Interface ValidationConstraintGenerator

All Known Implementing Classes:
MessagesConstraintGenerator, PrimitiveFieldConstraintGenerator, ValidateAnnotationConstraintGenerator, ValidationConstraintGeneratorImpl

public interface ValidationConstraintGenerator

Invoked to generate a list of validation constraint strings for a property. This typically involves scanning the property for annotations or naming conventions that confer the desired validation. The constraint strings are ultimately handed to FieldValidatorSource.createValidator(org.apache.tapestry5.Field, String, String, String, org.apache.tapestry5.ioc.Messages, java.util.Locale).

Method Summary
 List<String> buildConstraints(Class propertyType, AnnotationProvider annotationProvider)
          For a given property, identify all the approprite validation constraints.

Method Detail


List<String> buildConstraints(Class propertyType,
                              AnnotationProvider annotationProvider)
For a given property, identify all the approprite validation constraints. Each returned value is the name of a validator (i.e., "required") or a validator name and configuration (i.e., "minlength=5"). These contraints are exactly the individual terms in a validate specification. These will ultimately be used to create FieldValidators for the field that edits the property.

propertyType - the type of the property for which constraints are needed
annotationProvider - provides access to any annotations concerning the property (for implementations that are based on analysis of property annotations)
a list of constraints
See Also:

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