I followed with JsInterop and implement a basic version of Promise (not
full implemented).
The code is here:
1)
https://github.com/workingflows/gwt-jscore/tree/master/src/main/java/com/workingflows/js/jscore/client/api/promise
<https://github.com/workingflows/gwt-jscore/tree/master/src/main/java/com/workingflows/js/jscore/client/api/promise>
(Promise
API)
2)
https://github.com/workingflows/gwt-jscore/tree/master/src/main/java/com/workingflows/js/jscore/client/factory
(Factory API)
I found some things, for example:
Promise has the "catch" method, and this is a reserved word in Java.
Then, on the interface that represents Promise, can not be put this method.
Perhaps, there could be a JsAlias for functions:
@JsType(isNative = true, prototype = "Promise")
public interface Promise {
Promise then(PromiseThenFn f, PromiseThenFn error);
@JsAlias(value="catch")
Promise catchError(PromiseThenFn error);
}
Another annoying thing is the management function as a parameter, for
example:
In JS:
var p = new Promise (function (resolved, rejected) {...});
In Java I emulated it this way, and if not the best:
@JsType
public interface PromiseFn {
void f(Resolve resolve, Rejected rejected);
}
// In JS Class Factory
public static native PromiseFn Function(PromiseFn fn) /*-{
return function(resolve, rejected){
fn.f(resolve, rejected);
}
}-*/;
And use this:
final Promise p3 = Browser.newPromise(JS.Function(new PromiseFn() {
@Override
public void f(Resolve resolve, Rejected rejected) {
resolve.resolve("Resolve Promise P3");
}
}));
I do not know if they are working in a cleaner way to work with functions
to JS style.
Example Usage of Promise:
Promise p1 = Browser.newPromise(JS.Function(new PromiseFn() {
@Override
public void f(Resolve resolve, Rejected rejected) {
resolve.resolve("Resolve Promise P1");
}
}));
p1.then(
JS.Function(
new PromiseThenFn() {
@Override
public Promise f(final Object changed) {
Browser.getWindow().getConsole().log("Promise Complete: " +
changed);
return Browser.newPromise(JS.Function(new PromiseFn() {
@Override
public void f(Resolve resolve, Rejected rejected) {
resolve.resolve(changed + " > Other Promise");
}
}));
}
}), JS.Function(
new PromiseThenFn() {
@Override
public Promise f(final Object changed) {
Browser.getWindow().getConsole().log("Promise with Error: "
+ changed);
return Browser.newPromise(JS.Function(new PromiseFn() {
@Override
public void f(Resolve resolve, Rejected rejected) {
rejected.rejected(changed + " > Other With Error
Promise");
}
}));
}
})
).then(
JS.Function(
new PromiseThenFn() {
@Override
public Promise f(final Object changed) {
Browser.getWindow().getConsole().log("Promise Complete:
" + changed);
return null;
}
}),
JS.Function(
new PromiseThenFn() {
@Override
public Promise f(Object changed) {
Browser.getWindow().getConsole().log("Promise with Error:
" + changed);
return null;
}
})
);
The Result:
["Promise Complete: Resolve Promise P1", cZ: ph, cM: Object, tM: function,
__elementTypeId$: 1, __elementTypeCategory$: 3]
["Promise Complete: Resolve Promise P1 > Other Promise", cZ: ph, cM: Object
, tM: function, __elementTypeId$: 1, __elementTypeCategory$: 3]
Thanks and hope to suggestions.
El jueves, 21 de agosto de 2014 13:33:38 UTC-3, Goktug Gokdogan escribió:
>
>
>
>
> On Thu, Aug 21, 2014 at 5:29 AM, Cristian Rinaldi <[email protected]
> <javascript:>> wrote:
>
>> Thanks +Goktug Gokdogan for response.
>>
>> APT is very good option and java 8 support for GWT 3.0 would be a amazing
>> thing.
>> You have a planning for Elemental 2.0 or initial documentation to share,
>> to how you plan address the desing?
>>
>>
> Nothing planned yet other than the plan to work on it :) My anticipation
> is. initially we will auto generate JsTyped DOM, deal with problems and
> incrementally improve it.
