diff -r e4de5829b493 -r 19c2fe67d821 nashorn/samples/jsadapter-fallthrough.js --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/nashorn/samples/jsadapter-fallthrough.js Mon Oct 12 13:36:41 2015 +0200 @@ -0,0 +1,57 @@ +/* + * 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 +