I have this ViewModel:
package mx.mindwork.relativity6.controllers.clients;
import java.util.ArrayList; import java.util.List;
import org.zkoss.bind.annotation.Command; import org.zkoss.bind.annotation.Init; import org.zkoss.zk.ui.Executions;
import mx.mindwork.relativity6.models.clients.Client;
public class ClientListVM {
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private List<Client> clients;
private int selectedIndex;
@Init
public void init() {
clients = new ArrayList<>();
}
@Command
public void newClient(){
Executions.sendRedirect("/clients/clientsForm.zul");
}
public List<Client> getClients() {
return clients;
}
public int getSelectedIndex() {
return selectedIndex;
}
public void setSelectedIndex(int selectedIndex) {
this.selectedIndex = selectedIndex;
}
}
And this view:
<zk xmlns:n="native">
If I use as is, I get this error:
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 java.util.ArrayList.rangeCheck(ArrayList.java:653) java.util.ArrayList.get(ArrayList.java:429) org.zkoss.zul.ListModelList.getElementAt(ListModelList.java:156) org.zkoss.bind.converter.sys.AbstractSelectedIndexConverter.coerceToUi(AbstractSelectedIndexConverter.java:50) org.zkoss.bind.impl.LoadPropertyBindingImpl.load(LoadPropertyBindingImpl.java:74) org.zkoss.bind.impl.PropertyBindingHandler.doLoadBinding(PropertyBindingHandler.java:133) org.zkoss.bind.impl.PropertyBindingHandler.doLoad(PropertyBindingHandler.java:334) org.zkoss.bind.impl.BinderImpl.loadComponentProperties0(BinderImpl.java:2307) org.zkoss.bind.impl.BinderImpl.loadComponent0(BinderImpl.java:2276) org.zkoss.bind.impl.BinderImpl.loadComponent0(BinderImpl.java:2281) org.zkoss.bind.impl.BinderImpl.loadComponent(BinderImpl.java:2215) org.zkoss.bind.BindComposer$BinderKeeper$Loader.load(BindComposer.java:575) org.zkoss.bind.BindComposer$BinderKeeper.loadComponentForAllBinders(BindComposer.java:551) org.zkoss.bind.BindComposer.doAfterCompose(BindComposer.java:190) org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:588) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild0(UiEngineImpl.java:931) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:877) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:748) org.zkoss.zk.ui.impl.UiEngineImpl.execCreateChild(UiEngineImpl.java:822) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate0(UiEngineImpl.java:771) org.zkoss.zk.ui.impl.UiEngineImpl.execCreate(UiEngineImpl.java:709) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage0(UiEngineImpl.java:452) org.zkoss.zk.ui.impl.UiEngineImpl.execNewPage(UiEngineImpl.java:358) org.zkoss.zk.ui.http.DHtmlLayoutServlet.process(DHtmlLayoutServlet.java:217) org.zkoss.zk.ui.http.DHtmlLayoutServlet.doGet(DHtmlLayoutServlet.java:136) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
If I create some dummy data and add to the clients array, works as expected. Any hints to make this work with empty array?
After some debuggin I found the cause of the problem. selectedIndex by default is 0 and is causing all the troubles because the models wants to put 0 as selected in empty model. If you add selectedindex = -1; in the init the thing works as expected.
isn't it easier to use selectedItem in stead of selectedIndex? selectedItem is in your VM a Client and you just need to provide a getter and setter for it. null value => same as -1.
Asked: 2016-03-08 22:48:17 +0800
Seen: 23 times
Last updated: Mar 10 '16
Hello! Which ZK version are you using? i tested your code with ZK8 and i cannot reproduce - it works like a charm even when the list is empty.
gganassin ( 2016-03-09 14:50:18 +0800 )editI'm using ZK 8.0.0.
arcangelSalazar ( 2016-03-10 21:23:55 +0800 )editNo, the same error with ZK 8.0.1.1 CE (build: 2016020312)
arcangelSalazar ( 2016-03-10 22:50:38 +0800 )edit