uml/src/model/InventoryManager.java

package model;

import java.util.HashMap;
import java.util.Map;

public class InventoryManager {
    private Map<String, Integer> inventory;

    public InventoryManager() {
        inventory = new HashMap<>();
    }

    public void addOrUpdateInventory(String goodsId, int quantity) {
        inventory.put(goodsId, inventory.getOrDefault(goodsId, 0) + quantity);
    }

    public void removeOrUpdateInventory(String goodsId, int quantity) {
        if (inventory.containsKey(goodsId)) {
            int currentQuantity = inventory.get(goodsId);
            if (currentQuantity >= quantity) {
                inventory.put(goodsId, currentQuantity - quantity);
            } else {
                throw new IllegalArgumentException("库存不足");
            }
        } else {
            throw new IllegalArgumentException("货物不存在");
        }
    }

    public int getInventoryQuantity(String goodsId) {
        return inventory.getOrDefault(goodsId, 0);
    }

    public void processInboundRecord(InboundRecord record) {
        addOrUpdateInventory(record.getGoodsId(), record.getQuantity());
    }

    public void processOutboundRecord(OutboundRecord record) {
        removeOrUpdateInventory(record.getGoodsId(), record.getQuantity());
    }
}