Hi Jörg, We have currently no plans to make Object.prototype.hasOwnProperty on non-JavaScript objects. However, I recently pushed a change that makes the in-operator work with Java objects, maps, lists, and arrays to JDK 9.
https://bugs.openjdk.java.net/browse/JDK-8173480 Hannes > Am 02.02.2017 um 16:28 schrieb Frantzius, Jörg <joerg.frantz...@aperto.com>: > > Hi, > > Nashorn’s extensions let Java Map objects behave somewhat like Javascript > objects by making its key-values accessible as object properties. > > Unfortunately, it seems that hasOwnProperty() is commonly used in Javascript > code to iterate the properties of an object, and this doesn’t work on Map > objects. Maybe it would be a good idea to also support hasOwnProperty() on > Map objects? > > Currently it seems impossible to let 3d party Javascript code traverse a a > Java object graph with nested Map objects. While I may be able to traverse > and convert a Java object graph if it is made from Collections, Arrays and > Maps, this will fail as soon as there is a custom Java class involved that > has a Map field (that is accessed from Javascript). > > Thanks for any thoughts, > Jörg > > > --- > > Dipl. Inf. Jörg von Frantzius, Technical Director > > E-Mail joerg.frantz...@aperto.com > > Phone +49 30 283921-318 > Fax +49 30 283921-29 > > Aperto GmbH – An IBM Company > Chausseestraße 5, D-10115 Berlin > http://www.aperto.com<http://www.aperto.de/> > http://www.facebook.com/aperto > https://www.xing.com/companies/apertoag > > HRB 77049 B, AG Berlin Charlottenburg > Geschäftsführer: Dirk Buddensiek, Kai Großmann, Stephan Haagen, Daniel Simon >
