private BigDecimal calculateOverAmount(Item item, int overStock) throws UserException {
BigDecimal amount = BigDecimal.valueOf(0);
int excess = overStock;
List<ItemStock> itemStocks = item.getItemStocks();
for (int i = itemStocks.size() - 1; i >= 0 && excess > 0; --i) {
ItemStock itemStock = itemStocks.get(i);
int maxStock = itemStock.getPurchaseDetail().getQuantity();
int stock = itemStock.getQuantity();
int taken;
if ((excess + stock) > maxStock) {
taken = maxStock - stock;
} else {
taken = excess;
}
int remain = excess - taken;
int newStock = stock + taken;
itemStock.setQuantity(newStock);
excess = remain;
amount =
amount.add(
BigDecimal.valueOf(taken).multiply(itemStock.getPurchaseDetail().getPricePerUnit()));
}
if (excess > 0) {
int maxStockLimit = ItemFacade.getInstance().calculateMaxStock(item);
throw new UserException(
"Batas penyesuaian stock untuk item "
+ item.getCode()
+ " "
+ item.getName()
+ " hanya bisa disesuaikan hingga "
+ maxStockLimit
+ " "
+ item.getUnit()
+ ".<br/><br/>"
+ "Kelebihan "
+ excess
+ " "
+ item.getUnit()
+ " harus dilakukan melalui menu Transaksi Pembelian.");
}
return amount;
}
private BigDecimal calculateLossAmount(Item item, int lossStock) {
BigDecimal amount = BigDecimal.valueOf(0);
int requirement = lossStock;
List<ItemStock> itemStocks = item.getItemStocks();
for (int i = 0; i < itemStocks.size() && requirement > 0; ++i) {
ItemStock itemStock = itemStocks.get(i);
int stock = itemStock.getQuantity();
int taken;
if (requirement > stock) {
taken = stock;
requirement -= stock;
} else {
taken = requirement;
requirement = 0;
}
int remain = stock - taken;
itemStock.setQuantity(remain);
amount =
amount.add(
BigDecimal.valueOf(taken).multiply(itemStock.getPurchaseDetail().getPricePerUnit()));
}
return amount;
}