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## com.gwtext.client.widgets.form
Interface Validator

    public interface Validator

Interface that must be implemented for custom Field validation logic.

See Also:
  `TextField.setValidator(Validator)`

Method Summary
`boolean` | `validate(java.lang.String value)` Return true if Field value is valid and false if invalid.

Method Detail

### validate

    boolean validate(java.lang.String value)
                     throws ValidationException

  Return true if Field value is valid and false if invalid. The value set in `Field.setInvalidText(String)` will be used as the error message. For a custom error message throw a ValidationException with the error message. The error message of the ValidationException will be dispalyed.

  Parameters:
    `value` - the field value to test
  Returns:
    true if valid, false if invalid.
  Throws:
    `ValidationException` - when validate fails

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