CODEWITHSUNDEEP
bean-validationhibernate-validator
user2824073
user2824073

Reputation: 2485

Hibernate validation: validate PI

I'm in need to apply a validation on a double value which needs to match with PI. I'm thinking to use a @Pattern(regex="3.14159265359"). Is it the best way I can apply such a constraint using Hibernate Validation Constraints? Thanks

Upvotes: 0

Views: 83

Answers (1)

Hardy
Hardy

Reputation: 19119

@Pattern is only defined for string type (CharSequence really). If your data type is a double you cannot use it, unless you write a custom ConstraintValidator. You could use DecimalMin in combination with DecimalMax potentially allowing for some imprecision. Alternatively, you could write your own constraint @Pi which for example allows to specify a delta. @Pi is probably the best solution, provided you really need this validation.

Upvotes: 1

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