How to retrieve a ArrayList from C# to java Call

[AkIberdrola]

Hi Pavel

Thanks a ton for building this tool. Its totally awesome. I need your
help .I have a C# program that sends a ArrayList containing a c sharp
class objects ( say a list of Test objects).

The Java program on the receiving end calls this method and receives
the Object. But i can not typecast the Object return type to a List or
ArrayList type in java..

See below my code. and the error message.

Bridge.init();
File file = new File("C:\\PI-WTJavaWorkSpace1.0\\JavaPIWTInterface\\lib
\\PiToWTJNI.j4n.dll");
Bridge.LoadAndRegisterAssemblyFrom(file);

List arrayList = new ArrayList();
IPiToWTJNI db = new PiToWTJNI();

arrayList = db.getPIData("MV90.PLV.MWHDEL");
System.out.printf("This is the object retured"+arrayList.size());

When i execute i get the following error....

java.lang.ClassCastException: system.collections.__IList cannot be
cast to java.util.List
at
com.iberdrola.piwtreconn.jininterface.PIJNIInterface.main(PIJNIInterface.java:
33)

Can you help ?

Thanks
Akila.

[Pavel Šavara]

Without too much thinking:
you confuse java.util.List with System.Collection.IList.
Try this

system.collections.IList list = db.getPIData("MV90.PLV.MWHDEL");
System.out.printf("This is the object retured"+list.getCount());

I didn't compiled/tested that ;-)

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[Amine Chaari]

Another suggestions please! Any help?

[Amine Chaari]

I have used System.Collections.IList like this: system.collections.IList list = ara.DisplayAllDocuments();

 and that's fine. But in Java how can I access to an element  of  my list?

Thank you.

[Pavel Šavara]

Call the methods it has.

https://github.com/jni4net/jni4net/blob/master/jni4net.j/src/main/java/system/collections/IList.java

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[Amine Chaari]

thank you for your response but no one of methods in IList.java let me access to an element in my list.

I want to access to my list's elements because i want to display data in Jtable Swing.

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[Pavel Šavara]

GetItem is the one you need.

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[Amine Chaari]

when i apply getItem, i can't access to proporties and methods of my Class.

There is the code in C#:

IList<ArasDocument> docs = ara.DisplayAllDocuments();

            for(int i=0;i<docs.Count;i++)

                   {

                docs[i].ShowDocs();

                    }

and there is the code in Java:

Thank you!

[Pavel Šavara]

you need proxygen to generate the (java) proxy of the data type inside of the list. 

Then you cast each item to the java proxy type via Bridge.cast().

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[Amine Chaari]

Sorry,i don't understand very much. Can you develop more?

Thanks!

[Amine Chaari]

Should the Name of the Class be the 2nd parameter of the Bridge.Cast ?

Object test= docs.getItem(i);

ArasDocument a = Bridge.cast(test,ArasDocument);

Because I have an error on it: cannot find symbol

  symbol:   variable ArasDocument