PropertyValidator (OpenXava 7.3 API)

```
@Repeatable(PropertyValidators.class)
@Retention(RUNTIME)
@Target({FIELD,METHOD})
@Constraint(validatedBy=PropertyValidatorValidator.class)
public @interface PropertyValidator
```
The validator execute validation logic on the value assigned to the property just before storing.
Applies to properties.
Example:
```
  @PropertyValidator(UnitPriceValidator.class)
  private BigDecimal unitPrice;
 
```
PropertyValidator is also implemented as a Hibernate validation, therefore it's executed when you save using JPA or Hibernate API, with the exception of onlyOnCreate=true, in this last case the validation is only applied when you save with OpenXava (using MapFacade or standard OX actions).
Author:

Javier Paniza

Required Element Summary

Required Elements
Modifier and Type Required Element Description

java.lang.Class value
Class with the validation logic.

Optional Element Summary

Optional Elements
Modifier and Type	Optional Element	Description
`java.lang.Class<?>[]`	`groups`
`java.lang.String`	`message`	The message to be shown if validation fails.
`boolean`	`onlyOnCreate`	If true the validator is executed only when creating a new object, not when an existing object is modified.
`java.lang.Class<? extends javax.validation.Payload>[]`	`payload`
`PropertyValue[]`	`properties`	To set values to the validator properties before executing it.

- Element Detail
  - value
```
java.lang.Class value
```
    Class with the validation logic.
    Must implements IPropertyValidator.
- - properties
```
PropertyValue[] properties
```
    To set values to the validator properties before executing it.
    
    Default:
    
    {}
- - onlyOnCreate
```
boolean onlyOnCreate
```
    If true the validator is executed only when creating a new object, not when an existing object is modified.
    
    Default:
    
    false
- - message
```
java.lang.String message
```
    The message to be shown if validation fails.
    The validator class have to implement IWithMessage to receive this message.
    If not specified the message is not injected in the validator, in this case the validator should produce an appropriate default message.
    You can specify an id of the messages i18n file using braces:
    message="{color_not_available}"
    Or directly the message:
    message="That color is not available. This car can be only red or yellow"
    Default:
    
    ""
- - groups
```
java.lang.Class<?>[] groups
```
    Default:
    
    {}
- - payload
```
java.lang.Class<? extends javax.validation.Payload>[] payload
```
    Default:
    
    {}