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Often the same validation logic is implemented in each layer which is time consuming and error-prone.To avoid duplication of these validations, developers often bundle validation logic directly into the domain model, cluttering domain classes with validation code which is really metadata about the class itself.Learn the eight fundamental principles that underlie all security efforts, the importance of filtering input and controlling output, and smart strategies for encryption and user authentication.Kevin also covers special considerations when it comes to credit cards, regular expressions, source code managers, and databases.
You can learn more about the integration of Bean Validation and CDI in Section 11.3, “CDI”. Section 2.3, “Built-in constraints” provides an overview of all built-in constraints coming with Hibernate Validator.
If the parameter is not specified, the default validation group ( constraint Violations = validator.validate Property( car, "manufacturer" ); assert Equals( 1, constraint Violations.size() ); assert Equals( "must not be null", constraint Violations.iterator().next()Message() ); constraint Violations = validator.validate Value( Car.class, "manufacturer", null ); assert Equals( 1, constraint Violations.size() ); assert Equals( "must not be null", constraint Violations.iterator().next()Message() ); is for example used in the integration of Bean Validation into JSF 2 (see Section 11.2, “JSF & Seam”) to perform a validation of the values entered into a form before they are propagated to the model.
a lot of useful information about the cause of the validation failure can be determined. The values under "Example" column refer to Example 2.14, “Using Hibernate Validator comprises a basic set of commonly used constraints.
JSR 380 - Bean Validation 2.0 - defines a metadata model and API for entity and method validation.
The default metadata source are annotations, with the ability to override and extend the meta-data through the use of XML.
Hibernate Validator is the reference implementation of this JSR 380.