ConstructionQueue.java

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package com.fs.starfarer.api.impl.campaign.econ.impl;
 
import java.util.ArrayList;
import java.util.List;
 
 
public class ConstructionQueue {
 
    public static class ConstructionQueueItem {
        public String id;
        public int cost;
        public ConstructionQueueItem(String id, int cost) {
            this.id = id;
            this.cost = cost;
        }
    }
    
    protected List<ConstructionQueueItem> items = new ArrayList<ConstructionQueueItem>();
    
    protected Object readResolve() {
        if (items == null) {
            items = new ArrayList<ConstructionQueueItem>();
        }
        return this;
    }
 
    public List<ConstructionQueueItem> getItems() {
        return items;
    }
    public void setItems(List<ConstructionQueueItem> items) {
        this.items = items;
    }
    
    public void addToEnd(String id, int cost) {
        ConstructionQueueItem item = new ConstructionQueueItem(id, cost);
        items.add(item);
    }
    
    public void moveUp(String id) {
        ConstructionQueueItem item = getItem(id);
        if (item == null) return;
        int index = items.indexOf(item);
        index--;
        if (index < 0) index = 0;
        items.remove(item);
        items.add(index, item);
    }
    
    public void moveDown(String id) {
        ConstructionQueueItem item = getItem(id);
        if (item == null) return;
        int index = items.indexOf(item);
        index++;
        items.remove(item);
        if (index > items.size()) index = items.size();
        items.add(index, item);
    }
    
    public void moveToFront(String id) {
        ConstructionQueueItem item = getItem(id);
        if (item == null) return;
        items.remove(item);
        items.add(0, item);
    }
    
    public void moveToBack(String id) {
        ConstructionQueueItem item = getItem(id);
        if (item == null) return;
        items.remove(item);
        items.add(item);
    }
    
    public void removeItem(String id) {
        items.remove(getItem(id));
    }
    
    public ConstructionQueueItem getItem(String id) {
        for (ConstructionQueueItem item : items) {
            if (item.id.equals(id)) return item;
        }
        return null;
    }
    
    public boolean hasItem(String id) {
        return getItem(id) != null;
    }
}