After endless reading of posts here, especially answers from @BalusC I still couldn't solve the following problem.
I have the following composite component:
<ui:component xmlns="http://www.w3.org/1999/xhtml"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:cc="http://java.sun.com/jsf/composite"
xmlns:p="http://primefaces.org/ui">
<cc:interface componentType="testComponent">
<!-- Define component attributes here -->
<cc:attribute name="clientId"/>
</cc:interface>
<cc:implementation>
<div id="#{cc.clientId}">
<div id="test" style="min-width: 310px; height: 500px; margin: 0 auto">1</div>
<script type="text/javascript">
$('#test').text('#{cc.tagList}');
alert('#{cc.tagList}');
</script>
</div>
</cc:implementation>
</ui:component>
This is implementation of @FacesComponent("testComponent')
@FacesComponent("testComponent")
public class TestComponent extends UINamingContainer{
public String getTagList(){
List<Tag> tags = (List<Tag>)getAttributes().get("tags");
String result = "Tags are: ";
for(Tag tag : tags){
result += tag.getName();
}
return result;
}
}
And this is *.jsf page from which I trying to use this custom component
<h:form>
<p:selectCheckboxMenu id="tags_selector"
converter="#{tagConverter}"
value="#{tagsRequestsBean.selectedTags}" label="Tag"
filter="true"
filterMatchMode="startsWith"
panelStyle="width:250px">
<f:selectItems value="#{tagsRequestsBean.tags}" var="tag" itemValue="#{tag}" itemLabel="#{tag.name}" />
<f:ajax event="change" render="test"></f:ajax>
</p:selectCheckboxMenu>
<hc:test_component id="test" tags="#{tagsRequestsBean.selectedTags}"></hc:test_component>
</h:form>
what am trying to do is to update testComponent when I select tags by p:selectCheckboxMenu, but when I perform selection I get the following error:
javax.faces.FacesException: java.lang.NullPointerException
at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.wrap(ExceptionHandlerImpl.java:241)
at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.handle(ExceptionHandlerImpl.java:156)
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:192)
at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:119)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1230)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:779)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478)
at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1071)
at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:914)
at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:200)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:453)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:515)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:306)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:277)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1702)
Caused by: java.lang.NullPointerException
at javax.faces.component._SelectItemsUtil.matchValue(_SelectItemsUtil.java:67)
at javax.faces.component.UISelectMany.validateValue(UISelectMany.java:366)
at javax.faces.component.UIInput.validate(UIInput.java:627)
at javax.faces.component.UISelectMany.validate(UISelectMany.java:392)
at javax.faces.component.UIInput.processValidators(UIInput.java:281)
at org.apache.myfaces.context.servlet.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:550)
at org.apache.myfaces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:207)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:773)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1051)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1051)
at javax.faces.component.UIForm.visitTree(UIForm.java:290)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1051)
at javax.faces.component.UIComponent.visitTree(UIComponent.java:793)
at javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1051)
at org.apache.myfaces.context.servlet.PartialViewContextImpl.processPartialExecute(PartialViewContextImpl.java:379)
at org.apache.myfaces.context.servlet.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:359)
at org.primefaces.context.PrimePartialViewContext.processPartial(PrimePartialViewContext.java:60)
at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:88)
at javax.faces.component.UIViewRoot$ProcessValidatorPhaseProcessor.process(UIViewRoot.java:1394)
at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1282)
at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:758)
at org.apache.myfaces.lifecycle.ProcessValidationsExecutor.execute(ProcessValidationsExecutor.java:34)
at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:172)
... 25 more
What am I doing wrong?
UPDATE: I'm using JSF 2.0 Apache MyFaces 2.0.3 on Websphere 8.0.0.9
As @dognose suggested in him comment it was an issue of a converter. I've implemented getAsString method, but forget to implement getAsObject method and it always returned null. So, I now fixed it and it works like it should.