/**
* @see org.openmrs.logic.Rule#eval(org.openmrs.logic.LogicContext, java.lang.Integer,
* java.util.Map)
*/
public Result eval(LogicContext context, Integer patientId, Map<String, Object> parameters)
throws LogicException {
Integer index = null;
List<Result> results = null;
Result distinctResult = null;
if (parameters != null) {
Object param1Obj = parameters.get("param1");
if (param1Obj != null) {
index = Integer.parseInt((String) param1Obj);
}
results = (List<Result>) parameters.get("param2");
}
if (index != null && results != null && index < results.toArray().length) {
// Sort the results by date
Collections.sort(results, new ResultDateComparator());
// Reverse the list
Collections.reverse(results);
distinctResult = (Result) results.toArray()[index];
}
if (distinctResult == null) {
distinctResult = new Result();
}
if (distinctResult.toString() == null) {
distinctResult.setValueText(String.valueOf(distinctResult.toNumber()));
}
return distinctResult;
}
/**
* @return string representation of the result. For non-text results, this will either be the
* overridden text value (if specifically defined) or a string representation of the default
* datatype value. If the result is a list, then the string representation of all members a
* joined with commas.
*/
public String toString() {
if (isSingleResult()) {
if (datatype == null) {
return valueText == null ? "" : valueText;
}
switch (datatype) {
case BOOLEAN:
return (valueBoolean ? "true" : "false");
case CODED:
return (valueCoded == null ? "" : valueCoded.getBestName(Context.getLocale()).getName());
case DATETIME:
return (valueDatetime == null ? "" : Context.getDateFormat().format(valueDatetime));
case NUMERIC:
return (valueNumeric == null ? "" : String.valueOf(valueNumeric));
case TEXT:
return (valueText == null ? "" : valueText);
default:
return valueText;
}
}
StringBuffer s = new StringBuffer();
for (Result r : this) {
if (s.length() > 0) {
s.append(",");
}
s.append(r.toString());
}
return s.toString();
}