Hi Sundar, Thanks for the pointer. Dynalink does indeed look like the right tool, albeit quite a lot of work for a small project. Maybe I'll experiment if I have time. I wonder if you've looked at a way to integrate Dynalink with Graal/Truffle as it seems they have quite similar concepts of a high level object model with get/set "messages" etc. It'd be nice if the two mechanisms were compatible.
"Expando" is Internet Explorer terminology for a natively implemented object that has extra properties set on it from JS. I think to implement expandos with this scheme, I'd need to write a custom linker that maintains an IdentityHashMap<Object, HashMap<String, Object>> and then catches the right exception in handling property sets from the next linker in the chain. If the bean linker can't handle the set because there's no such property, I'd insert the property into the hashmaps. I'd also check those first before delegating to the bean linker when handling gets. That could be quite some fancy method handle logic! On Mon, Mar 19, 2018 at 23:52:44, Sundararajan Athijegannathan< sundararajan.athijegannat...@oracle.com>wrote: > Hi, > > Haven't gone through the referred code. Do you want to add more properties > to a Java object apart from "bean properties" inferred? > > If so, you can write your own dynalink linker with jdk9. > > See also: > > API doc: > > https://docs.oracle.com/javase/9/docs/api/jdk.dynalink-summary.html > > Sample: > > http://hg.openjdk.java.net/jdk9/dev/nashorn/file/17cc754c8936/samples/ > dynalink/DOMLinkerExporter.java http://hg.openjdk.java.net/jdk9/dev/ > nashorn/file/17cc754c8936/samples/dynalink/dom_linker_gutenberg.js http:// > hg.openjdk.java.net/jdk9/dev/nashorn/file/17cc754c8936/samples/dynalink/ > dom_linker.js > > Hope this helps, > -Sundar > > On 19/03/18, 7:50 PM, Mike Hearn wrote: > > Hello, > > Thanks for writing Nashorn, it's useful! > > I'm trying to run https://github.com/domchristie/turndown in Nashorn, > using JSoup to provide a simple DOM, but have hit an issue because Turndown > expects to be able to add its own properties to DOM objects. This is > something browsers support but Nashorn doesn't. I do realise that Nashorn's > approach is allowed by the specs, but I'm wondering if there's any way to > hack things up such that the library can do what it wants. I can also just > change the code, but I'm curious if there's a quick fix here. > >
