public class User { @NotNull private String username; @Size(min = 6, max = 20) private String password; } public class MyValidatorFactory implements ValidationProvider<MyValidator> { @Override public MyValidator create(ValidationContext context) { return new MyValidator(); } } public interface GroupA {} public interface GroupB {} public class User { @NotNull(groups = GroupA.class) private String username; @NotEmpty(groups = GroupB.class) private String password; } @GwtValidation(User.class) public interface MyValidator extends Validator { @CheckReturnValue User validatedUser(User user); } <inherits name="javax.validation.Validation" /> <inherits name="org.hibernate.validator.HibernateValidator" /> <dependency> <groupId>javax.validation</groupId> <artifactId>validation-api</artifactId> <version>1.1.0.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.4.0.Final</version> </dependency> <dependency> <groupId>com.google.gwt.inject</groupId> <artifactId>gin</artifactId> <version>2.1.2</version> </dependency> <dependency> <groupId>com.google.gwt.validation</groupId> <artifactId>gwt-validation</artifactId> <version>2.0.5</version> </dependency> <replace-with class="com.example.MyValidatorFactory"> <when-type-is class="com.google.gwt.validation.client.impl.AbstractGwtValidatorFactory"/> </replace-with>


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