GWT編輯器和獲取/設置值

Question

我有以下編輯器類，我很好奇它有什麼問題。運行時，它確實將正確的單選按鈕設置爲選定狀態。但是，在刷新頂級編輯器時，getValue永遠不會被調用，並且我的對象的屬性永遠不會更新。下面的代碼（提示 - 修改ValueListBox）：

public class ValueRadioList<T> extends FlowPanel implements 
     HasConstrainedValue<T>, LeafValueEditor<T>, ValueChangeHandler<Boolean> { 

    private final List<T> values = new ArrayList<T>(); 
    private final Map<Object, Integer> valueKeyToIndex = 
      new HashMap<Object, Integer>(); 

    private final String name; 
    private final Renderer<T> renderer; 
    private final ProvidesKey<T> keyProvider; 

    private T value; 

    public ValueRadioList(Renderer<T> renderer) { 
     this(renderer, new SimpleKeyProvider<T>()); 
    } 

    public ValueRadioList(Renderer<T> renderer, ProvidesKey<T> keyProvider) { 
     super(); 
     this.name = DOM.createUniqueId(); 
     this.keyProvider = keyProvider; 
     this.renderer = renderer; 
    } 

    private void addValue(T value) { 
     Object key = keyProvider.getKey(value); 
     if (valueKeyToIndex.containsKey(key)) { 
      throw new IllegalArgumentException("Duplicate value: " + value); 
     } 

     valueKeyToIndex.put(key, values.size()); 
     values.add(value); 
     RadioButton radio = new RadioButton(name, renderer.render(value)); 
     radio.addValueChangeHandler(this); 
     add(radio); 
     assert values.size() == getWidgetCount(); 
    } 

    @Override public HandlerRegistration addValueChangeHandler(
      ValueChangeHandler<T> handler) { 
     return addHandler(handler, ValueChangeEvent.getType()); 
    } 

    @Override public T getValue() { 
     return value; 
    } 

    @Override public void onValueChange(ValueChangeEvent<Boolean> event) { 
     int selectedIndex = -1; 
     for (int i = 0, l = getWidgetCount(); i < l; i++) { 
      if (((RadioButton) getWidget(i)).getValue()) { 
       selectedIndex = i; 
       break; 
      } 
     } 

     if (selectedIndex < 0) { 
      return; // Not sure why this happens during addValue 
     } 
     T newValue = values.get(selectedIndex); 
     setValue(newValue, true); 
    } 

    @Override public void setAcceptableValues(Collection<T> newValues) { 
     values.clear(); 
     valueKeyToIndex.clear(); 
     clear(); 

     for (T nextNewValue : newValues) { 
      addValue(nextNewValue); 
     } 

     updateRadioList(); 
    } 

    @Override public void setValue(T value) { 
     setValue(value, false); 
    } 

    @Override public void setValue(T value, boolean fireEvents) { 
     if (value == this.value 
       || (this.value != null && this.value.equals(value))) { 
      return; 
     } 

     T before = this.value; 
     this.value = value; 
     updateRadioList(); 

     if (fireEvents) { 
      ValueChangeEvent.fireIfNotEqual(this, before, value); 
     } 
    } 

    private void updateRadioList() { 
     Object key = keyProvider.getKey(value); 
     Integer index = valueKeyToIndex.get(key); 
     if (index == null) { 
      addValue(value); 
     } 

     index = valueKeyToIndex.get(key); 
     ((RadioButton) getWidget(index)).setValue(true); 
    } 
} 

Answer 1

解決了這個問題，我的POJO錯過了該領域的引領者。