EpicHoppers/EpicHoppers-API/src/main/java/com/craftaro/epichoppers/hopper/Filter.java

package com.craftaro.epichoppers.hopper;

import org.bukkit.Location;
import org.bukkit.inventory.ItemStack;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Filter {
    private List<ItemStack> whiteList = new ArrayList<>();
    private List<ItemStack> blackList = new ArrayList<>();
    private List<ItemStack> voidList = new ArrayList<>();

    private List<ItemStack> autoSellWhiteList = new ArrayList<>();
    private List<ItemStack> autoSellBlackList = new ArrayList<>();

    private Location endPoint;

    public List<ItemStack> getWhiteList() {
        return this.whiteList != null ? this.whiteList : Collections.emptyList();
    }

    public void setWhiteList(List<ItemStack> whiteList) {
        this.whiteList = whiteList;
    }

    public List<ItemStack> getBlackList() {
        return this.blackList != null ? this.blackList : Collections.emptyList();
    }

    public void setBlackList(List<ItemStack> blackList) {
        this.blackList = blackList;
    }

    public List<ItemStack> getVoidList() {
        return this.voidList != null ? this.voidList : Collections.emptyList();
    }

    public void setVoidList(List<ItemStack> voidList) {
        this.voidList = voidList;
    }

    public List<ItemStack> getAutoSellWhiteList() {
        return this.autoSellWhiteList != null ? this.autoSellWhiteList : Collections.emptyList();
    }

    public void setAutoSellWhiteList(List<ItemStack> autoSellWhiteList) {
        this.autoSellWhiteList = autoSellWhiteList;
    }

    public List<ItemStack> getAutoSellBlackList() {
        return this.autoSellBlackList != null ? this.autoSellBlackList : Collections.emptyList();
    }

    public void setAutoSellBlackList(List<ItemStack> autoSellBlackList) {
        this.autoSellBlackList = autoSellBlackList;
    }

    public Location getEndPoint() {
        return this.endPoint;
    }

    public void setEndPoint(Location endPoint) {
        this.endPoint = endPoint;
    }

    public void addItem(ItemStack item, ItemType type) {
        switch (type) {
            case WHITELIST:
                this.whiteList.add(item);
                break;

            case BLACKLIST:
                this.blackList.add(item);
                break;

            case VOID:
                this.voidList.add(item);
                break;

            case AUTO_SELL_WHITELIST:
                this.autoSellWhiteList.add(item);
                break;

            case AUTO_SELL_BLACKLIST:
                this.autoSellBlackList.add(item);
                break;
        }
    }
}