componentState of ExtendedDataTable

[nimo22]

I have a rich:extendedDataTable:

<rich:extendedDataTable id="myDataTable" componentState="#{myBean.myDataTable}"
id="dataTableViewApplications" value="#{myBean.myList}" var="list"
tableState="#{myBean.myTableState}">
 ..
</rich:extendedDataTable>

now I want to get this instance by code (without using binding-attribute!):

I guess, there are only two alternatives:

- via findComponent
- via componentState (???)


I click the button:

<a4j:commandButton action="#{myBean.snapshotDataTable}" value="Get my datatable"/>

Look at my code:

public void snapshotDataTable()
{
FacesContext context = FacesContext.getCurrentInstance();
UIViewRoot view = context.getViewRoot();

log.info("CLASS FOUND: #0", view.findComponent(":form:myDataTable").getClass());

HtmlExtendedDataTable myDT = (HtmlExtendedDataTable) view.findComponent(":form:myDataTable");

 }

Look at my log-file:

10:58:38,435 INFO [MyBean] CLASS FOUND: org.richfaces.component.html.HtmlExtendedDataTable
10:58:38,451 FATAL [application] java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable
javax.faces.el.EvaluationException: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable
 at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)

You see, even I have found the right class "HtmlExtendedDataTable", it cannot be casted. Why? How can I solve that?

(By the way, for what is the attribute "componentState" ???
I bound it to a HtmlExtendedDataTable-Instance, but it does not work. So I used the findComponent-Approach, which does not work, either:-(

[ilya_shaikovsky]

use tableState and explore please API docs for ExtendedDataTableState class. You should bind the table state to the object of this class.

[nimo22]

I know the ExtendedDataTableState-API and the HtmlExtendedDataTable.

I want to make use of the method .getTableState of HtmlExtendedDataTable or vice versa .getExtendedDataTableState of ExtendedDataTableState.

You should bind the table state to the object of this class.

Yes, I know. Have done that and it works.

But my Problem is described as the topic above, I want to have access to my HtmlExtendedDataTable but have a class-cast-ex even I have the right class (I do not want to use binding-property!):

// throws class cast ex
HtmlExtendedDataTable myDT = (HtmlExtendedDataTable) view.findComponent(":form:myDataTable");

// throws class cast ex
ExtendedDataTableState.getExtendedDataTableState((UIExtendedDataTable) view.findComponent(":form:myDataTable"));

I want to have a button which saves the current table state programmatically, so I guess, I need to have access to my datatable instance via code. Or?

[nimo22]

The table-state changes when the user changes the state of the datatable.

Imagine, I want to make restore-points, the user can click from a list all available table-states and then the table-state switches.

The only problem is, I want to controll, when a table state should be saved.

So I need a button "save State"..hence I need access to my datatable via code and get the class cast ex. (I do not want to use binding!)

[ilya_shaikovsky]

Which project packaging you use? EAR, war? If EAR seems you just placed RF jars in wrong places. the exception could be appeared because of different class loaders problem.

[nimo22]

I use a EAR:

in my EAR:

richfaces-api-*.jar
richfaces-impl-*.jar
richfaces-ui-*.jar

in my WAR:

richfaces-impl-*.jar
richfaces-ui-*.jar

I use richfaces 3.3.0.

[ilya_shaikovsky]

should be

in my EAR:

richfaces-api-*.jar

only.

[nimo22]

I changed it but it does not help:

Caused by: javax.faces.el.EvaluationException: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable
 at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
 at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
 ... 54 more
Caused by: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable

but it s definitly the same class:

10:58:38,435 INFO [MyBean] CLASS FOUND: org.richfaces.component.html.HtmlExtendedDataTable

[nbelaevski]

"nimo22" wrote:
I changed it but it does not help:

Caused by: javax.faces.el.EvaluationException: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable
 at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
 at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
 ... 54 more
Caused by: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable

but it s definitly the same class:

10:58:38,435 INFO [MyBean] CLASS FOUND: org.richfaces.component.html.HtmlExtendedDataTable

How about #getClassLoader() call? Will it return the same values?

[nimo22]

Hey ilya:

should be

Quote:

in my EAR:

richfaces-api-*.jar


only.

When I ommit the from my EAR (!)

then I get this failure:

Caused by: java.lang.NoClassDefFoundError: org/richfaces/component/html/HtmlExtendedDataTable
 at java.lang.Class.getDeclaredMethods0(Native Method)
 at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
 at java.lang.Class.privateGetPublicMethods(Unknown Source)
 at java.lang.Class.getMethods(Unknown Source)
 at org.jboss.seam.Component.hasAnnotation(Component.java:1119)
 at org.jboss.seam.Component.<init>(Component.java:232)
 at org.jboss.seam.Component.<init>(Component.java:219)
 at org.jboss.seam.init.Initialization.addComponent(Initialization.java:998)
 ... 93 more

So I put this in my EAR:

richfaces-api-*.jar
richfaces-impl-*.jar
richfaces-ui-*.jar

then no java.lang.NoClassDefFoundError occurs.

In my WAR all three are in, too. (I have definitly a EAR-Project!)

Hello nbelaevski (how are u?:)

well I my classLoader:

07:42:05,398 INFO [MyBean] class loader: WebappClassLoader
 delegate: false
 repositories:
 /WEB-INF/classes/
----------> Parent Classloader:
java.net.FactoryURLClassLoader@42c93e

07:42:05,398 FATAL [application] java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable
javax.faces.el.EvaluationException: java.lang.ClassCastException: org.richfaces.component.html.HtmlExtendedDataTable

[nimo22]

When I only have the richfaces-api-*.jar in my EAR, then I get a java.lang.NoClassDefFoundError.

So I put all three jars in it and then no "NoClassDefFoundError" occurs.

(I use SEAM 2.1 and my EAR was created by SEAM!)

[ramkumarps]

hey Stephan,

this problem is happening bcos of two different Jar files are there in ur EAR, one in EAR/Lib and other in Web-inf/lib

use this below snipet in WAR project

public void resetDataTable(){

                    UIComponent uiCombo = FacesContext.getCurrentInstance().getViewRoot().findComponent("mediationBeanForm:fileListDiv:fileListTable");

                    if(uiCombo!=null){

                              HtmlExtendedDataTable table = (HtmlExtendedDataTable) uiCombo;

                              Iterator<UIComponent> itr = table.columns();

                              System.out.println("table.getTableState() : "+table.getTableState());

                              if(itr!=null)

                              while(itr.hasNext()){

                                        UIComponent uiCom= itr.next();

                                        System.out.println("Component class "+uiCom.getClass().getName());

                                        Column col =(Column)uiCom;

                                        col.setSortOrder(Ordering.UNSORTED);

                                        col.setFilterValue("");

                              }

                              table.restoreOrigValue();

                    }

          }

add the below line in Component.xml

<component class="com.model.seam.ExtendedSupport" name="extendedSupport" precedence="20" scope="APPLICATION"/>

now u can able to access this method in Xhtml