Re: JsInterop and Java collections?

Kirrill,

I did not suggest to *convert*, but *map*. That means that if/when a JSInter-oped class is exported into the JS Engine (let's say V8) , the JS developer will see plain old js arrays, so s/he can work with them as they have been for ages. When Java/JsInterop developers work with the same structure, they can chose to view it as java.util.ArrayList, java array or some other java.util.Collection, thus using familiar Java APIs. It is the same structure in the JS Engine memory, but viewed differently. But no conversion involved.

On Monday, June 6, 2016 at 9:36:00 AM UTC-7, Kirill Prazdnikov wrote:

Let me try to explain the issue better:

All we need is the JsInterop to map  an List (or Java array) from the Java world into plain array in the JavaScript world. Transparently.

I do not agree.  About transparency. Conversion form Java List (see Linked list)to plain Js array is a serious performance and garbage operation. 

You have to create a new array on JS side and iterate the list and copy its values to the array. 

Instead of that you may expose any interface to JS from java using new JsInterop. And use the interface in JS side. 

What about the fact that  Java list contains (T extends java.lang.Object). What will you do with Java-kind objects in JS world ? 

 

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