Package org.apache.wicket.bean.validation

Class PropertyValidator<T>

java.lang.Object

org.apache.wicket.behavior.Behavior

org.apache.wicket.bean.validation.PropertyValidator<T>

Type Parameters:

T -

All Implemented Interfaces:

Serializable, IComponentAwareEventSink, IComponentAwareHeaderContributor, IClusterable, INullAcceptingValidator<T>, IValidator<T>

public class PropertyValidator<T>
extends Behavior
implements INullAcceptingValidator<T>

Validator that delegates to the bean validation framework. The integration has to be first configured using BeanValidationConfiguration.

The validator must be provided a Property, unless one can be resolved from the component implicitly. By default the configuration contains the DefaultPropertyResolver so PropertyModels are supported out of the box - when attached to a component with a property model the property does not need to be specified explicitly.

The validator will set the required flag on the form component it is attached to based on the presence of the @NotNull annotation, see BeanValidationContext.isRequiredConstraint(ConstraintDescriptor) for details. Notice, the required flag will only be set to true, components with the required flag already set to true will not have the flag set to false by this validator.

The validator will allow ITagModifiers registered on BeanValidationContext to mutate the markup tag of the component it is attached to, e.g. add a maxlength attribute.

The validator specifies default error messages in the PropertyValidator.properties file. These values can be overridden in the application subclass' property files globally or in the page or panel properties locally. See this file for the default messages supported.

Author:

igor

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
PropertyValidator(Class<?>... groups)
PropertyValidator(Property property, Class<?>... groups)
PropertyValidator(Property property, IModel<Class<?>[]> groups)
PropertyValidator(IModel<Class<?>[]> groups)

Method Summary

Modifier and Type	Method	Description
void	bind(Component component)	Bind this handler to the given component.
void	detach(Component component)	Allows the behavior to detach any state it has attached during request processing.
protected boolean	isRequired()	Should this property make the owning component required.
void	onComponentTag(Component component, ComponentTag tag)	Called any time a component that has this behavior registered is rendering the component tag.
void	onConfigure(Component component)	Called immediately after the onConfigure method in a component.
void	validate(IValidatable<T> validatable)	Validates the IValidatable instance.

Methods inherited from class org.apache.wicket.behavior.Behavior

afterRender, beforeRender, canCallListener, getStatelessHint, isEnabled, isTemporary, onAttribute, onEvent, onException, onRemove, onTag, renderHead, unbind

Methods inherited from class java.lang.Object

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

Constructor Details

PropertyValidator

public PropertyValidator(Class<?>... groups)

PropertyValidator

public PropertyValidator(IModel<Class<?>[]> groups)

PropertyValidator

public PropertyValidator(Property property,
 Class<?>... groups)

PropertyValidator

public PropertyValidator(Property property,
 IModel<Class<?>[]> groups)

Method Details

bind

public void bind(Component component)

Description copied from class: Behavior

Bind this handler to the given component. This method is called by the host component immediately after this behavior is added to it. This method is useful if you need to do initialization based on the component it is attached and you can't wait to do it at render time. Keep in mind that if you decide to keep a reference to the host component, it is not thread safe anymore, and should thus only be used in situations where you do not reuse the behavior for multiple components.

Overrides:

bind in class Behavior

Parameters:

component - the component to bind to

onConfigure

public void onConfigure(Component component)

Description copied from class: Behavior

Called immediately after the onConfigure method in a component. Since this is before the rendering cycle has begun, the behavior can modify the configuration of the component (i.e. setVisible(false))

Overrides:

onConfigure in class Behavior

Parameters:

component - the component being configured

detach

public void detach(Component component)

Description copied from class: Behavior

Allows the behavior to detach any state it has attached during request processing.

Overrides:

detach in class Behavior

Parameters:

component - the component that initiates the detachment of this behavior

isRequired

protected boolean isRequired()

Should this property make the owning component required.

Returns:

true if required

See Also:

• BeanValidationContext.isRequiredConstraint(ConstraintDescriptor)

onComponentTag

public void onComponentTag(Component component,
 ComponentTag tag)

Description copied from class: Behavior

Called any time a component that has this behavior registered is rendering the component tag.

Overrides:

onComponentTag in class Behavior

Parameters:

component - the component that renders this tag currently

tag - the tag that is rendered

validate

public void validate(IValidatable<T> validatable)

Description copied from interface: IValidator

Validates the IValidatable instance. Validation errors should be reported using the IValidatable.error(IValidationError) method.

Specified by:

validate in interface IValidator<T>

Parameters:

validatable - the IValidatable instance being validated