javaextend.js revision 22:2a5c2258827b 
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.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 */
23
24/**
25 * @test
26 * @run
27 */
28
29function model(n) {
30  return Java.type("jdk.nashorn.internal.test.models." + n)
31}
32
33// Can't extend a final class
34try {
35    Java.extend(model("FinalClass"))
36} catch(e) {
37    print(e)
38}
39
40// Can't extend a class with no public or protected constructor
41try {
42    Java.extend(model("NoAccessibleConstructorClass"))
43} catch(e) {
44    print(e)
45}
46
47// Can't extend a non-public class
48try {
49    Java.extend(model("NonPublicClass"))
50} catch(e) {
51    print(e)
52}
53
54// Make sure we can implement interfaces from the unnamed package
55var c = new (Java.extend(Java.type("UnnamedPackageTestCallback")))() { call: function(s) { return s + s } }
56print(c.call("abcd"))
57
58// Basic Runnable from an object
59new (Java.extend(java.lang.Runnable))({ run: function() { print("run-object") } }).run()
60
61// Basic Runnable from a function
62new (Java.extend(java.lang.Runnable))(function() { print("run-fn") }).run()
63
64// Basic Runnable from an autoconverted function
65var t = new java.lang.Thread(function() { print("run-fn-autoconvert") })
66t.start()
67t.join()
68
69// SAM conversion should work on overloaded methods of same name
70var os = new (Java.extend(model("OverloadedSam")))(function(s1, s2) { print("overloaded-sam: " + s1 + ", " + s2) })
71os.sam("x")
72os.sam("x", "y")
73
74// Test overriding of hashCode, equals, and toString
75var oo = Java.extend(model("OverrideObject"))
76// First, see non-overridden values
77print("oo-plain-hashCode: " + (new oo({})).hashCode())
78print("oo-plain-toString: " + (new oo({})).toString())
79print("oo-plain-equals  : " + (new oo({})).equals({}))
80// Now, override them
81print("oo-overridden-hashCode: " + (new oo({ hashCode: function() { return 6 }})).hashCode())
82print("oo-overridden-toString: " + (new oo({ toString: function() { return "override-object-overriden" }})).toString())
83print("oo-overridden-equals  : " + (new oo({ equals: function() { return true }})).equals({}))
84// Finally, test that equals and hashCode can be overridden with functions from a prototype, but toString() can't:
85function Proto() {
86    return this;
87}
88Proto.prototype = {
89    toString: function() { return "this-will-never-be-seen" }, // toString only overridden when it's own property, never from prototype
90    equals: function() { return true },
91    hashCode: function() { return 7 }
92}
93print("oo-proto-overridden-hashCode: " + (new oo(new Proto())).hashCode())
94print("oo-proto-overridden-toString: " + (new oo(new Proto())).toString())
95print("oo-proto-overridden-equals  : " + (new oo(new Proto())).equals({}))
96
97// Subclass a class with a protected constructor, and one that takes
98// additional constructor arguments (a token). Also demonstrates how can
99// you access the Java adapter instance from the script (just store it in the
100// scope, in this example, "cwa") to retrieve the token later on.
101var cwa = new (Java.extend(model("ConstructorWithArgument")))("cwa-token", function() { print(cwa.token) })
102cwa.doSomething()
103
104// Do the same thing with proprietary syntax and object literal
105var cwa2 = new (model("ConstructorWithArgument"))("cwa2-token") { doSomething: function() { print("cwa2-" + cwa2.token ) } }
106cwa2.doSomething()
107