| #// Usage: jjs -scripting interface2.js |
| |
| /* |
| * Copyright (c) 2014, 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. |
| */ |
| |
| // Simple example demonstrating how to implement java interface |
| // whose methods are backed by script methods of a script object |
| |
| var ScriptEngineManager = Java.type("javax.script.ScriptEngineManager"); |
| // create manager |
| var manager = new ScriptEngineManager(); |
| // create engine |
| var engine = manager.getEngineByName("js"); |
| |
| // eval code - too many script escapes? |
| // use heredoc ! |
| engine.eval(<<CODE |
| var obj = { |
| run: function() { |
| print("I am run method of 'obj'"); |
| } |
| }; |
| CODE); |
| |
| // create Java interface object whose methods are |
| // implemented by script methods of a script object |
| // This is from javax.script.Invocable. But we are |
| // in JS world, don't worry about types :) |
| |
| var Runnable = Java.type("java.lang.Runnable"); |
| |
| var scriptObj = engine.get("obj"); |
| var r = engine.getInterface(scriptObj, Runnable.class); |
| print(r.class); |
| r.run(); |