Accessing java Maps & Lists as JavaScript Objects in Rhino

java json rhino
Gary picture Gary · May 18, 2011 · Viewed 9.8k times · Source

Is there a way to access Java Maps and Lists as JavaScript Objects in Rhino?

I have a Map which contains only other maps and lists of primitives and Strings, I'd like to pass this to a Rhino script and do stuff to it, and return the modified object back out to Java - but since they are java.util.Map and java.util.List Objects, I can't use standard JavaScript associative array syntax. ie: fooMap.get("keyName") will work, but fooMap.keyName and fooMap["keyName"] will not.

I don't know if there is a Rhino-specific way to do this, or if there is some conversion/cast utility that will help. Commons BeanUtils is not sufficient, because to convert a Map to a bean (which can be accessed via associative array syntax), you must first create a class which has all of the named mutators/accessors. I won't know the structure of the object at runtime.

Answer

Grooveek picture Grooveek · May 18, 2011

Take a look at RingoJS. It has convenient wrappers for list and map for Rhino such as this one

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