1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/tools/javac/lambda/funcInterfaces/Helper.java Wed Apr 27 01:34:52 2016 +0800
1.3 @@ -0,0 +1,138 @@
1.4 +/*
1.5 + * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*SAM types:
1.28 + 1. An interface that has a single abstract method
1.29 + 2. Having more than one distinct methods, but only one is "real", the others are overriden public methods in Object - example: Comparator<T>
1.30 + 3. Having more than one methods due to inheritance, but they have the same signature
1.31 + 4. Having more than one methods due to inheritance, but one of them has a subsignature of all other methods
1.32 + a) parameter types compatible
1.33 + b) return type substitutable
1.34 + c) thrown type not conflicting with the thrown clause of any other method
1.35 + d) mixed up
1.36 + 5. Type-dependent SAM types
1.37 + non-SAM types:
1.38 + 6. An interface that has a single abstract method, which is also public method in Object
1.39 + 7. Having more than one methods due to inheritance, and none of them has a subsignature of all other methods
1.40 +*/
1.41 +
1.42 +import java.util.List;
1.43 +import java.util.Collection;
1.44 +import java.sql.SQLException;
1.45 +import java.sql.SQLTransientException;
1.46 +import java.util.concurrent.TimeoutException;
1.47 +import java.io.*;
1.48 +
1.49 +interface A {int getOldest(List<Number> list);}
1.50 +interface B {int getOldest(List list);}
1.51 +interface C {int getOldest(List<?> list);}
1.52 +interface D {int getOldest(List<Integer> list);}
1.53 +interface E {int getOldest(Collection<?> collection);}
1.54 +//Not SAM type, case #7
1.55 +interface DE extends D, E {}
1.56 +
1.57 +interface Foo {int getAge(Number n);}
1.58 +interface Bar {int getAge(Integer i);}
1.59 +//Not SAM type, case #7
1.60 +interface FooBar extends Foo, Bar {}
1.61 +
1.62 +//Not SAM type, case #6
1.63 +interface Planet {boolean equals(Object o);}
1.64 +
1.65 +// SAM type interfaces:
1.66 +// type #2:
1.67 +//only one abstract non-Ojbect method getAge()
1.68 +interface Mars<T> extends Planet {int getAge(T t);}
1.69 +//only one abstract non-Ojbect method increment()
1.70 +interface Jupiter {
1.71 + boolean equals(Object o);
1.72 + String toString();
1.73 + int increment(int i);
1.74 +}
1.75 +
1.76 +// type #3:
1.77 +interface X {int getTotal(List<String> arg);}
1.78 +interface Y {int getTotal(List<String> strs);}
1.79 +//SAM type ([List<String>], int, {})
1.80 +interface XY extends X, Y {}
1.81 +//SAM type ([List<String>], int, {})
1.82 +interface XYZ extends X, Y, XY {}
1.83 +
1.84 +// type #4 a):
1.85 +//SAM type ([List], int, {})
1.86 +interface AB extends A, B {}
1.87 +
1.88 +// type #4 b):
1.89 +interface F {Number getValue(String str);}
1.90 +interface G {Integer getValue(String str);}
1.91 +interface H {Serializable getValue(String str);}
1.92 +interface I {Object getValue(String str);}
1.93 +//SAM type ([String], Integer, {})
1.94 +interface FGHI extends F, G, H, I {}
1.95 +
1.96 +interface J {List<Number> getAll(String str);}
1.97 +interface K {List<?> getAll(String str);}
1.98 +interface L {List getAll(String str);}
1.99 +interface M {Collection getAll(String str);}
1.100 +//SAM type ([String], List<Number>/List, {}) - the return type is flexible to some degree
1.101 +interface JK extends J, K {}
1.102 +//SAM type ([String], List<Number>/List, {})
1.103 +interface JL extends J, L {}
1.104 +//SAM type ([String], List<Number>/List, {})
1.105 +interface JKL extends J, K, L {}
1.106 +//SAM type ([String], List<Number>/List, {})
1.107 +interface JKLM extends J, K, L, M {}
1.108 +
1.109 +// type #4 c):
1.110 +interface N {String getText(File f) throws IOException;}
1.111 +interface O {String getText(File f) throws FileNotFoundException;}
1.112 +interface P {String getText(File f) throws NullPointerException;}
1.113 +//SAM type ([File], String, {FileNotFoundException})
1.114 +interface NO extends N, O {}
1.115 +//SAM type ([File], String, {})
1.116 +interface NOP extends N, O, P {}
1.117 +
1.118 +interface Boo {int getAge(String s) throws IOException;}
1.119 +interface Doo {int getAge(String s) throws SQLException;}
1.120 +//SAM type ([String], int, {})
1.121 +interface BooDoo extends Boo, Doo {}
1.122 +
1.123 +// type #4 d):
1.124 +interface Q {Iterable m(Iterable<String> arg);}
1.125 +interface R {Iterable<String> m(Iterable arg);}
1.126 +//SAM type ([Iterable], Iterable<String>/Iterable, {})
1.127 +interface QR extends Q, R {}
1.128 +
1.129 +interface U {Collection foo(List<String> arg) throws IOException, SQLTransientException;}
1.130 +interface V {List<?> foo(List<String> arg) throws EOFException, SQLException, TimeoutException;}
1.131 +interface W {List<String> foo(List arg) throws Exception;}
1.132 +//SAM type ([List<String>], List<String>/List, {EOFException, SQLTransientException})
1.133 +interface UV extends U, V {}
1.134 +// SAM type ([List], List<String>/List, {EOFException, SQLTransientException})
1.135 +interface UVW extends U, V, W {}
1.136 +
1.137 +// type #5:
1.138 +// Not a SAM because sam-ness depends on instantiation of type-variables
1.139 +interface Qoo<T> {void m(T arg);}
1.140 +interface Roo<S extends Number> {void m(S arg);}
1.141 +interface QooRoo<T1, T2 extends Number, T3> extends Qoo<T1>, Roo<T2> {}
