How to use Gin DI in custom ConstraintValidator (Bean Validation)?
For example i have some CodeValidator with dependencies.
public class ExistingCustomsCodeValidator implements
ConstraintValidatorExistingCustomsCode, String {
@Inject private CustomsCodeService customsCodeService;
@Inject private ProcessingCtx processingCtx;
@Override public void initialize(ExistingCustomsCode
constraintAnnotation) {}
@Override public boolean isValid(String value,
ConstraintValidatorContext context) {
return customsCodeService.isValid(value,
processingCtx.getDeclarationDateTime());
}
}
I can simply inject dependencies on server-side, but i can't imagine how to
do this on client-side.
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Re: how to use GIN ?
Thomas gives very good advice, although I personally never use the
@ImplementedBy annotation (not entirely sure why...).
To complement his answer, if you're interested in saving the
addClickHandler call you may want to take a look at UiBinder the
@UiHandler annotation.
On Jun 27, 3:41 pm, Thomas Broyer t.bro...@gmail.com wrote:
On 27 juin, 19:39, yves yves.ko...@gmail.com wrote:
Olivier,
Thanks for the link.
If I try to summarize my problem : Which are the conventions that are
implicitly used by GIN to bind classes ?
I've already seen gwt-presenter, but it didn't helped me to understand
how to transform my code to such code :
public class AppModule extends AbstractGinModule {
@Override
protected void configure() {
bind(EventBus.class).to(DefaultEventBus.class);
bind(MainPresenter.Display.class).to(MainWidget.class);
bind(MenuPresenter.Display.class).to(MenuWidget.class);
bind(IssueEditPresenter.Display.class).to(IssueEditWidget.class);
bind(IssueDisplayPresenter.Display.class).to(IssueDisplayWidget.class);
If you control all of those classes, and they only exist as an
interface+implementation class for testing purpose, then I'd rather
annotate the interfaces with @ImplementedBy, e.g.
�...@implementedby(MainWidget.class)
public interface Display { ... }
That way, GIN will automatically use MainWidget as if you wrote the
bind().to(); and in case you want to inject some other implementation
(e.g. in some complex tests), you can use bind().to() without risking
a duplicate binding.
Is there any doc explaining what is behind the scene with all these
bind().to() calls ?
In my example, if I write something like
bind(SearchPresenter.Display.class).to(someWidget.class);
is it equivalent to
display = d;
display.getSearchButton().addClickHandler(new
ClickHandler() {
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
and how to tell GIN that I need to call doSearch() ?
No! GIN is only about dependency injection, i.e. it saves you the
new, and nothing else.
With the above bind().to() and an @Inject annotation on the
bind(Display) method, then when GIN is asked to instantiate a
SearchPresenter (i.e. when you do not write the new yourself) it'll
automatically instantiate a SomeWidget and call bind() with it as an
argument (and when instantiating the SomeWidget, it'll automatically
instantiate the required dependencies and inject them to @Inject-
annotated constructor, fields and methods).
Maybe you should look for Guice tutorials to better understand what
dependency injection is, and how to configure it with Guice.
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Re: how to use GIN ?
Thank you for these explanations, I think I begin to understand GIN.
.. and I'll read the Guice tutorials :-)
(or may be :-( yet another tuto...)
Yves
PS to GIN team :
please make GIN simple to understand for those who don't know Guice
and are just trying to improve their client code.
I only came to GIN because it is used in some MVP explanations.
On 28 juin, 09:00, PhilBeaudoin philippe.beaud...@gmail.com wrote:
Thomas gives very good advice, although I personally neverusethe
@ImplementedBy annotation (not entirely sure why...).
To complement his answer, if you're interested in saving the
addClickHandler call you may want to take a look at UiBinder the
@UiHandler annotation.
On Jun 27, 3:41 pm, Thomas Broyer t.bro...@gmail.com wrote:
On 27 juin, 19:39, yves yves.ko...@gmail.com wrote:
Olivier,
Thanks for the link.
If I try to summarize my problem : Which are the conventions that are
implicitly used byGINto bind classes ?
