Hello,
You can bind User object to a singleton provider that is retrieving user
information. Here is what we are doing in one of our projects:
public class UserInfo {
public static UserInfo with(String email, String firstname, String
surname, String family) {
UserInfo info = new UserInfo();
info.email = email;
info.firstname = firstname;
info.surname = surname;
info.family = family;
return info;
}
private UserInfo() {
}
private String email;
private String firstname;
private String family;
private String surname;
public String getEmail() {
return email;
}
public String getFirstname() {
return firstname;
}
public String getFamily() {
return family;
}
public String getSurname() {
return surname;
}
}
and also we have a provider class:
public class UserInfoProvider implements Provider<UserInfo> {
public UserInfo get() {
Dictionary userInfoDict = Dictionary.getDictionary("userInfo");
String email = userInfoDict.get("email");
String firstname = userInfoDict.get("firstname");
String surname = userInfoDict.get("surname");
String family = userInfoDict.get("family");
UserInfo userInfo = UserInfo.with(email, firstname, surname, family);
return userInfo;
}
}
As you can see the provider is retrieving user information using
Dictionary provided by GWT. Currently our main page is rendering user
information as an in-line json that looks as follow:
<script language="JavaScript">
var userInfo = {
email: "johnu...@somedomain.com",
firstname: "John",
surname: "",
family: "Smith"
}
</script>
And finally we are adding binding to the provider class:
bind(UserInfo.class).toProvider(UserInfoProvider.class).in(Singleton.class);
// we are binding it as a singleton, cause we don't want to instantiate
new UserInfo object each time when user info have to be rendered.
And here is a sample usage:
public class UserDetailsEditor {
@Inject
public UserDetailsEditor(UserInfo userInfo) {
}
}
Regards,
Miroslav
On 06/29/2010 06:23 PM, jmccartie wrote:
I have a hazy understanding of GIN, but have it working for injecting
presenters, etc.
I'm trying to inject a self-made "User" class into all my presenters
in order to get the currently logged-in user.
I've added @Inject to the constructor on my User class, and added User
to my GIN module ... but apart from that, I'm totally lost. Do I bind
it to my app presenter (tried that, but I get an error since User
doesn't extend my AppPresenter)? As a singleton? Is this even the
right way to get pass this data around?
I hate to post this here (not looking for free homework), but I can't
find a decent tutorial/example on this anywhere else.
Much thanks in advance.
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