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test/tools/javac/lambda/funcInterfaces/Helper.java@349160289ba2 (annotated)

test/tools/javac/lambda/funcInterfaces/Helper.java

Thu, 06 Jun 2013 15:33:40 +0100

author

mcimadamore

date

Thu, 06 Jun 2013 15:33:40 +0100

changeset 1811

349160289ba2

parent 0

959103a6100f

permissions

-rw-r--r--

8008627: Compiler mishandles three-way return-type-substitutability
Summary: Compiler should not enforce an order in how ambiguous methods should be resolved
Reviewed-by: jjg, vromero

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2011, 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.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*SAM types:
aoqi@0	25	1. An interface that has a single abstract method
aoqi@0	26	2. Having more than one distinct methods, but only one is "real", the others are overriden public methods in Object - example: Comparator<T>
aoqi@0	27	3. Having more than one methods due to inheritance, but they have the same signature
aoqi@0	28	4. Having more than one methods due to inheritance, but one of them has a subsignature of all other methods
aoqi@0	29	a) parameter types compatible
aoqi@0	30	b) return type substitutable
aoqi@0	31	c) thrown type not conflicting with the thrown clause of any other method
aoqi@0	32	d) mixed up
aoqi@0	33	5. Type-dependent SAM types
aoqi@0	34	non-SAM types:
aoqi@0	35	6. An interface that has a single abstract method, which is also public method in Object
aoqi@0	36	7. Having more than one methods due to inheritance, and none of them has a subsignature of all other methods
aoqi@0	37	*/
aoqi@0	38
aoqi@0	39	import java.util.List;
aoqi@0	40	import java.util.Collection;
aoqi@0	41	import java.sql.SQLException;
aoqi@0	42	import java.sql.SQLTransientException;
aoqi@0	43	import java.util.concurrent.TimeoutException;
aoqi@0	44	import java.io.*;
aoqi@0	45
aoqi@0	46	interface A {int getOldest(List<Number> list);}
aoqi@0	47	interface B {int getOldest(List list);}
aoqi@0	48	interface C {int getOldest(List<?> list);}
aoqi@0	49	interface D {int getOldest(List<Integer> list);}
aoqi@0	50	interface E {int getOldest(Collection<?> collection);}
aoqi@0	51	//Not SAM type, case #7
aoqi@0	52	interface DE extends D, E {}
aoqi@0	53
aoqi@0	54	interface Foo {int getAge(Number n);}
aoqi@0	55	interface Bar {int getAge(Integer i);}
aoqi@0	56	//Not SAM type, case #7
aoqi@0	57	interface FooBar extends Foo, Bar {}
aoqi@0	58
aoqi@0	59	//Not SAM type, case #6
aoqi@0	60	interface Planet {boolean equals(Object o);}
aoqi@0	61
aoqi@0	62	// SAM type interfaces:
aoqi@0	63	// type #2:
aoqi@0	64	//only one abstract non-Ojbect method getAge()
aoqi@0	65	interface Mars<T> extends Planet {int getAge(T t);}
aoqi@0	66	//only one abstract non-Ojbect method increment()
aoqi@0	67	interface Jupiter {
aoqi@0	68	boolean equals(Object o);
aoqi@0	69	String toString();
aoqi@0	70	int increment(int i);
aoqi@0	71	}
aoqi@0	72
aoqi@0	73	// type #3:
aoqi@0	74	interface X {int getTotal(List<String> arg);}
aoqi@0	75	interface Y {int getTotal(List<String> strs);}
aoqi@0	76	//SAM type ([List<String>], int, {})
aoqi@0	77	interface XY extends X, Y {}
aoqi@0	78	//SAM type ([List<String>], int, {})
aoqi@0	79	interface XYZ extends X, Y, XY {}
aoqi@0	80
aoqi@0	81	// type #4 a):
aoqi@0	82	//SAM type ([List], int, {})
aoqi@0	83	interface AB extends A, B {}
aoqi@0	84
aoqi@0	85	// type #4 b):
aoqi@0	86	interface F {Number getValue(String str);}
aoqi@0	87	interface G {Integer getValue(String str);}
aoqi@0	88	interface H {Serializable getValue(String str);}
aoqi@0	89	interface I {Object getValue(String str);}
aoqi@0	90	//SAM type ([String], Integer, {})
aoqi@0	91	interface FGHI extends F, G, H, I {}
aoqi@0	92
aoqi@0	93	interface J {List<Number> getAll(String str);}
aoqi@0	94	interface K {List<?> getAll(String str);}
aoqi@0	95	interface L {List getAll(String str);}
aoqi@0	96	interface M {Collection getAll(String str);}
aoqi@0	97	//SAM type ([String], List<Number>/List, {}) - the return type is flexible to some degree
aoqi@0	98	interface JK extends J, K {}
aoqi@0	99	//SAM type ([String], List<Number>/List, {})
aoqi@0	100	interface JL extends J, L {}
aoqi@0	101	//SAM type ([String], List<Number>/List, {})
aoqi@0	102	interface JKL extends J, K, L {}
aoqi@0	103	//SAM type ([String], List<Number>/List, {})
aoqi@0	104	interface JKLM extends J, K, L, M {}
aoqi@0	105
aoqi@0	106	// type #4 c):
aoqi@0	107	interface N {String getText(File f) throws IOException;}
aoqi@0	108	interface O {String getText(File f) throws FileNotFoundException;}
aoqi@0	109	interface P {String getText(File f) throws NullPointerException;}
aoqi@0	110	//SAM type ([File], String, {FileNotFoundException})
aoqi@0	111	interface NO extends N, O {}
aoqi@0	112	//SAM type ([File], String, {})
aoqi@0	113	interface NOP extends N, O, P {}
aoqi@0	114
aoqi@0	115	interface Boo {int getAge(String s) throws IOException;}
aoqi@0	116	interface Doo {int getAge(String s) throws SQLException;}
aoqi@0	117	//SAM type ([String], int, {})
aoqi@0	118	interface BooDoo extends Boo, Doo {}
aoqi@0	119
aoqi@0	120	// type #4 d):
aoqi@0	121	interface Q {Iterable m(Iterable<String> arg);}
aoqi@0	122	interface R {Iterable<String> m(Iterable arg);}
aoqi@0	123	//SAM type ([Iterable], Iterable<String>/Iterable, {})
aoqi@0	124	interface QR extends Q, R {}
aoqi@0	125
aoqi@0	126	interface U {Collection foo(List<String> arg) throws IOException, SQLTransientException;}
aoqi@0	127	interface V {List<?> foo(List<String> arg) throws EOFException, SQLException, TimeoutException;}
aoqi@0	128	interface W {List<String> foo(List arg) throws Exception;}
aoqi@0	129	//SAM type ([List<String>], List<String>/List, {EOFException, SQLTransientException})
aoqi@0	130	interface UV extends U, V {}
aoqi@0	131	// SAM type ([List], List<String>/List, {EOFException, SQLTransientException})
aoqi@0	132	interface UVW extends U, V, W {}
aoqi@0	133
aoqi@0	134	// type #5:
aoqi@0	135	// Not a SAM because sam-ness depends on instantiation of type-variables
aoqi@0	136	interface Qoo<T> {void m(T arg);}
aoqi@0	137	interface Roo<S extends Number> {void m(S arg);}
aoqi@0	138	interface QooRoo<T1, T2 extends Number, T3> extends Qoo<T1>, Roo<T2> {}