With the text entry parameter you can provide users a simple text field to enter parameter values. By changing the specific properties of the parameter you control the presentation of the text field (height and width) by defining the type, and which type of object is to be returned. Beside the java.lang.String (for a text object) you can choose from various number formats. In addition, you can specify a default value for the parameter. If you want a NULL to be returned when the parameter is left empty instead of an empty string, select the ''return NULL if empty'' option.
With the pattern field you can state a regular expression that will be checked when entered by the user. If the entry is not made in the required format, an error message will be shown.