第一个项目取消选择事件中的空值 素数面自动完成

Question

我在使用素数面 p：autoComplete 时遇到了一个奇怪的情况。我把这段代码放在一个 xhtml 文件中，在一个 h：form 标签内：

<p:autoComplete id="to" 
multiple="true" 
value="#{editEmailComponent.receiversEntitiesToDummy}" 
completeMethod="#{editEmailComponent.completeQuery}"
emptyMessage="#{text['list.empty']}"                                            
var="ent"
itemLabel="#{ent.class.simpleName eq 'EntityGroupHeader'? ent.design : (ent.class.simpleName eq 'EntityContactList'? ent.email : ent.abstractEntityEmail)}"
itemValue="#{ent}"
forceSelection="true"
cache="false"
styleClass="full-width"
autocomplete="none">
<o:converter converterId="omnifaces.ListConverter" 
list="#{editEmailComponent.receiversAllConverter}" />
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="# #{ent.number}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityGroupHeader'}" value="# #{ent.design}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.nif}" />
</p:column>
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="#{ent.abstractEntityDesignation}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.designation}" />
</p:column>
<p:column>
<h:outputText rendered="#{(ent.class.simpleName ne 'EntityGroupHeader') and (ent.class.simpleName ne 'EntityContactList')}" value="#{ent.abstractEntityEmail}" />
<h:outputText rendered="#{ent.class.simpleName eq 'EntityContactList'}" value="#{ent.email}" />
</p:column>
<p:ajax event="query" process="@this"/>
<p:ajax event="itemSelect" process="@form" listener="#{editEmailComponent.onItemSelectTo}" update="to" />
<p:ajax event="itemUnselect" process="@form" listener="#{editEmailComponent.onItemUnselectTo}" update="to" />
</p:autoComplete>

与此项目取消选择事件关联的操作是：

public void onItemUnselectTo(UnselectEvent event) {
onItemUnselect(receiversEntitiesToDummy, event);
BaseObject obj2 = (BaseObject) event.getObject();
//Instancia da entidade e converter para receiver
if(obj2 instanceof EntityContactList){
EntityContactList aux = (EntityContactList) obj2;
for(Receiver rec : receiversTo)
if(rec.getEntity().equals(aux.getEntity()))
receiversTo.remove(rec);
}
private static void onItemUnselect(List<BaseObject> list, UnselectEvent event) {        
BaseObject obj = (BaseObject) event.getObject();   
list.remove(obj);        
}

我像这样初始化此自动完成的列表：

private List<BaseObject> receiversEntitiesToDummy = new ArrayList<>();
...
EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
receiversEntitiesToDummy.add(result);

因此，当我删除第一个元素时，"obj2">

为空，但是当我搜索并选择某个对象时，"obj2"被正确填充。有人知道为什么会这样吗？

注意：我使用的是素数 5.2。

Answer 1

我解决了更改使用第一个元素填充列表的方式的问题。

取而代之的是：

private List<BaseObject> receiversEntitiesToDummy = new ArrayList<>();
...
EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
receiversEntitiesToDummy.add(result);

我使用查询函数放置第一个元素，它可以工作。

EntityContactList result = entityManager.getEntityContactList(receiver.getEntity(),null);
List<BaseObject> aux = new ArrayList<>();
if(receiver.getEntity().getAbstractEntityEmail() != null)
aux = completeQuery(receiver.getEntity().getAbstractEntityEmail());
if(aux.contains(result)){
int num = aux.indexOf(result);
EntityContactList another =  (EntityContactList) aux.get(num);
receiversEntitiesToDummy.add(another);
}