@Retention(value=RUNTIME) @Target(value={FIELD,TYPE}) public @interface Until
Until annotation then the field will be ignored from the JSON output. This annotation
is useful to manage versioning of your JSON classes for a web-service.
This annotation has no effect unless you build Gson with a
GsonBuilder and invoke
GsonBuilder.setVersion(double) method.
Here is an example of how this annotation is meant to be used:
public class User {
private String firstName;
private String lastName;
@Until(1.1) private String emailAddress;
@Until(1.1) private String password;
}
If you created Gson with new Gson(), the toJson() and fromJson()
methods will use all the fields for serialization and deserialization. However, if you created
Gson with Gson gson = new GsonBuilder().setVersion(1.2).create() then the
toJson() and fromJson() methods of Gson will exclude the emailAddress
and password fields from the example above, because the version number passed to the
GsonBuilder, 1.2, exceeds the version number set on the Until annotation,
1.1, for those fields.
| Modifier and Type | Required Element and Description |
|---|---|
double |
value
the value indicating a version number until this member
or type should be ignored.
|