Hi
@Pablo, I don't see how the example you gave relates to arrays and jsinterop
@Thomas
I am not exactly sure about but looks like that String[] is an array of
char arrays instead of native javascript Strings. For example this also
works.
config.buttons = new JsString[] {Util.getString("copyHtml5")};
Where JsString and Util.getString are:
@JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "String")
public static interface JsString {
}
public static native JsString getString(String string) /*-{
var l = string.length;
var s = "";
for (var i = 0; i < l; i++) {
s += string[i];
}
return s;
}-*/;
Thanks in advance.
On Thu, May 12, 2016 at 2:46 PM, Pablo Nussembaum <[email protected]> wrote:
> Hi Vassilis,
> I have been using JsInterop for managing IndexedDB stores and I have
> created this [1] helper class for casting back and forth js to java. The
> main issue is that in GWT there are two Object hiearchies one from java and
> js, GWT makes are really job hiding that detail, but with JsInterop the
> difference leaks ;-)
>
> [1]
> https://github.com/bauna/gwt-indexeddb/blob/devel/gwt-indexeddb-core/src/main/java/org/nuvola/indexeddb/client/JsInteropHelper.java
>
> Let me know if want examples where I'm using this helper class.
>
> Regards,
> --
> Pablo
>
>
> On 12/05/16 07:43, Vassilis Virvilis wrote:
>
> Thanks for all the answers
>
> The Collection#toArray does not work in my case because dataTables.net are
> a bit sensitive in the input. It stumbles upon java.lang stuff later on.
> Here
>
>> buttons = new String[] {"copyHtml5"};
>>>
>> while buttons2 is the correct one created with your previous suggestion.
>
> 1. buttons:
> 1. 0:"copyHtml5"
> 2. __elementTypeCategory$:6
> 3. __elementTypeId$:2
> 4. java_lang_Object__1_1_1clazz:java_lang_Class_Class__V
> 5. java_lang_Object_castableTypeMap:Object
> 6. java_lang_Object_typeMarker:
> com_google_gwt_lang_Runtime_typeMarkerFn__V()
> 7. length:1
> 8. __proto__:Array[0]
> 2. buttons2:Array[1]
> 1. 0:"copyHtml5"
> 2. length:1
> 3. __proto__:Array[0]
>
> About Array vs []
> I am not js expert and looking for the difference I hit this
> http://stackoverflow.com/questions/931872/what-s-the-difference-between-array-and-while-declaring-a-javascript-ar
> Check this answer
> http://stackoverflow.com/questions/931872/what-s-the-difference-between-array-and-while-declaring-a-javascript-ar/1273936#1273936
>
> So I though if that could work with GWT and I tried it.
>
> Also thanks for the link I bookmarked it.
>
>
> On Thu, May 12, 2016 at 1:20 PM, Thomas Broyer <[email protected]> wrote:
>
>>
>>
>> On Thursday, May 12, 2016 at 11:51:11 AM UTC+2, Vassilis Virvilis wrote:
>>>
>>> Thomas thanks,
>>>
>>> Wow I did this and it works. But it is crazy. Cr is for crazy. Kudos to
>>> jsinterop guys though.
>>>
>>> @JsType(isNative = true, namespace = JsPackage.GLOBAL, name = "[]")
>>>
>>>
>> You should probably use "Array" rather than "[]"
>>
>>
>>> public interface CrJsArray<T> {
>>>
>>> public void push(T value);
>>>
>>> @JsProperty
>>> public int getLength();
>>> }
>>>
>>>
>>> I tried your suggestion to cast and __also works__ (eclipse complains
>>> about but with (JavaScriptObject) (Object) my_native_object) it works and
>>> it is definitely better.
>>>
>>
>> Also, for converting from a java.util.Collection to an array, how about
>> simply using Collection#toArray? (and then passing the array to JS through
>> JsInterop)
>>
>>
>>> Questions
>>> 1) Is JavaScriptObject scheduled for deprecation?
