jdk8-mips64-public/langtools: test/tools/javac/lambda/lambdaExpression/LambdaTest6.java@998b10c43157

8029230: Update copyright year to match last edit in jdk8 langtools repository for 2013
Reviewed-by: ksrini
Contributed-by: steve.sides@oracle.com

     1 /*

     2  * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /**

    25  * @test

    26  * @bug 8003280

    27  * @summary Add lambda tests

    28  *   Test bridge methods for certain SAM conversions

    29  * @compile LambdaTest6.java

    30  * @run main LambdaTest6

    31  */

    33 import java.lang.reflect.Method;

    34 import java.util.HashSet;

    35 import java.util.Set;

    37 public class LambdaTest6<T> {

    39     interface H {Object m();}

    41     interface K<U> {void m(U element);}

    43     interface L extends K<String> {} //generic substitution

    45     interface M {void m(String s);}

    47     interface KM extends K<String>, M{} //generic substitution

    49     interface N extends H {String m();} //covariant return

    51     private static void assertTrue(boolean b) {

    52         if(!b)

    53             throw new AssertionError();

    54     }

    56     private Set<String> setOfStringObject() {

    57         Set<String> s = new HashSet<>();

    58         s.add("java.lang.String");

    59         s.add("java.lang.Object");

    60         return s;

    61     }

    63     private void test1()

    64     {

    65         L la = s -> { };

    66         la.m("hi");

    67         Class<? extends L> c1 = la.getClass();

    68         Method[] methods = c1.getDeclaredMethods();

    69         Set<String> types = setOfStringObject();

    70         for(Method m : methods) {

    71             assertTrue(m.getName().equals("m"));

    72             Class[] parameterTypes = m.getParameterTypes();

    73             assertTrue(parameterTypes.length == 1);

    74             assertTrue(types.remove(parameterTypes[0].getName()));

    75         }

    76         assertTrue(types.isEmpty() || (types.size() == 1 && types.contains("java.lang.String")));

    77     }

    79     private void test2()

    80     {

    81         KM km = s -> { };

    82         //km.m("hi");

    83         Class<? extends KM> c2 = km.getClass();

    84         Method[] methods = c2.getDeclaredMethods();

    85         Set<String> types = setOfStringObject();

    86         for(Method m : methods) {

    87             assertTrue(m.getName().equals("m"));

    88             Class[] parameterTypes = m.getParameterTypes();

    89             assertTrue(parameterTypes.length == 1);

    90             assertTrue(types.remove(parameterTypes[0].getName()));

    91         }

    92         assertTrue(types.isEmpty());

    93     }

    95     private void test3()

    96     {

    97         N na = ()-> "hi";

    98         assertTrue( na.m().equals("hi") );

    99         assertTrue( ((H)na).m().equals("hi") );

   100         Class<? extends N> c3 = na.getClass();

   101         Method[] methods = c3.getDeclaredMethods();

   102         Set<String> types = setOfStringObject();

   103         for(Method m : methods) {

   104             assertTrue(m.getName().equals("m"));

   105             Class returnType = m.getReturnType();

   106             assertTrue(types.remove(returnType.getName()));

   107         }

   108         assertTrue(types.size() == 1); //there's a bridge

   109     }

   112     public static void main(String[] args) {

   113         LambdaTest6 test = new LambdaTest6();

   114         test.test1();

   115         test.test2();

   116         test.test3();

   117     }

   118 }

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