public static Double processValue(Target target, Double value) {
double result = value.doubleValue();
Double min = target.getMin();
if (min != null) {
result = Math.max(result, min.doubleValue());
}
Double max = target.getMax();
if (max != null) {
result = Math.min(result, max.doubleValue());
}
result = (result * target.getRescaleFactor()) + target.getRescaleConstant();
Target.CastInteger castInteger = target.getCastInteger();
if (castInteger == null) {
return result;
}
switch (castInteger) {
case ROUND:
return (double) Math.round(result);
case CEILING:
return Math.ceil(result);
case FLOOR:
return Math.floor(result);
default:
throw new UnsupportedFeatureException(target, castInteger);
}
}
private static ProbabilityDistribution getPriorProbabilities(Target target) {
ProbabilityDistribution result = new ProbabilityDistribution();
List<TargetValue> values = target.getTargetValues();
for (TargetValue value : values) {
// "The defaultValue attribute is used only if the optype of the field is continuous"
if (value.getDefaultValue() != null) {
throw new InvalidFeatureException(value);
}
String targetCategory = value.getValue();
Double probability = value.getPriorProbability();
if (targetCategory == null || probability == null) {
continue;
}
result.put(targetCategory, probability);
}
if (result.isEmpty()) {
return null;
}
return result;
}
public static TargetValue getTargetValue(Target target, Object value) {
DataType dataType = TypeUtil.getDataType(value);
List<TargetValue> targetValues = target.getTargetValues();
for (TargetValue targetValue : targetValues) {
if (TypeUtil.equals(
dataType, value, TypeUtil.parseOrCast(dataType, targetValue.getValue()))) {
return targetValue;
}
}
return null;
}
private static Double getDefaultValue(Target target) {
List<TargetValue> values = target.getTargetValues();
if (values.isEmpty()) {
return null;
} // End if
if (values.size() != 1) {
throw new InvalidFeatureException(target);
}
TargetValue value = values.get(0);
// "The value and priorProbability attributes are used only if the optype of the field is
// categorical or ordinal"
if (value.getValue() != null || value.getPriorProbability() != null) {
throw new InvalidFeatureException(value);
}
return value.getDefaultValue();
}