com.opensymphony.xwork2.validator.annotations

Annotation Type ConditionalVisitorFieldValidator

@Target(value=METHOD)
@Retention(value=RUNTIME)
public @interface ConditionalVisitorFieldValidator

The validator allows you to forward validator to object properties of your action using the objects own validator files. This allows you to use the ModelDriven development pattern and manage your validations for your models in one place, where they belong, next to your model classes.

The ConditionalVisitorFieldValidator can handle either simple Object properties, Collections of Objects, or Arrays. The error message for the ConditionalVisitorFieldValidator will be appended in front of validator messages added by the validations for the Object message.

Annotation usage:

The annotation must be applied at method level.

Annotation parameters:

Parameter	Required	Default	Notes
expression	yes		Boolean conditional expression
message	yes		field error message
key	no		i18n key from language specific properties file.
messageParams	no		Additional params to be used to customize message - will be evaluated against the Value Stack
fieldName	no
shortCircuit	no	false	If this validator should be used as shortCircuit.
context	no	action alias	Determines the context to use for validating the Object property. If not defined, the context of the Action validation is propagated to the Object property validation. In the case of Action validation, this context is the Action alias.
appendPrefix	no	true	Determines whether the field name of this field validator should be prepended to the field name of the visited field to determine the full field name when an error occurs. For example, suppose that the bean being validated has a "name" property. If appendPrefix is true, then the field error will be stored under the field "bean.name". If appendPrefix is false, then the field error will be stored under the field "name". If you are using the VisitorFieldValidator to validate the model from a ModelDriven Action, you should set appendPrefix to false unless you are using "model.name" to reference the properties on your model.

Example code:

 
 @ConditionalVisitorFieldValidator(expression="app.appid > 100",  message = "Default message", key = "i18n.key", shortCircuit = true, context = "action alias", appendPrefix = true)
 
 

Author:

Matt Raible

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
String	expression

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
boolean	appendPrefix Determines whether the field name of this field validator should be prepended to the field name of the visited field to determine the full field name when an error occurs.
String	context Determines the context to use for validating the Object property.
String	fieldName
String	key
String	message
String[]	messageParams
boolean	shortCircuit If this is activated, the validator will be used as short-circuit.

Element Detail

expression

public abstract String expression

Returns:

The conditional expression.

context

public abstract String context

Determines the context to use for validating the Object property. If not defined, the context of the Action validator is propagated to the Object property validator. In the case of Action validator, this context is the Action alias.

Returns:

the context

Default:

""

appendPrefix

public abstract boolean appendPrefix

Determines whether the field name of this field validator should be prepended to the field name of the visited field to determine the full field name when an error occurs. For example, suppose that the bean being validated has a 'name' property. If appendPrefix is true, then the field error will be stored under the field 'bean.name'. If appendPrefix is false, then the field error will be stored under the field 'name'. If you are using the ConditionalVisitorFieldValidator to validate the model from a ModelDriven Action, you should set appendPrefix to false unless you are using "model.name" to reference the properties on your model.

Returns:

if append prefix

Default:

true

message

public abstract String message

Returns:

The default error message for this validator. NOTE: It is required to set a message, if you are not using the message key for 18n lookup!

Default:

""

key

public abstract String key

Returns:

The message key to lookup for i18n.

Default:

""

messageParams

public abstract String[] messageParams

Returns:

Additional params to be used to customize message - will be evaluated against the Value Stack

Default:

{}

fieldName

public abstract String fieldName

Returns:

The optional fieldName for SIMPLE validator types.

Default:

""

shortCircuit

public abstract boolean shortCircuit

If this is activated, the validator will be used as short-circuit. Adds the short-circuit='true' attribute value if true.

Returns:

true if validator will be used as short-circuit. Default is false.

Default:

false