private void applyDecreaseQualityPolicies() {
final boolean minQualityNotReached = item.quality > MIN_QUALITY;
if (minQualityNotReached) {
if (isBrie()) return;
if (isBackstage()) {
if (item.sellIn <= SELL_BY_DATE_LIMIT) {
item.quality = 0;
}
return;
}
if (item.sellIn <= SELL_BY_DATE_LIMIT) {
decreaseQuality();
}
decreaseQuality();
}
}
void decreaseQualityBy(int amount) {
if (getQuality() > 0) {
item.quality = item.quality - amount;
}
}
void setQualityToZero() {
item.quality = 0;
}
void increaseQualityBy(int amount) {
if (isNotTopQuality()) {
item.quality = item.quality + amount;
}
}
private void decreaseQuality() {
item.quality = item.quality - QUALITY_UNIT;
}
private void increaseQuality() {
item.quality = item.quality + QUALITY_UNIT;
}