How to use PropertyUtils to get an element from a list inside a map?

apache-commons-beanutils, indexed-properties, java

Solution

Ok, so I figured it out. The code below works like how I wanted:

PropertyUtils.getProperty(map, "(aList)[1]");

I think, based on this documentation, what I'm doing here is that I'm specifying that `aList` is a key and not an indexed property of the bean. Something like that.

Problem

I've been trying to use the indexed notation used for getProperty of PropertyUtils to retrieve an element in a list contained as a map value. Here's an example (I'm using a general syntax here): ``` map = {"aList": ["elem1", "elem2", "elem3"]} ``` Let say, I want to get the value "elem2", I'm trying to do it using: ``` PropertyUtils.getProperty(map, "aList[1]"); ``` but it doesn't seem to work. I always get a null value. Is there another way to do this. To be clear, I know I can do a `getProperty("aList").get(0)` (after explicitly casting, of course) but I'm working on a solution that needs the code stated above to work.

Original source