javaclassoverrides.js revision 877:cf4d2252d444 
1/*
2 * Copyright (c) 2010, 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 */
23
24/**
25 * Check behavior of class-level overrides.
26 *
27 * @test
28 * @run
29 */
30
31
32// Make two classes with class overrides
33
34var R1 = Java.extend(java.lang.Runnable, {
35    run: function() {
36        print("R1.run() invoked")
37    }
38})
39
40var R2 = Java.extend(java.lang.Runnable, {
41    run: function() {
42        print("R2.run() invoked")
43    }
44})
45
46var r1 = new R1
47var r2 = new R2
48// Create one with an instance-override too
49var R3 = Java.extend(R2)
50var r3 = new R3({ run: function() { print("r3.run() invoked") }})
51
52// Run 'em - we're passing them through a Thread to make sure they indeed
53// are full-blown Runnables
54function runInThread(r) {
55    var t = new java.lang.Thread(r)
56    t.start()
57    t.join()
58}
59runInThread(r1)
60runInThread(r2)
61runInThread(r3)
62
63// Two class-override classes differ
64print("r1.class !== r2.class: " + (r1.class !== r2.class))
65// instance-override class also differs
66print("r2.class !== r3.class: " + (r2.class !== r3.class))
67
68function checkAbstract(r) {
69    try {
70        r.run()
71        print("Expected to fail!")
72    } catch(e) {
73        print("Got exception: " + e)
74    }
75}
76
77// Check we're hitting UnsupportedOperationException if neither class
78// overrides nor instance overrides are present
79var RAbstract = Java.extend(java.lang.Runnable, {})
80checkAbstract(new RAbstract()) // class override (empty)
81checkAbstract(new (Java.extend(RAbstract))() {}) // class+instance override (empty)
82
83// Check we delegate to superclass if neither class
84// overrides nor instance overrides are present
85var ExtendsList = Java.extend(java.util.ArrayList, {})
86print("(new ExtendsList).size() = " + (new ExtendsList).size())
87print("(new (Java.extend(ExtendsList)){}).size() = " + (new (Java.extend(ExtendsList)){}).size())
88