Annotation Interface FieldExpressionValidator


@Target(METHOD) @Retention(RUNTIME) public @interface FieldExpressionValidator
This validator uses an OGNL expression to perform its validator. The error message will be added to the field if the expression returns false when it is evaluated against the value stack.

Annotation usage:

The annotation must be applied at method level.

Annotation parameters:

Parameter Required Default Notes
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.
expression yes   An OGNL expression that returns a boolean value.

Example code:

 
 @FieldExpressionValidator(message = "Default message", key = "i18n.key", shortCircuit = true, expression = "an OGNL expression")
 
 
Author:
Rainer Hermanns
  • Element Details

    • expression

      String expression
      Returns:
      An OGNL expression that returns a boolean value.
    • message

      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

      String key
      Returns:
      The message key to lookup for i18n.
      Default:
      ""
    • messageParams

      String[] messageParams
      Returns:
      Additional params to be used to customize message - will be evaluated against the Value Stack
      Default:
      {}
    • fieldName

      String fieldName
      Returns:
      The optional fieldName for SIMPLE validator types.
      Default:
      ""
    • shortCircuit

      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