I have a base class for drag and drop logic which looks something like this
public abstract class FileDropHandler<FileT> extends InputClientAdapter {
// here we have some common UI logic and constuctor
// and the following methods are platform specific:
protected abstract int length(FileT arrayBuffer);
protected abstract Async<String> doUpload(FileT arrayBuffer);
protected abstract void processFile(DropEvent<?> dropEvent, MouseEvent
mouseEvent);
protected abstract ObjectFactory[] loadObjects(String file, FileT
arrayBuffer);
}
So in case of web, FileT is ArrayBuffer which I get form dropEvent.file, which
is a web File type used in drag events.
public class FileDropHandlerGwt extends FileDropHandler<ArrayBuffer> { ... };
For JVM version I have regular files so I use java.io.File for the template
argument.
public class FileDropHandlerJvm extends FileDropHandler<File> { ... };
And this does not work for me.
As a workaround I currently have a class container for ArrayBuffer like
static class ArrayBufferContainer { public final ArrayBuffer buffer; };
which I use for template argument currently.
I think that there is a way to use ArrayBuffer directly, But I have not found a
way to do that.
In order to understand GWT and understand JS-interop I`m asking this here.
Thanks
-Kirill
вторник, 22 августа 2017 г., 15:13:46 UTC+3 пользователь Vassilis Virvilis
написал:
>
> Kirill,
>
> I am out of suggestions for but my curiosity drives me crazy.
>
> What are you trying to do in java terms? For example:
>
>
> - Are you try to return an ArrayBuffer from a function: public <T> T
> getBuffer();
> - Are you try to pass an ArrayBuffer as a parameter: public <T> void
> sendBuffer(T buffer);
> - Are you try to put the ArrayBuffer in a List, Array, Set?
> - Something else?
>
> I looked but I didn't find in the thread the description of the java
> caller that throws the exception.
>
>
> On Tue, Aug 22, 2017 at 3:04 PM, Kirill Prazdnikov <[email protected]
> <javascript:>> wrote:
>
>> Sorry, copypaster error, here is the fixed
>>
>> getType(buffer) = [object ArrayBuffer]
>> typeOf(buffer) = object
>>
>>
>> вторник, 22 августа 2017 г., 15:02:49 UTC+3 пользователь Kirill
>> Prazdnikov написал:
>>
>>> Here it is:
>>>
>>> getType(buffer) = [object ArrayBuffer]
>>> typeOf(buffer) = [object ArrayBuffer]
>>>
>>> private native String getType(Object x) /*-{
>>> return Object.prototype.toString.call(x);
>>> }-*/;
>>>
>>> private native String typeOf(Object x) /*-{
>>> return typeof x;
>>> }-*/;
>>>
>>>
>>>
>>> понедельник, 21 августа 2017 г., 21:47:37 UTC+3 пользователь Tony
>>> BenBrahim написал:
>>>>
>>>> Take the object you get back from the file reader and run it through
>>>> the JSNI method below and GWT,log the result. .Let's see if it really
>>>> is an ArrayBuffer.(I would note the FileReader result is sometimes a
>>>> String
>>>> and sometimes an ArrayBuffer).
>>>>
>>>> private native String getType(Object x)/*-{
>>>> return Object.prototype.toString.call(x);
>>>> }-*/
>>>>
>>>>
>>>>
>>>
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