org.apache.tapestry5.internal.services
Class FieldValidatorImpl

java.lang.Object
  extended by org.apache.tapestry5.internal.services.FieldValidatorImpl
All Implemented Interfaces:
FieldValidator

public class FieldValidatorImpl
extends Object
implements FieldValidator


Constructor Summary
FieldValidatorImpl(Field field, Object constraintValue, MessageFormatter messageFormatter, Validator validator, FormSupport formSupport)
           
 
Method Summary
 boolean isRequired()
          Returns true if any underlying Validator returns true from Validator.isRequired().
 void render(MarkupWriter writer)
          Invokes Validator.render(Field, Object, org.apache.tapestry5.ioc.MessageFormatter, MarkupWriter, org.apache.tapestry5.services.FormSupport).
 void validate(Object value)
          Invoked after the client-submitted value has been translated to check that the value conforms to expectations (often, in terms of minimum or maximum value).
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FieldValidatorImpl

public FieldValidatorImpl(Field field,
                          Object constraintValue,
                          MessageFormatter messageFormatter,
                          Validator validator,
                          FormSupport formSupport)
Method Detail

validate

public void validate(Object value)
              throws ValidationException
Description copied from interface: FieldValidator
Invoked after the client-submitted value has been translated to check that the value conforms to expectations (often, in terms of minimum or maximum value). If and only if the value is approved by all Validators is the value applied by the field.

Specified by:
validate in interface FieldValidator
Parameters:
value - the translated value supplied by the user
Throws:
ValidationException - if the value violates the constraint

render

public void render(MarkupWriter writer)
Description copied from interface: FieldValidator
Invokes Validator.render(Field, Object, org.apache.tapestry5.ioc.MessageFormatter, MarkupWriter, org.apache.tapestry5.services.FormSupport). This is called at a point "inside" the tag, so that additional attributes may be added. In many cases, the underlying Validator may write client-side JavaScript to enforce the constraint as well.

Specified by:
render in interface FieldValidator
Parameters:
writer - markup writer to direct output to.
See Also:
MarkupWriter.attributes(Object[])

isRequired

public boolean isRequired()
Description copied from interface: FieldValidator
Returns true if any underlying Validator returns true from Validator.isRequired().

Specified by:
isRequired in interface FieldValidator
Returns:
true if the field is required (a non-blank value is expected)


Copyright © 2003-2012 The Apache Software Foundation.