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package eu.equalparts.cardbase.filtering;
import java.lang.reflect.Field;
import java.util.Iterator;
import java.util.List;
import eu.equalparts.cardbase.card.Card;
import eu.equalparts.cardbase.cardfield.CardField;
import eu.equalparts.cardbase.cardfield.IntegerCardField;
import eu.equalparts.cardbase.comparator.SpecialFields.DirtyNumber;
import eu.equalparts.cardbase.filtering.Filter.FilterType;
import eu.equalparts.cardbase.utils.Utils;
/**
* Contains and equals are not case sensitive. Regex is.
*
* @author Eduardo Pedroni
*
*/
public class CardFiltering {
public static void filterByField(List<Card> cards, Filter filter) throws NoSuchFieldException {
Field fieldToFilter = Card.class.getDeclaredField(filter.fieldName);
try {
for (Iterator<Card> iterator = cards.iterator(); iterator.hasNext();) {
if (!((CardField<?>) fieldToFilter.get(iterator.next())).filter(filter)) {
iterator.remove();
}
}
} catch (IllegalAccessException e) {
System.out.println("Error: field " + fieldToFilter.getName() + " in Card is not visible.");
e.printStackTrace();
}
}
public static boolean isFilterValid(Filter filter) {
// Check the integrity of the filter object
if (filter == null || filter.fieldName == null || filter.value == null) {
return false;
}
// Check that the specified field exists
Field fieldToFilter;
try {
fieldToFilter = Card.class.getDeclaredField(filter.fieldName);
} catch (NoSuchFieldException | SecurityException e) {
return false;
}
// If filter is numeric, check that the field and value are valid
if (filter.type == FilterType.GREATER_THAN || filter.type == FilterType.SMALLER_THAN) {
// Check that the field is of type integer
if (!fieldToFilter.getType().equals(IntegerCardField.class)
&& !Utils.hasAnnotation(fieldToFilter, DirtyNumber.class)) {
return false;
}
// Check that the value is an integer
try {
Integer.parseInt(filter.value);
} catch (NumberFormatException e) {
return false;
}
}
return true;
}
}
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