>>>
>>
>> Yes, it'll be replaced with JsInterop.
>>
>>
>>> 2) Should a native type be able to extend JavascriptObject. Because
>>> right now (2.8pre1) fails at run time. That would make casting a bit saner.
>>> Should I report it somewhere?
>>>
>>
>> This is probably on-purpose.
>>
>>
>>> I tried to look for the reference you gave but I didn't find it. Wrong
>>> keywords maybe...
>>>
>>
>> I found this:
>> https://groups.google.com/d/topic/google-web-toolkit/nmBAOX4vcSo/discussion
>> Not exactly what I remembered, but touches similar points.
>>
>>
>>>
>>> On Thu, May 12, 2016 at 12:20 PM, Thomas Broyer < <[email protected]>
>>> [email protected]> wrote:
>>>
>>>> That question came up already in the forum or in GWT-Contrib (try to
>>>> search the archive), and I seem to recall that Goktug said you could cast
>>>> @JsType(isNative=true) objects to/from JavaScriptObject, so you could use
>>>> JsArray (and JsonUtils.safeEval). I think you can also cast to/from an
>>>> array of @JsType(isNative=true), so if you don't need to alter the size of
>>>> the JS array you can then use the bracket operators on a Java array (and
>>>> cast from/to a JavaScriptObject).
>>>> This is only out of memory, please double check from the forum
>>>> archives.
>>>>
>>>>
>>>> On Thursday, May 12, 2016 at 10:47:51 AM UTC+2, Vassilis Virvilis
>>>> wrote:
>>>>>
>>>>> Hi again,
>>>>>
>>>>> I am trying to convert a jre collection or build a jsArray with a
>>>>> isNative=true type.
>>>>>
>>>>> Unfortunately this is not possible because JsArray requires
>>>>> JavascriptObject which is invcompatible (complie time error) with native
>>>>> classes.
>>>>>
>>>>> Any ideas?
>>>>>
>>>>> I looked on deep dive jsinterop from Ray Cromwell and it says that
>>>>> there is not a clean way for jsinterop1 to align collections. Ok I get
>>>>> that
>>>>> - but there must be a way even if not the nicest/cleanest one.
>>>>>
>>>>> Otherwise looks like I have to create my own @jsinteroped MyJsArray
>>>>> which looks wrong.
>>>>>
>>>>> --
>>>>> Vassilis Virvilis
>>>>>
>>>> --
>>>> You received this message because you are subscribed to the Google
>>>> Groups "GWT Users" group.
>>>> To unsubscribe from this group and stop receiving emails from it, send
>>>> an email to [email protected].
>>>> To post to this group, send email to
>>>> <[email protected]>
>>>> [email protected].
>>>> Visit this group at
>>>> <https://groups.google.com/group/google-web-toolkit>
>>>> https://groups.google.com/group/google-web-toolkit.
>>>> For more options, visit <https://groups.google.com/d/optout>
>>>> https://groups.google.com/d/optout.
>>>>
>>>
>>>
>>>
>>> --
>>> Vassilis Virvilis
>>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "GWT Users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to [email protected].
>> To post to this group, send email to
>> <[email protected]>[email protected].
>> Visit this group at https://groups.google.com/group/google-web-toolkit.
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
> --
> Vassilis Virvilis
> --
> You received this message because you are subscribed to the Google Groups
> "GWT Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> To post to this group, send email to [email protected].
> Visit this group at https://groups.google.com/group/google-web-toolkit.
> For more options, visit https://groups.google.com/d/optout.
>
>
> --
> You received this message because you are subscribed to the Google Groups
> "GWT Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to [email protected].
> To post to this group, send email to [email protected].
> Visit this group at https://groups.google.com/group/google-web-toolkit.
> For more options, visit https://groups.google.com/d/optout.
>
--
Vassilis Virvilis
--
You received this message because you are subscribed to the Google Groups "GWT
Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at https://groups.google.com/group/google-web-toolkit.
For more options, visit https://groups.google.com/d/optout.
