@Override
public void perform() throws TaskException {
try {
Instances[] data = this.readAndCheckData();
for (int i = 0; i < data.length; ++i) {
String oldName = data[i].relationName();
Filter filter = this.initFilter(data[i]);
data[i] = Filter.useFilter(data[i], filter);
data[i].setRelationName(oldName); // keep the old relation name
FileUtils.writeArff(this.output.get(i), data[i]);
}
} catch (TaskException e) {
throw e;
} catch (Exception e) {
Logger.getInstance().logStackTrace(e, Logger.V_DEBUG);
throw new TaskException(TaskException.ERR_IO_ERROR, this.id, e.getMessage());
}
}
@Override
protected void manipulateAttributes(Instances data) throws TaskException {
String[] attribs = this.getParameterVal(ATTRIBS).split("\\s+");
for (int i = 0; i < attribs.length; ++i) {
if (data.attribute(attribs[i]) == null) {
Logger.getInstance()
.message(
"Attribute " + attribs[i] + " not found in data set " + data.relationName(),
Logger.V_WARNING);
continue;
}
Enumeration<Instance> insts = data.enumerateInstances();
int attrIndex = data.attribute(attribs[i]).index();
while (insts.hasMoreElements()) {
Instance inst = insts.nextElement();
inst.setMissing(attrIndex);
}
}
}