	51	public void testSueCase2() {
rfield@1422	52	assertEquals(m(), "2");
rfield@1422	53	}
rfield@1422	54	}