Primefaces:Orderlist:重新排序时索引越界异常

除了关于订单列表的问题，我还遇到了一个新问题，我不明白。 显示、添加和删除我的订单列表的数据效果很好

但是我如何在orderlist中对数据重新排序并存储它们呢

如果我使用orderlist的标准功能，抓取一个项目并将其拉到另一个位置。在我将项目释放到所需位置后，它会跳回原来的位置，我会得到一个索引越界异常

谁能告诉我这里出了什么问题：

technikers在我的实体中只是一个普通的ArrayList

XML:

我自己解决了；-）

解决方案是指定p:dropable的范围和相应的p:draggable

<p:droppable id="technikerDrop" for="technikersTable" tolerance="touch" activeStyleClass="ui-state-highlight" datasource=":systemLandschaftTabView:sysObjektDetailPanelForm:userTable" scope="userDraggable"> 
                <p:ajax listener="#{systemlandschaftRessourceHandler.onDropTechniker}" update="@form" /> 
        </p:droppable> 

    DEBUG 2013-10-16 11:13:53,899 [EntityManagerProducer] EntityManager geschlossen.
 INFO 2013-10-16 11:16:16,783 [context] java.lang.ArrayIndexOutOfBoundsException: -1: java.lang.ArrayIndexOutOfBoundsException: -1
    at org.primefaces.component.dnd.Droppable.queueEvent(Droppable.java:201)
    at org.primefaces.component.behavior.ajax.AjaxBehaviorRenderer.decode(AjaxBehaviorRenderer.java:42)
    at javax.faces.component.behavior.ClientBehaviorBase.decode(ClientBehaviorBase.java:132)
    at org.primefaces.renderkit.CoreRenderer.decodeBehaviors(CoreRenderer.java:378)
    at org.primefaces.component.dnd.DroppableRenderer.decode(DroppableRenderer.java:32)
    at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:787)
    at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1181)
    at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:506)
    at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1612)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIForm.visitTree(UIForm.java:371)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at org.primefaces.component.tabview.TabView.visitTree(TabView.java:419)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1623)
    at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
    at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
    at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
    at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
    at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at org.apache.myfaces.extensions.cdi.jsf2.impl.listener.phase.CodiLifecycleWrapper.execute(CodiLifecycleWrapper.java:95)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:329)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at com.ocpsoft.pretty.PrettyFilter.doFilter(PrettyFilter.java:118)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at de.company.sessioninfo.HttpSessionUserFilter.doFilter(HttpSessionUserFilter.java:42)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:101)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:165)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:372)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:679)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:931)
    at java.lang.Thread.run(Thread.java:722)

<p:droppable id="technikerDrop" for="technikersTable" tolerance="touch" activeStyleClass="ui-state-highlight" datasource=":systemLandschaftTabView:sysObjektDetailPanelForm:userTable" scope="userDraggable"> 
                <p:ajax listener="#{systemlandschaftRessourceHandler.onDropTechniker}" update="@form" /> 
        </p:droppable>