Can I have a Map of Maps?

[FrankR]

Can I do multiple levels of Maps? In other words, can an element of a map contain - another map?

If I can do this for two levels, would that also work with WriteMap and ReadMap?

 

[LittleEddie]

I don't have time right now, but

Try it.

Make a new App and give it a try, it won't break anything

 

[Erel]

There is no problem with having a map of a map (and additional maps if you want).
WriteMap will convert the inner maps to strings. Then when you load the file it will be a map of strings.

 

[FrankR]

Impressive. Thank you. That makes it very powerful.

 

[FrankR]

I have been able to Load a Map of Maps, and Save it to a file.
I can see it in the file.
When I read the file back and try to access the map of a map with something like

MeterDetailsMap = MeterListMap.Get("ParticularKey")

I get a

java.lang.ClassCastException: java.lang.String

Really stuck.

 

[kickaha]

I have been able to Load a Map of Maps, and Save it to a file.
I can see it in the file.
When I read the file back and try to access the map of a map with something like

MeterDetailsMap = MeterListMap.Get("ParticularKey")

I get a

java.lang.ClassCastException: java.lang.String

Really stuck.

 [From Erels post]WriteMap will convert the inner maps to strings. 
Then when you load the file it will be a map of strings.

So when you do MeterListMap.Get("ParticularKey") it will return a string not a map.

 

[FrankR]

Yeah - he did say that, didn't he. Thanks for pointing that out. I appreciate it.

I guess I was expecting a method to split that string into another map.

I guess I have to go rework all of this ...