Thu, 20 Nov 2008 18:55:01 +0100 Updates for Page helma.org/wiki/Comparison of JSAdapter and JOMP http://dev.helma.org/wiki/Comparison+of+JSAdapter+and+JOMP/ Tue, 15 Jan 2008 12:27:45 +0100 <div class='diffbody'><table><tr><td style="width:2em; color:#999;">5</td><td>* Inheritance not as <span class='diffremoved'>easy</span><span class='diffadded'>easy as with plain JS objects</span>. Normal use needs wrapped object, but for prototype <span class='diffadded'>use </span>in inheritance chain we need unwrapped adaptee object<span class='diffremoved'>,</span><span class='diffadded'>.</span>&nbsp;<span class='diffremoved'>so </span><span class='diffadded'>As a result </span>we need <span class='diffremoved'>two </span><span class='diffadded'>separate </span>constructors<span class='diffadded'>/factory methods for the wrapped and unwrapped object, or wrap the object manually</span>.<span class='diffadded'>&nbsp;</span></td></tr><tr><td style="width:2em; color:#999;">6</td><td>* getDefaultValue is forwarded to the adaptee object, so a toString() that relies on adapter functionality won't work.<span class='diffadded'> This is rather easy to fix.</span></td></tr><tr><td style="width:2em; color:#999;">9</td><td>* Adds <span class='diffremoved'>a burden </span><span class='diffadded'>overhead </span>to all property access methods of the default JS object.</td></tr><tr><td style="width:2em; color:#999;">10</td><td>* Not thread-safe<span class='diffremoved'>,</span><span class='diffadded'>.</span>&nbsp;<span class='diffremoved'>and making </span><span class='diffadded'>Making </span>it threadsafe <span class='diffremoved'>will </span><span class='diffadded'>would probably require using a java.lang.ThreadLocal to disable the metaobject during invocation, which would </span>put an even bigger <span class='diffremoved'>penalty </span><span class='diffadded'>burden </span>on the default JS object.</td></tr></table></div> http://dev.helma.org/wiki/Comparison+of+JSAdapter+and+JOMP/history.diff?v=4 hannes Tue, 15 Jan 2008 12:21:57 +0100 <div class='diffbody'><table><tr><td style="width:2em; color:#999;">1</td><td>This is a comparison of *JSAdapter<span class='diffadded'>|http://blogs.sun.com/sundararajan/entry/self_javascript_and_jsadapter</span>* and *JOMP<span class='diffadded'>|http://www.bias2build.com/thesis/javascript_mop_expanded.html</span>*, two approaches to add metaprogramming features to Rhino.</td></tr></table></div> http://dev.helma.org/wiki/Comparison+of+JSAdapter+and+JOMP/history.diff?v=3 hannes Tue, 15 Jan 2008 12:18:36 +0100 <div class='diffbody'><table><tr><td style="width:2em; color:#999;">11</td><td>* Not thread-safe, and making it threadsafe will put <span class='diffremoved'>a burden </span><span class='diffadded'>an even bigger penalty </span>on the default JS object.</td></tr></table></div> http://dev.helma.org/wiki/Comparison+of+JSAdapter+and+JOMP/history.diff?v=2 hannes Tue, 15 Jan 2008 12:16:41 +0100 <ul class='diffproperties'><li>Set <span class='diffpropname'>tags</span> to <span class='diffadded'>metaprogramming</span></li></ul><div class='diffbody'><table><tr><td style="width:2em; color:#999;">1</td><td><span class='diffadded'>This is a comparison of *JSAdapter* and *JOMP*, two approaches to add metaprogramming features to Rhino.</span></td></tr><tr><td style="width:2em; color:#999;">3</td><td><span class='diffadded'>=== JSAdapter</span></td></tr><tr><td style="width:2em; color:#999;">4</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">5</td><td><span class='diffadded'>* Inheritance not as easy. Normal use needs wrapped object, but for prototype in inheritance chain we need unwrapped adaptee object, so we need two constructors.</span></td></tr><tr><td style="width:2em; color:#999;">6</td><td><span class='diffadded'>* getDefaultValue is forwarded to the adaptee object, so a toString() that relies on adapter functionality won't work.</span></td></tr><tr><td style="width:2em; color:#999;">7</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">8</td><td><span class='diffadded'>=== JOMP</span></td></tr><tr><td style="width:2em; color:#999;">9</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">10</td><td><span class='diffadded'>* Adds a burden to all property access methods of the default JS object.</span></td></tr><tr><td style="width:2em; color:#999;">11</td><td><span class='diffadded'>* Not thread-safe, and making it threadsafe will put a burden on the default JS object.</span></td></tr><tr><td style="width:2em; color:#999;">12</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">13</td><td><span class='diffadded'>=== Test code</span></td></tr><tr><td style="width:2em; color:#999;">14</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">15</td><td><span class='diffadded'>This is a script that implements a base and extended object using both techniques, and a patch for adding JOMP support to Rhino.</span></td></tr><tr><td style="width:2em; color:#999;">16</td><td><span class='diffadded'></span></td></tr><tr><td style="width:2em; color:#999;">17</td><td><span class='diffadded'>&lt;% this.attachments %&gt;</span></td></tr></table></div> http://dev.helma.org/wiki/Comparison+of+JSAdapter+and+JOMP/history.diff?v=1 hannes