Monkey patching a Java class?
sundararajan.athijegannathan at oracle.com
Fri May 2 04:23:32 UTC 2014
No, you can't add/remove a method (or public field) of a Java class to
use within the script. You could subclass and expose that subclass as
var oldFile = java.io.File;
java.io.File = Java.extend(oldFile, ...)
But, I'd not recommend it - besides user can still get original
java.io.File via Java.type (unless you do similar hack on Java.type as
Cleaner approach is to expose a script API wrapping java.io.File.
On Thursday 17 April 2014 12:03 AM, HRJet wrote:
> For example, I want to add a convenience method to java.io.File class, say
> instance of java.io.File. Note that the file instance may be created by
> some third-party code, over which I have no control.
> In Java land, this seems to be usually done with CGLib or AspectJ, etc.
> I was wondering if nashorn had some trick up its sleeve for doing this in
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