Question

我正在做一些事情，我需要一个观察者或监听器，当地图的EntrySet发生变化时会做出反应。我真的不知道为什么我的观察者没有反应。

首先，我有一个应该是Observable对象的StorageModel：

        public class StorageModel extends Observable{

        public SortedMap<String, Integer> coMap;
        public SortedMap<String, Integer> co2Map;

        private String id;

        public StorageModel(String id) {
            this.id = id;
            coMap = new TreeMap<>(Collections.reverseOrder());
            co2Map = new TreeMap<>(Collections.reverseOrder());

            Observer storageObserver = new Classificator(coMap, co2Map);

            addObserver(storageObserver);
        }

    public void writeToCoMap(SortedMap<String, Integer> map, String str, int val){
        map.put(str, val);
        listenToChangesInCo(map);
    }

    public void writeToCo2Map(SortedMap<String, Integer> map, String str, int val){
        map.put(str, val);
        listenToChangesInCo2(map);
    }

    public void listenToChangesInCo(SortedMap<String, Integer> map){
        setChanged();
        this.coMap = map;
        notifyObservers(coMap.entrySet());
    }

    public void listenToChangesInCo2(SortedMap<String, Integer> map){
        setChanged();
        this.co2Map = map;
        notifyObservers(co2Map.entrySet());
    }

}


public class Classificator implements ConstantFields, Runnable, Observer{

static Set<MeasurementModel> classifiedWaspmotes = new HashSet<>();
static Set<StorageModel> waspmotes = new HashSet<>();
private static SortedMap<String, Integer> coMap = new TreeMap<>();
private static SortedMap<String, Integer> co2Map = new TreeMap<>();

private static StorageModel observerableStorageModel;

public Classificator(SortedMap<String, Integer> coMap, SortedMap<String, Integer> co2Map){
    this.coMap = coMap;
    this.co2Map = co2Map;
}

@Override
public void update(Observable observable, Object o) {
    observerableStorageModel = (StorageModel) observable;
    System.out.println("reacting to changes");
}
}

在另一个处理来自无线模块的传入数据的功能中我想将已处理的数据写入现有地图，这是观察者应该做出反应的地方。

public void truncateMessage(String msg, String nodeID, SortedMap<String, Integer> coMap, SortedMap<String, Integer> co2map) throws InterruptedException {
    StorageModel mod = new StorageModel();
    mod.setId(nodeID);

    String message = msg;
    List<Integer> coValues = new ArrayList<>();
    List<Integer> co2Values = new ArrayList<>();

    String idStr = message.substring(0, 3);
    String digits = "";

    if(idStr.equals("CO_")){
        System.out.println("co found");
        System.out.println(message);
        message = cleanseMessage(message);
        System.out.println(message);

        addValuesToList(coValues, message);
        System.out.println("values found in list");
        System.out.println(coValues);

        for(int i: coValues){
            //coMap.put(sdf.format(new Date()), i);
            mod.writeToCoMap(coMap, sdf.format(new Date()), i);
            Thread.sleep(100);
        }
}

我真的很感谢你的帮助。

干杯

地图上的Java观察者

0 个答案: