<p>Produce the output string generated by applying a user-specified
string function on a provided input string. The available string
functions are a case sensitive subset of the java.lang.String
functions.
<ul>
<li> <b>trim</b>: Remove leading and trailing whitespace from a string.</li>
<li> <b>toUpperCase</b>: Convert all letters in a string to uppercase.</li>
<li> <b>toLowerCase</b>: Convert all letters in a string to lowercase.</li>
</ul></p>
Mike Kofi Okyere, Ismael M. Sarmiento
$Id: StringFunction.java 70398 2014-10-22 23:44:32Z cxh $
Ptolemy II 4.0
Green (ismael)
Green (net)
Parameter that stores the string function to be performed
on the input string. The possible values are "trim" (the default),
"toUpperCase", or "toLowerCase".