dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.dictionary;
 
import java.util.Iterator;
 
import foundation.data.entity.IDictionary;
import foundation.data.entity.IDictionaryBucket;
import foundation.json.IJSONProvider;
import foundation.json.IJSONWriter;
import foundation.util.MapList;
 
public class DictionaryBucket extends IDictionaryBucket implements Iterable<IDictionary>, IJSONProvider {
 
    private static DictionaryBucket instance;
    private MapList<String, IDictionary> items;
    private Dictionary cached;
    
    private DictionaryBucket() {
        items = new MapList<String, IDictionary>();
    }
    
    public static DictionaryBucket getInstance() {
        return instance;
    }
    
    public static DictionaryBucket newInstance() {
        return new DictionaryBucket();
    }
    
    public void activate() {
        instance = this;
        IDictionaryBucket.registerActive(this);
    }
 
    @Override
    public IDictionary getDictionary(String id) {
        IDictionary dictionary = items.get(id);
        return dictionary;
    }
 
    public Dictionary getCachedOne(String id) {
        if (id == null) {
            return null;
        }
        
        if (cached != null && id.equals(cached.getId())) {
            return cached;
        }
        
        cached = (Dictionary)getDictionary(id);
        return cached;
    }
 
    public void loadOne(IDictionary dictionary) {
        items.add(dictionary.getId(), dictionary);
    }
 
    @Override
    public void writeJSON(IJSONWriter writer) {
        writer.beginArray();
        
        for (IDictionary dictionary: items) {
            writer.beginObject();
            dictionary.writeJSONBody(writer);
            writer.endObject();
        }
        
        writer.endArray();
    }
 
    @Override
    public Iterator<IDictionary> iterator() {
        return items.iterator();
    }
}