/*
* OpenClinica is distributed under the
* GNU Lesser General Public License (GNU LGPL).
* For details see: http://www.openclinica.org/license
* copyright 2003-2005 Akaza Research
*/
package org.akaza.openclinica.logic.score.function;
public class Median extends AbstractFunction {
public Median() {
super();
}
/**
* If one argument is "", then the value of this function will be "" too.
*
* @see Function#execute
*/
public void execute() {
logger.info("Execute the function Median... ");
double[] values = new double[argumentCount()];
for (int i = 0; i < argumentCount(); i++) {
String arg = getArgument(i).toString();
if (arg == null || arg.length() == 0) {
value = "";
return;
}
try {
values[i] = Double.parseDouble(arg);
} catch (Exception e) {
errors.put(new Integer(errorCount++), "Unparseable number:" + " " + arg + " " + "in evaluation of" + " Median(); ");
}
}
if (errors.size() > 0) {
logger.error("The following errors happended when Median() evaluation was performed: " + errors);
value = "";
return;
}
if (values != null && values.length > 0) {
double v = (new org.apache.commons.math.stat.descriptive.rank.Median()).evaluate(values);
value = Double.toString(v);
} else {
value = "";
}
}
}