Exception for the selectedItem of a custom macro based on a combobox (Cannot convert <Comboitem o2EQdh> of type class java.lang.String to class org.zkoss.zul.Comboitem)

asked 2015-03-31 10:25:44 +0800

viachris
27 ● 5

updated 2015-03-31 10:28:00 +0800

Hello everyone.

I created a macro component, that is basically a custom combobox that shows a message on focus.

The myCombobox.zul:

<zk>
    <combobox id="combobox" width="${empty arg.width ? '98%' : arg.width}" model="${arg.model}" mold="default" readonly="true" errorMessage="@load(vmsgs[self.parent])" />
</zk>

I use a custom java-class for it that implements HtmlMacroComponent:

@ComponentAnnotation({ "value:@ZKBIND(ACCESS=load,SAVE_EVENT=onEdited)", "selectedItem:@ZKBIND(ACCESS=both,SAVE_EVENT=onEdited)",
        "model:@ZKBIND(ACCESS=load,SAVE_EVENT=onEdited)" })
public class WegeCombobox extends HtmlMacroComponent {

    private static final long serialVersionUID = 1L;

    @Wire
    private Combobox combobox;

    public WegeCombobox() {
        setMacroURI("/zul/components/myCombobox.zul");
        setStyle("display:block");
        afterCompose();
    }

    @Listen("onFocus=#combobox")
    public void comboboxFocus() {
        Clients.showNotification("Some text",
                Clients.NOTIFICATION_TYPE_INFO, combobox, "end_before", 3000, true);
    }

    @Listen("onCreate=#combobox")
    public void comboboxCreate() {
        setModel((ArrayList<?>) getDynamicProperty("model"));
    }

    public void setValue(String value) {
        combobox.setValue(value);
    }

    public String getValue() {
        return combobox.getValue();
    }

    public void setSelectedItem(Comboitem fo) {
        combobox.setSelectedItem(fo);
    }

    public Comboitem getSelectedItem() {
        return combobox.getSelectedItem();
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public void setModel(ArrayList<?> model) {
        combobox.setModel(new ListModelList(model, true));
    }

    public ListModel<?> getModel() {
        return combobox.getModel();
    }


    @Listen("onChange=#combobox")
    public void comboboxChange() {
        Events.postEvent("onEdited", this, combobox.getSelectedItem());
        Events.postEvent("onEdited", this, combobox.getValue());
    }

}

I use it in my webpages like this:

<myCombobox id="myCB" selectedItem="@load(vm.bean.foo) @save(vm.bean.foo, before={'command1','command2'}) @validator('beanValidator')" value="@load(vm.bean.foo)" model="@bind(vm.someStringValuesAsArrayList)" />

After submitting the form i get the following error:

org.zkoss.zk.ui.UiException: Cannot convert <Comboitem o2EQdh> of type class java.lang.String to class org.zkoss.zul.Comboitem at [file:/zul/somePage.zul, line:54]
org.zkoss.zk.ui.UiException: Cannot convert <Comboitem o2EQdh> of type class java.lang.String to class org.zkoss.zul.Comboitem at [file:/zul/somePage.zul, line:54]
    at org.zkoss.bind.impl.MiscUtil.mergeExceptionInfo(MiscUtil.java:175)
    at org.zkoss.bind.impl.BindEvaluatorXImpl.setValue(BindEvaluatorXImpl.java:58)
    at org.zkoss.bind.impl.LoadPropertyBindingImpl.load(LoadPropertyBindingImpl.java:91)
    at org.zkoss.bind.impl.BinderImpl.doPropertyChange0(BinderImpl.java:388)
    at org.zkoss.bind.impl.BinderImpl.doPropertyChange(BinderImpl.java:365)
    at org.zkoss.bind.impl.BinderImpl.access$100(BinderImpl.java:106)
    at org.zkoss.bind.impl.BinderImpl$QueueListener.onEvent(BinderImpl.java:290)
    at org.zkoss.zk.ui.event.impl.DesktopEventQueue$QueueListener.onEvent(DesktopEventQueue.java:145)
    at org.zkoss.zk.ui.AbstractComponent.onEvent(AbstractComponent.java:2742)
    at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2713)
    at org.zkoss.zk.ui.AbstractComponent.service(AbstractComponent.java:2654)
    at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:136)
    at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1717)
    at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1502)
    at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1212)
    at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:600)
    at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:482)
    at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:491)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:315)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:722)
Caused by: org.zkoss.zel.ELException: Cannot convert <Comboitem o2EQdh> of type class java.lang.String to class org.zkoss.zul.Comboitem
    at org.zkoss.zel.impl.lang.ELSupport.coerceToTypeForSetValue(ELSupport.java:485)
    at org.zkoss.zel.impl.parser.AstValue.setValue(AstValue.java:245)
    at org.zkoss.zel.impl.ValueExpressionImpl.setValue(ValueExpressionImpl.java:256)
    at org.zkoss.xel.zel.ELXelExpression.setValue(ELXelExpression.java:50)
    at org.zkoss.bind.impl.BindEvaluatorXImpl.setValue(BindEvaluatorXImpl.java:55)
    ... 37 more

How can i fix this: "Cannot convert <comboitem o2eqdh=""> of type class java.lang.String to class org.zkoss.zul.Comboitem" ?