>
>
>> El miércoles, 20 de agosto de 2014 16:38:31 UTC-3, Goktug Gokdogan
>> escribió:
>>
>>>
>>>
>>>
>>> On Wed, Aug 20, 2014 at 6:17 AM, Cristian Rinaldi <[email protected]>
>>> wrote:
>>>
>>>> Community:
>>>> I'm playing with JsInterop , and I have two questions:
>>>>
>>>> 1) Are you planning to try the static methods of JS objects, such
>>>> as Object, Promise, etc.?
>>>>
>>>
>>>
>>> There will be some static helpers provided from the SDK. I originally
>>> started the JSNI 2.0 document but it is basically waiting for me to start
>>> on Elemental 2.0 and accumulate more experience to turn it into something
>>> more concrete.
>>>
>>>
>>>
>>>> 2) How do when an instance is mapped to an existing Object, eg
>>>> Promise, has a constructor with parameters?
>>>>
>>>>
>>>
>>> Actually I have new ideas on this derived from how some other APTs work.
>>>
>>> I need to update the JsInterop doc but these are the options that I'm
>>> thinking right now:
>>>
>>> *Option 1 (works better for extending):*
>>>
>>> @JsType(prototype = "Promise")public interface Promise {
>>> /* Protoype_Promise is an autogenerated package visible class */
>>> public static class Prototype extends Protoype_Promise {
>>> public Prototype(Function... functions) {
>>> super(functions);
>>> }
>>> }
>>>
>>> void then(Function f);
>>>
>>> void cath(Function f);
>>> }
>>>
>>>
>>>
>>> *Option 2 (works better for general use):*
>>>
>>> @JsType(prototype = "Promise")public interface Promise {
>>> /* Protoype_Promise is an autogenerated package visible class */
>>> public static Promise create(Function... functions) {
>>> return new Protoype_Promise(functions);
>>> }
>>>
>>> void then(Function f);
>>>
>>> void cath(Function f);
>>> }
>>>
>>>
>>>
>>> *Of course one can do both:*
>>>
>>> @JsType(prototype = "Promise")public interface Promise {
>>>
>>> public static class Prototype extends Protoype_Promise {
>>> public Prototype(Function... functions) {
>>> super(functions);
>>> }
>>> }
>>>
>>> public static Promise create(Function... functions) {
>>> return new Prototype(functions);
>>> }
>>>
>>> void then(Function f);
>>>
>>> void cath(Function f);
>>> }
>>>
>>>
>>>
>>>
>>>> Currently to resolve this 1) I created the following class Factory:
>>>> JS
>>>> <https://github.com/workingflows/gwt-jscore/blob/master/src/main/java/com/workingflows/js/jscore/client/factory/JS.java>
>>>>
>>>> But the interfaces define a contract at the level instance of a
>>>> class or object, this way of doing things, I do not know if it is
>>>> semantically correct.
>>>>
>>>> To solve 2) there are not many options:
>>>>
>>>> Create a Factory that returns an instance of the object, because
>>>> it has no meaning, only to make the new, implement the interface, because
>>>> the compiler already does.
>>>> There is some progress in this?
>>>>
>>>> I saw in one of the post a proposal to do something like this:
>>>>
>>>> Promise Promise.Prototype p = new (new Function ....., new
>>>> Function ....);
>>>>
>>>> Where Promise, is the interface defined with prototype = "Promise".
>>>>
>>>> @JsType(isNative = true, prototype = "Promise")
>>>> public interface Promise {
>>>>
>>>> void then(Function f);
>>>>
>>>> void cath(Function f);
>>>> }
>>>>
>>>> Here 'access to jsCore project:
>>>>
>>>> https://github.com/workingflows/gwt-jscore/
>>>> <https://github.com/workingflows/gwt-jscore/>
>>>>
>>>>
>>> Great work. This kind of stuff is also very valuable as a feedback.
>>>
>>>
>>>> I hope the answers ...
>>>>
>>>> greetings
>>>>
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>>>> For more options, visit https://groups.google.com/d/optout.
>>>>
>>>
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>>
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>
>
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