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

test/tools/javac/lambda/InnerConstructor.java

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

author

rfield

date

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

changeset 1752

c09b7234cded

parent 1415

01c9d4161882

child 2255

b2e4c5ca111f

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@1405	1	/*
rfield@1405	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
rfield@1405	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
rfield@1405	4	*
rfield@1405	5	* This code is free software; you can redistribute it and/or modify it
rfield@1405	6	* under the terms of the GNU General Public License version 2 only, as
rfield@1405	7	* published by the Free Software Foundation.
rfield@1405	8	*
rfield@1405	9	* This code is distributed in the hope that it will be useful, but WITHOUT
rfield@1405	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
rfield@1405	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
rfield@1405	12	* version 2 for more details (a copy is included in the LICENSE file that
rfield@1405	13	* accompanied this code).
rfield@1405	14	*
rfield@1405	15	* You should have received a copy of the GNU General Public License version
rfield@1405	16	* 2 along with this work; if not, write to the Free Software Foundation,
rfield@1405	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
rfield@1405	18	*
rfield@1405	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
rfield@1405	20	* or visit www.oracle.com if you need additional information or have any
rfield@1405	21	* questions.
rfield@1405	22	*/
rfield@1405	23
rfield@1405	24	/*
rfield@1405	25	* @test
mcimadamore@1415	26	* @bug 8003280
mcimadamore@1415	27	* @summary Add lambda tests
mcimadamore@1415	28	* Regression test JDK-8003306 inner class constructor in lambda
rfield@1405	29	* @author Robert Field
rfield@1405	30	*/
rfield@1405	31
mcimadamore@1415	32	public class InnerConstructor {
rfield@1405	33
mcimadamore@1415	34	public static void main(String... args) {
mcimadamore@1415	35	InnerConstructor ic = new InnerConstructor();
mcimadamore@1415	36	String res = ic.seq1().m().toString();
mcimadamore@1415	37	if (!res.equals("Cbl.toString")) {
mcimadamore@1415	38	throw new AssertionError(String.format("Unexpected result: %s", res));
mcimadamore@1415	39	}
rfield@1405	40	}
rfield@1405	41
rfield@1405	42	Ib1 seq1() {
rfield@1405	43	return () -> new Cbl();
rfield@1405	44	}
rfield@1405	45
rfield@1405	46	class Cbl {
rfield@1405	47	Cbl() { }
mcimadamore@1415	48	public String toString() {
mcimadamore@1415	49	return "Cbl.toString";
mcimadamore@1415	50	}
rfield@1405	51	}
rfield@1405	52
rfield@1405	53	interface Ib1 {
rfield@1405	54	Object m();
rfield@1405	55	}
rfield@1405	56	}