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In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
... into how these constraints are defined and carried out (I'm using version 4.1):
The @NotNull constraint is defined as:
@Constraint(validatedBy = {NotNullValidator.class})
This class has an isValid method defined as:
public boolean isValid(Object object, ConstraintValidatorContext constr...
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reinrein
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ulidtko
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Felix KlingFelix Kling
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Can I make the foreign key field optional in Django model
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edited Jan 24 '14 at 19:55
akki
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answered Jul 8 '11...
