我有一个带有延迟加载数据表的复合组件。我需要在同一页面上多次渲染此组件。我还需要在表上启用单行选择。问题是在rowSelect事件中,只有页面上最后呈现的表返回所选对象,其他表返回null。
组件kwe:lazytable:
<composite:interface>
<composite:attribute name="bean" required="true" />
<composite:attribute name="groupId" required="true" />
</composite:interface>
<composite:implementation>
<p:dataTable id="entityTable" widgetVar="entityTable" var="entity" value="#{cc.attrs.bean.loadEntities(cc.attrs.groupId)}"
rows="5" resizableColumns="true" lazy="true" selectionMode="single">
<p:ajax event="rowSelect" listener="#{cc.attrs.bean.onRowSelect}" />
...
</p:dataTable>
</composite:implementation>
多次渲染:
<kwe:lazytable bean="#{cc.attrs.bean}" groupId="#{1}" />
<kwe:lazytable bean="#{cc.attrs.bean}" groupId="#{2}" />
<kwe:lazytable bean="#{cc.attrs.bean}" groupId="#{3}" />
在支持bean中,LazyDataModels存储在map:
中@ManagedBean
@ViewScoped
public class SearchBean {
private Map<Integer, LazyEntitiesDataModel> lazyEntitiesMap = new HashMap<>();
public LazyDataModel<T> loadEntities(int groupId) {
LazyEntitiesDataModel entities = lazyEntitiesMap.get(groupId);
if (entities == null) {
entities = new LazyEntitiesDataModel();
lazyEntitiesMap.put(groupId, entities);
}
return entities;
}
public void onRowSelect(SelectEvent event) {
System.out.println(event.getObject());
}
}
如果我将selection="#{cc.attrs.bean.selectedentity}"
放在数据表声明中,就会发生同样的事情。仅在从最后一个表中选择一行时填充它。
有人知道为什么这不起作用吗?