nashorn/samples/jsadapter-fallthrough.js
author xuelei
Thu, 10 Nov 2016 15:46:40 +0000
changeset 43212 5aa719c66677
parent 33005 19c2fe67d821
permissions -rw-r--r--
8168728: DSA signing improvments Reviewed-by: valeriep, vinnie, ahgross, asmotrak, robm

/*
 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// Demonstrate how to provide a default fall-through solution for adapted Java
// objects, forwarding all calls that are not adapted.

var Date = Java.type('java.time.LocalDate')

function wrapDate(d) {
    return new JSAdapter() {
        __call__: function() {
            // adapted (extra) methods
            if (arguments[0] === 'yesterday') {
                return d.minusDays(1)
            }
            // fall-through: forward all other, non-adapted method calls
            var args = [d].concat(Array.prototype.slice.call(arguments, 1)) 
            return Function.call.apply(d[arguments[0]], args)
        }
    }
}

var now = wrapDate(Date.now())

print(now)
print(now.yesterday()) // adapted
print(now.lengthOfMonth()) // fall through to original method
print(now.atTime(23, 42)) // arguments are passed through