com.google.gson.interceptors

Annotation Type Intercept

@Retention(value=RUNTIME)
 @Target(value=TYPE)
public @interface Intercept

Use this annotation to indicate various interceptors for class instances after they have been processed by Gson. For example, you can use it to validate an instance after it has been deserialized from Json. Here is an example of how this annotation is used:

Here is an example of how this annotation is used:

 @Intercept(postDeserialize=UserValidator.class)
 public class User {
   String name;
   String password;
   String emailAddress;
 }

 public class UserValidator implements JsonPostDeserializer<User> {
   public void postDeserialize(User user) {
     // Do some checks on user
     if (user.name == null || user.password == null) {
       throw new JsonParseException("name and password are required fields.");
     }
     if (user.emailAddress == null) {
       emailAddress = "unknown"; // assign a default value.
     }
   }
 }
 

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
java.lang.Class<? extends JsonPostDeserializer>	postDeserialize Specify the class that provides the methods that should be invoked after an instance has been deserialized.

Element Detail

postDeserialize

public abstract java.lang.Class<? extends JsonPostDeserializer> postDeserialize

Specify the class that provides the methods that should be invoked after an instance has been deserialized.