PortletPreferencesService.java 文件源码

/**
 * Returns the preferences validator instance for the given portlet
 * definition. If no preferences validator class is defined for the portlet
 * definition, null is returned. This method caches the validator instances
 * in the cache to ensure that only one validator instance is created per
 * portlet definition.
 * @param portletDefinition  the portlet definition.
 * @return the preferences validator if defined for the portlet definition.
 * @throw ValidatorException  if fail to instantiate validator instance.
 */
PreferencesValidator getPreferencesValidator(PortletDefinition portletDefinition)
throws ValidatorException;