Mercurial > jdk8-mips64-public > nashorn / file revision

 /*

  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.

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

  *

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

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

  * published by the Free Software Foundation.

  *

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

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

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

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

  * accompanied this code).

  *

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

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

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

  *

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

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

  * questions.

  */

 /**

  * JDK-8051778: support bind on all Nashorn callables

  *

  * @test

  * @run

  */

 var bind = Function.prototype.bind;

 // Bind a POJO method

 var l = new java.util.ArrayList();

 var l_add_foo = bind.call(l.add, l, "foo");

 l_add_foo();

 print("l=" + l);

 // Bind a BoundCallable

 var l_add = bind.call(l.add, l);

 var l_add_foo2 = bind.call(l_add, null, "foo2");

 l_add_foo2();

 print("l=" + l);

 // Bind a POJO method retrieved from one instance to a different but 

 // compatible instance.

 var l2 = new java.util.ArrayList();

 var l2_size = bind.call(l.size, l2);

 print("l2_size()=" + l2_size());

 // Bind a Java type object (used as a constructor).

 var construct_two = bind.call(java.lang.Integer, null, 2);

 print("Bound Integer(2) constructor: " + new construct_two())

 // Bind a @FunctionalInterface proxying to an object literal. NOTE: the 

 // expected value of this.a is always "original" and never "bound". This

 // might seem counterintuitive, but we are not binding the apply()

 // function of the object literal that defines the BiFunction behaviour,

 // we are binding the SAM proxy object instead, and it is always

 // forwarding to the apply() function with "this" set to the object

 // literal. Basically, binding "this" for SAM proxies is useless; only

 // binding arguments makes sense.

 var f1 = new java.util.function.BiFunction() {

     apply: function(x, y) {

         return "BiFunction with literal: " + this.a + ", " + x + ", " + y;

     },

     a: "unbound"

 };

 print((bind.call(f1, {a: "bound"}))(1, 2))

 print((bind.call(f1, {a: "bound"}, 3))(4))

 print((bind.call(f1, {a: "bound"}, 5, 6))())

 // Bind a @FunctionalInterface proxying to a function. With the same 

 // reasoning as above (binding the proxy vs. binding the JS function), 

 // the value of this.a will always be undefined, and never "bound".

 var f2 = new java.util.function.BiFunction(

     function(x, y) {

         return "BiFunction with function: " + this.a + ", " + x + ", " + y;

     }

 );

 print((bind.call(f2, {a: "bound"}))(7, 8))

 print((bind.call(f2, {a: "bound"}, 9))(10))

 print((bind.call(f2, {a: "bound"}, 11, 12))())