blob: f265d24a4d253dc32797b9f700998faf24954f25 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
package eu.equalparts.cardbase.cardstorage;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonProperty;
import eu.equalparts.cardbase.cards.Card;
/**
* A class which holds card counts by reference (hash).
*
* @author Eduardo Pedroni
*
*/
public abstract class ReferenceCardContainer {
/**
* A map with card hashes as entry keys (calculated used {@code Card.hashCode()}) and card amounts as entry values.
*/
@JsonProperty private Map<Integer, Integer> cardReferences = new HashMap<>();
/**
* Returns the amount of the specified card. If the card is not present at all, return 0.
*
* @param cardToCount a card whose count is to be returned.
* @return the count of the returned card in the container.
*/
public int getCount(Card cardToCount) {
int hashCode = cardToCount.hashCode();
return cardReferences.containsKey(hashCode) ? cardReferences.get(hashCode) : 0;
}
/**
* @param cardToAdd the card to add the container.
* @param count the amount to add.
*/
public void addCard(Card cardToAdd, int count) {
int hashCode = cardToAdd.hashCode();
if (cardReferences.containsKey(hashCode)) {
cardReferences.replace(hashCode, cardReferences.get(hashCode) + count);
} else {
cardReferences.put(hashCode, count);
}
}
/**
* @param cardToRemove the card to remove from the container.
* @param count the amount to remove.
* @return the amount that was effectively removed. Could be less than {@code count} depending on how many of the card were present.
*/
public int removeCard(Card cardToRemove, int count) {
int hashCode = cardToRemove.hashCode();
int removed = 0;
if (cardReferences.containsKey(hashCode) && count > 0) {
int oldCount = cardReferences.get(hashCode);
if (oldCount > count) {
cardReferences.replace(hashCode, oldCount - count);
removed = count;
} else {
cardReferences.remove(hashCode);
removed = oldCount;
}
}
return removed;
}
}
|
