/**
* Using the given String-representation of the value and the current InformationState, calculate
* the current Value
*
* @param str - the String-representation of the value
* @param is - the current InformationState
* @return Value
* @throws TemplateRunException
*/
public Value getDynamicValue(String str, InformationState is) throws TemplateRunException {
/* Determine the start-index and the end-index of the IS-reference, and create the IS-path */
int startindex = str.indexOf("$");
if (startindex == -1) {
throw new TemplateRunException("Missing $-sign in referenced value (" + str + ").");
}
int endindex = -1;
for (int i = startindex + 1; i < str.length(); i++) {
char ch = str.charAt(i);
if (!(Character.isLetter(ch) || Character.isDigit(ch) || ch == '_' || ch == '.')) {
endindex = i;
}
}
if (endindex == -1) {
endindex = str.length();
}
String path = str.substring(startindex, endindex);
/* Use the reference-path, get the InformationState-Item of the corresponding IS-variable */
Item item = is.getValueOfPath(path);
if (item == null) {
return null;
} else {
return new Value(item);
}
}
