org.apache.tapestry5.validator
Class AbstractValidator<C,T>

java.lang.Object
  org.apache.tapestry5.validator.AbstractValidator<C,T>

All Implemented Interfaces:

Validator<C,T>

Direct Known Subclasses:

Email, Max, MaxLength, Min, MinLength, None, Regexp, Required

public abstract class AbstractValidator<C,T>
extends Object
implements Validator<C,T>

Base class for constructing a Validator.

Constructor Summary

protected

AbstractValidator(Class<C> constraintType, Class<T> valueType, String messageKey)

Method Summary

Class<C>	getConstraintType() Returns the type of constraint value used with this validator.
String	getMessageKey() Returns the message key, within the validation messages, normally used by this validator.
Class<T>	getValueType() Returns the value type associated with this validator.
boolean	isRequired() Return false, which is correct for the vast majority of validators.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.tapestry5.Validator

render, validate

Constructor Detail

AbstractValidator

protected AbstractValidator(Class<C> constraintType,
                            Class<T> valueType,
                            String messageKey)

Method Detail

getConstraintType

public final Class<C> getConstraintType()

Description copied from interface: Validator

Returns the type of constraint value used with this validator. Constraint values are used to parameterize a validator, for example a "maxLength" validator will have a constraint value of type int (the maximum length allowed). For constraints that do not have a constraint value, this method returns null.

Specified by:

getConstraintType in interface Validator<C,T>

getValueType

public final Class<T> getValueType()

Description copied from interface: Validator

Returns the value type associated with this validator. Validator.validate(Field, Object, MessageFormatter, Object) will only be invoked when the value is assignable to the validator's value type.

Specified by:

getValueType in interface Validator<C,T>

getMessageKey

public final String getMessageKey()

Description copied from interface: Validator

Returns the message key, within the validation messages, normally used by this validator. This is used to provide the MessageFormatter passed to Validator.validate(Field, Object, MessageFormatter, Object) (unless overridden).

Specified by:

getMessageKey in interface Validator<C,T>

Returns:

a message key

isRequired

public boolean isRequired()

Return false, which is correct for the vast majority of validators. Required overrides this to true.F

Specified by:

isRequired in interface Validator<C,T>