I've already seen gwt-presenter, but it didn't helped me to understand
how to transform my code to such code :
public class AppModule extends AbstractGinModule {
@Override
protected void configure() {
bind(EventBus.class).to(DefaultEventBus.class);
bind(MainPresenter.Display.class).to(MainWidget.class);
bind(MenuPresenter.Display.class).to(MenuWidget.class);
bind(IssueEditPresenter.Display.class).to(IssueEditWidget.class);
bind(IssueDisplayPresenter.Display.class).to(IssueDisplayWidget.class);
If you control all of those classes, and they only exist as an
interface+implementation class for testing purpose, then I'd rather
annotate the interfaces with @ImplementedBy, e.g.
�...@implementedby(MainWidget.class)
public interface Display { ... }
That way,GINwill automaticallyuseMainWidget as if you wrote the
bind().to(); and in case you want to inject some other implementation
(e.g. in some complex tests), you canusebind().to() without risking
a duplicate binding.
Is there any doc explaining what is behind the scene with all these
bind().to() calls ?
In my example, if I write something like
bind(SearchPresenter.Display.class).to(someWidget.class);
is it equivalent to
display = d;
display.getSearchButton().addClickHandler(new
ClickHandler() {
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
and how to tellGINthat I need to call doSearch() ?
No!GINis only about dependency injection, i.e. it saves you the
new, and nothing else.
With the above bind().to() and an @Inject annotation on the
bind(Display) method, then whenGINis asked to instantiate a
SearchPresenter (i.e. when you do not write the new yourself) it'll
automatically instantiate a SomeWidget and call bind() with it as an
argument (and when instantiating the SomeWidget, it'll automatically
instantiate the required dependencies and inject them to @Inject-
annotated constructor, fields and methods).
Maybe you should look for Guice tutorials to better understand what
dependency injection is, and how to configure it with Guice.
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how to use GIN ?
Hi Everybody,
I've read the the official tutorial at
http://code.google.com/p/google-gin/wiki/GinTutorial,
but I still doesn't understand how to use GIN (as it is mainly based
on Guice that I don't know) and how it could help me :-( Sorry for
the tutorial writer :-)
I'm currently developping an MVP based app mainly inspired by the
google IO 2009 presentation
http://code.google.com/intl/fr/events/io/2009/sessions/GoogleWebToolkitBestPractices.html
and also the article
http://code.google.com/intl/fr/webtoolkit/articles/mvp-architecture.html.
Here is an example of the code I would like to simplify using DI (as I
understand, GIN could do some part for me) :
public class SearchPresenter implements Presenter {
public interface Display {
HasClickHandlers getSearchButton();
}
Display display;
public void bind(Display d) {
display = d;
display.getSearchButton().addClickHandler(new ClickHandler() {
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
}
As I understand, perhaps I am wrong, GIN could do the bind() for me ?
But, how should I use GIN for that (if it is really suited for this) ?
Thanks for your help !
Yves
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Re: how to use GIN ?
hi
Google to gwt-presenter
HIH
On Sun, Jun 27, 2010 at 12:51 PM, yves yves.ko...@gmail.com wrote:
Hi Everybody,
I've read the the official tutorial at
http://code.google.com/p/google-gin/wiki/GinTutorial,
but I still doesn't understand how to use GIN (as it is mainly based
on Guice that I don't know) and how it could help me :-( Sorry for
the tutorial writer :-)
I'm currently developping an MVP based app mainly inspired by the
google IO 2009 presentation
http://code.google.com/intl/fr/events/io/2009/sessions/GoogleWebToolkitBestPractices.html
and also the article
http://code.google.com/intl/fr/webtoolkit/articles/mvp-architecture.html.
Here is an example of the code I would like to simplify using DI (as I
understand, GIN could do some part for me) :
public class SearchPresenter implements Presenter {
public interface Display {
HasClickHandlers getSearchButton();
}
Display display;
public void bind(Display d) {
display = d;
display.getSearchButton().addClickHandler(new ClickHandler()
{
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
}
As I understand, perhaps I am wrong, GIN could do the bind() for me ?
But, how should I use GIN for that (if it is really suited for this) ?
Thanks for your help !
Yves
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- Pablo Picasso -
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Re: how to use GIN ?
Olivier,
Thanks for the link.
If I try to summarize my problem : Which are the conventions that are
implicitly used by GIN to bind classes ?
