Chris: thank you very much: It didn't occured that to me and just tried and
worked fine! Will use this pattern, thanks again. !
On Friday, September 7, 2012 1:05:46 PM UTC-3, Chris Price wrote:
>
> Sebastián: You may already be aware of this, but when I first looked
> into this problem it was a subtlety I had overlooked.
>
> If you have -
>
> interface A { void a();}
> interface B extends A { void b(); }
> interface C extends A { void c(); }
>
> You can't have -
>
> final class BImpl implements B {
> void a() { ... }
> void b() { ... }
> }
> final class CImpl implements C {
> void a() { ... }
> void c() { ... }
> }
>
> Because as has been pointed out "a" would be implemented twice.
> However, you can have -
>
> final abstract class AImpl implements A {
> void a() { ... }
> }
> final abstract class BImpl extends A implements B {
> void b() { ... }
> }
> final abstract class CImpl extends A implements C {
> void c() { ... }
> }
>
> Because in this case "a" is only implemented once.
>
> It may not help but when I was wrapping a third-party lib, I found the
> above pattern worked almost everywhere.
>
> Chris
>
> On Fri, Sep 7, 2012 at 4:53 PM, Alain Ekambi
> <jazzma...@gmail.com<javascript:>>
> wrote:
> > " Your approach however would make this kind of Java API much more
> > confortable to Java users "
> >
> > Is nt it why you are wrapping YUI in the first place ? To make it
> > confortable for Java users ?
> >
> >
> > 2012/9/7 Sebastián Gurin <sebast...@gmail.com <javascript:>>
> >>
> >> Thanks Paul, Nino and Thomas
> >>
> >> Paul: yes I suppose that too, but interfaces do not implement methods,
> so
> >> I thought it is strange.
> >>
> >> Nino: I do not want to make object wrapping as you suggested because I
> >> want my library user's to use the overlay types directly for a
> zero-overhead
> >> API. Your approach however would make this kind of Java API much more
> >> confortable to Java users.
> >>
> >> Thomas, thanks. Yes I'm using .cast() a lot, it is much more
> confortable
> >> than java casting. Also I have designed this YUI java API to be the
> most
> >> similar to the native javascript API. So code using mine YUIGWT will
> look
> >> strange to java programmers, for example, a js literal object
> definition :
> >>
> >> in javascrpt:
> >>
> >> var p = {name: "seba", age: 28}
> >>
> >> in java:
> >> Person p = Person.create().name("seba").age(28);
> >>
> >>
> >> On Thursday, September 6, 2012 3:22:16 PM UTC-3, Sebastián Gurin wrote:
> >>>
> >>> Hi all. I'm writing a lot of GWT overlay types for my new project
> YUIGWT
> >>> - http://code.google.com/p/yuigwt/. I'm creating a nice and rich java
> >>> hierarchy of overlay types there.
> >>>
> >>> Today I discovered that it is not good to let overlay types (extends
> >>> JavaScriptObject implement interfaces because it seems that for a
> certain
> >>> interface, no more than one overlay type can implement its methods.
> The
> >>> error in question is pasted below, but this arrises a big question for
> me:
> >>>
> >>> While I understand perfectly what the error means, I would really
> >>> appreciate if somebody can explain me the reasons behind this nasty
> >>> restriction ? ??
> >>>
> >>> [ERROR] [org.sgx.yuigwt.YuiGwtTestOnline] - Line 9: Only one
> >>> JavaScriptObject type may implement the methods of an interface that
> >>> declared methods. The interface
> (org.sgx.yuigwt.yui.yql.api.YQLQueryResult)
> >>> is implemented by both (org.sgx.yuigwt.yui.yql.api.desc.DescResult)
> and
> >>> (org.sgx.yuigwt.yui.yql.api.wheather.forecast.WheatherForecastResult)
> >>>
> >>> Thanks in advance.
> >>
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