/**
* Añade un item al perfil para que sea tomado en cuenta como valorado positivamente (relevante)
* en el perfil de usuario.
*
* @param items contenido del item que se desea agregar
* @param condensationFormula formula para agregar los características numéricos de los items
* relevantes en el perfil
*/
public void addItems(Set<Item> items, AggregationOperator condensationFormula) {
TreeMap<Feature, Set<Number>> profileNumericalValues = new TreeMap<Feature, Set<Number>>();
for (Item i : items) {
for (Feature itemFeature : i.getFeatures()) {
switch (itemFeature.getType()) {
case Nominal:
Object featureValue = i.getFeatureValue(itemFeature);
if (_nominalValues.containsKey(itemFeature)) {
Map<Object, Double> treeMap = _nominalValues.get(itemFeature);
if (treeMap.containsKey(featureValue)) {
treeMap.put(featureValue, treeMap.get(featureValue) + 1);
} else {
treeMap.put(featureValue, 1.0);
}
} else {
Map<Object, Double> treeMap = new TreeMap<Object, Double>();
treeMap.put(featureValue, 1.0);
_nominalValues.put(itemFeature, treeMap);
}
break;
case Numerical:
if (profileNumericalValues.containsKey(itemFeature)) {
profileNumericalValues.get(itemFeature).add((Number) i.getFeatureValue(itemFeature));
} else {
Set<Number> lista = new TreeSet<Number>();
lista.add((Number) i.getFeatureValue(itemFeature));
profileNumericalValues.put(itemFeature, lista);
}
break;
default:
throw new UnsupportedOperationException(
"The item feature type " + itemFeature.getType() + " isn't supported");
}
}
}
for (Feature f : _nominalValues.keySet()) {
for (Object value : _nominalValues.get(f).keySet()) {
double valor = _nominalValues.get(f).get(value);
valor = valor / items.size();
_nominalValues.get(f).put(value, valor);
}
}
_numericalValues = new TreeMap<Feature, Double>();
for (Feature f : profileNumericalValues.keySet()) {
Set<Number> get = profileNumericalValues.get(f);
_numericalValues.put(f, condensationFormula.aggregateValues(get));
}
}
/**
* Devuelve los valores de la característica especificada definidos en este perfil de usuario.
*
* @param itemFeature Característica para los que se busca sus valores.
* @return Conjunto de valores de la característica. Si no contiene la característica, devuelve
* null.
*/
@Override
public Set<Object> getValuedFeatureValues(Feature itemFeature) {
if (itemFeature.getType() == FeatureType.Nominal) {
return _nominalValues.get(itemFeature).keySet();
}
if (itemFeature.getType() == FeatureType.Numerical) {
Set<Object> ret = new TreeSet<Object>();
ret.add(_numericalValues.get(itemFeature));
return ret;
}
throw new UnsupportedOperationException(
"The item feature type " + itemFeature.getType() + " isn't supported");
}
@Override
public void writeDataset(UsersDataset usersDataset, String fileName) throws IOException {
String fileNameWithExtension = fileName;
if (!fileNameWithExtension.endsWith(".csv")) {
fileNameWithExtension = fileNameWithExtension + "." + CSV_EXTENSION;
}
StringBuilder stringBuilder = new StringBuilder();
Feature[] features = usersDataset.getFeatures();
stringBuilder.append(ID_ITEM_COLUMN_NAME).append(columnDelimiter);
stringBuilder.append(ITEM_NAME_COLUMN_NAME);
for (Feature userFeature : features) {
String extendedName = userFeature.getExtendedName();
stringBuilder
.append(columnDelimiter)
.append(stringDelimiter)
.append(extendedName)
.append(stringDelimiter);
}
stringBuilder.append(registerDelimiter);
for (User user : usersDataset) {
int idUser = user.getId();
StringBuilder linea = new StringBuilder();
// Escribir el id y el nombre
linea
.append(idUser)
.append(columnDelimiter)
.append(stringDelimiter)
.append(user.getName())
.append(stringDelimiter);
for (Feature userFeature : features) {
Object featureValue = user.getFeatureValue(userFeature);
String featureValueString = userFeature.getType().featureValueToString(featureValue);
linea.append(columnDelimiter).append(featureValueString);
}
linea.append(registerDelimiter);
stringBuilder.append(linea.toString());
}
BufferedWriter bufferedWriter =
new BufferedWriter(new FileWriter(new File(fileNameWithExtension)));
bufferedWriter.write(stringBuilder.toString());
bufferedWriter.flush();
bufferedWriter.close();
}
@Override
public boolean contains(Feature itemFeature, Object featureValue) {
boolean ret;
switch (itemFeature.getType()) {
case Nominal:
if (_nominalValues.containsKey(itemFeature)) {
ret = _nominalValues.get(itemFeature).containsKey(featureValue);
} else {
ret = false;
}
break;
case Numerical:
ret = _numericalValues.containsKey(itemFeature);
break;
default:
throw new UnsupportedOperationException(
"The item feature type " + itemFeature.getType() + " isn't supported");
}
return ret;
}
/**
* Devuelve el valor del perfil para el valor concreto de la característica.
*
* @param itemFeature Característica para la que se busca el valor.
* @param value Valor de la característica para el que se busca el balor.
* @return Valor del perfil para el valor y la característica indicados.
* @throws IllegalArgumentException Si no encuentra la característica o el valor de la misma.
*/
@Override
public double getFeatureValueValue(Feature itemFeature, Object value) {
if (itemFeature.getType() == FeatureType.Nominal) {
if (_nominalValues.containsKey(itemFeature)) {
Map<Object, Double> get = _nominalValues.get(itemFeature);
if (get.containsKey(value)) {
return get.get(value);
}
} else {
throw new IllegalArgumentException("Undefined nominal item feature " + itemFeature);
}
}
if (itemFeature.getType() == FeatureType.Numerical) {
if (_numericalValues.containsKey(itemFeature)) {
return _numericalValues.get(itemFeature);
} else {
throw new IllegalArgumentException("Undefined numerical item feature " + itemFeature);
}
}
throw new UnsupportedOperationException("Unknow item feature type " + itemFeature.getType());
}