I've already seen gwt-presenter, but it didn't helped me to understand
how to transform my code to such code :
public class AppModule extends AbstractGinModule {
@Override
protected void configure() {
bind(EventBus.class).to(DefaultEventBus.class);
bind(MainPresenter.Display.class).to(MainWidget.class);
bind(MenuPresenter.Display.class).to(MenuWidget.class);
bind(IssueEditPresenter.Display.class).to(IssueEditWidget.class);
bind(IssueDisplayPresenter.Display.class).to(IssueDisplayWidget.class);
}
}
(found here
http://code.google.com/p/gwt-mvp-sample/source/browse/branches/gwt-presenter/src/com/enunes/bit/client/gin/AppModule.java)
Is there any doc explaining what is behind the scene with all these
bind().to() calls ?
In my example, if I write something like
bind(SearchPresenter.Display.class).to(someWidget.class);
is it equivalent to
display = d;
display.getSearchButton().addClickHandler(new
ClickHandler() {
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
and how to tell GIN that I need to call doSearch() ?
Thanks !
Yves
On 27 juin, 19:05, olivier nouguier olivier.nougu...@gmail.com
wrote:
hi
Google to gwt-presenter
HIH
On Sun, Jun 27, 2010 at 12:51 PM, yves yves.ko...@gmail.com wrote:
Hi Everybody,
I've read the the official tutorial at
http://code.google.com/p/google-gin/wiki/GinTutorial,
but I still doesn't understand how to use GIN (as it is mainly based
on Guice that I don't know) and how it could help me :-( Sorry for
the tutorial writer :-)
I'm currently developping an MVP based app mainly inspired by the
google IO 2009 presentation
http://code.google.com/intl/fr/events/io/2009/sessions/GoogleWebToolk...
and also the article
http://code.google.com/intl/fr/webtoolkit/articles/mvp-architecture.html.
Here is an example of the code I would like to simplify using DI (as I
understand, GIN could do some part for me) :
public class SearchPresenter implements Presenter {
public interface Display {
HasClickHandlers getSearchButton();
}
Display display;
public void bind(Display d) {
display = d;
display.getSearchButton().addClickHandler(new ClickHandler()
{
�...@override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
}
As I understand, perhaps I am wrong, GIN could do the bind() for me ?
But, how should I use GIN for that (if it is really suited for this) ?
Thanks for your help !
Yves
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- Pablo Picasso -
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Re: how to use GIN ?
On 27 juin, 19:39, yves yves.ko...@gmail.com wrote:
Olivier,
Thanks for the link.
If I try to summarize my problem : Which are the conventions that are
implicitly used by GIN to bind classes ?
I've already seen gwt-presenter, but it didn't helped me to understand
how to transform my code to such code :
public class AppModule extends AbstractGinModule {
@Override
protected void configure() {
bind(EventBus.class).to(DefaultEventBus.class);
bind(MainPresenter.Display.class).to(MainWidget.class);
bind(MenuPresenter.Display.class).to(MenuWidget.class);
bind(IssueEditPresenter.Display.class).to(IssueEditWidget.class);
bind(IssueDisplayPresenter.Display.class).to(IssueDisplayWidget.class);
If you control all of those classes, and they only exist as an
interface+implementation class for testing purpose, then I'd rather
annotate the interfaces with @ImplementedBy, e.g.
@ImplementedBy(MainWidget.class)
public interface Display { ... }
That way, GIN will automatically use MainWidget as if you wrote the
bind().to(); and in case you want to inject some other implementation
(e.g. in some complex tests), you can use bind().to() without risking
a duplicate binding.
Is there any doc explaining what is behind the scene with all these
bind().to() calls ?
In my example, if I write something like
bind(SearchPresenter.Display.class).to(someWidget.class);
is it equivalent to
display = d;
display.getSearchButton().addClickHandler(new
ClickHandler() {
@Override
public void onClick(ClickEvent event) {
doSearch(event);
}
});
and how to tell GIN that I need to call doSearch() ?
No! GIN is only about dependency injection, i.e. it saves you the
new, and nothing else.
With the above bind().to() and an @Inject annotation on the
bind(Display) method, then when GIN is asked to instantiate a
SearchPresenter (i.e. when you do not write the new yourself) it'll
automatically instantiate a SomeWidget and call bind() with it as an
argument (and when instantiating the SomeWidget, it'll automatically
instantiate the required dependencies and inject them to @Inject-
annotated constructor, fields and methods).
Maybe you should look for Guice tutorials to better understand what
dependency injection is, and how to configure it with Guice.
--
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