Sawan Vithlani <vithlani.lists <at> gmail.com> writes:
>
>
> Would be worth it if you posted your JSP and backing bean code along with
your
question....Sawan
>
> On 12/15/06, Sanjeev Gour <
> sanjeev.gour <at> gmail.com> wrote:Hi,I am using tomahwk tree2 in my example
but clicking on a leaf node
> is causing the following exception:java.lang.ClassCastException:
org.apache.myfaces.custom.tree2.TreeStateBase
org.apache.myfaces.custom.tree2.UITreeData.restoreState(UITreeData.java:111)
>
org.apache.myfaces.custom.tree2.HtmlTree.restoreState(HtmlTree.java:95)
javax.faces.component.UIComponentBase.processRestoreState(UIComponentBase.java:
1007)
javax.faces.component.UIComponentBase.processRestoreState
>
(UIComponentBase.java:1019)
javax.faces.component.UIComponentBase.processRestoreState(UIComponentBase.java:
1019)
com.sun.faces.application.StateManagerImpl.restoreComponentState(StateManager
Impl.java
>
:352)
com.sun.faces.application.StateManagerImpl.restoreView(StateManagerImpl.java:
240)
com.sun.faces.application.ViewHandlerImpl.restoreView(ViewHandlerImpl.java:
228)
com.sun.faces.lifecycle.RestoreViewPhase.execute
>
(RestoreViewPhase.java:157)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:90)
javax.faces.webapp.FacesServlet.service
>
(FacesServlet.java:197)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.
java:100)
org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.
java:147)
> I am unable to understand why this is coming. I have specified filter
mapping
inmy web.xml. Can somwbody please help?Thanks.Sanjeev.
>
>
>
>
Hi,
Thanks for your time. This is one example found on net with little
modifications. One point to note here is that I noticed that the
ExtensionListener is not configured correctly. Here is my web.xml code:
<?xml version="1.0"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";>
<display-name>Test</display-name>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet>
<servlet-name>SourceCodeServlet</servlet-name>
<servlet-class>org.apache.myfaces.shared_tomahawk.util.servlet.
SourceCodeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>SourceCodeServlet</servlet-name>
<url-pattern>*.source</url-pattern>
</servlet-mapping>
<!-- Faces Servlet -->
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<login-config>
<auth-method>BASIC</auth-method>
</login-config>
<context-param>
<description>This parameter tells MyFaces if javascript code should be
allowed in the rendered HTML output. If javascript is allowed, command_link
anchors will have javascript code that submits the corresponding form.
If javascript is not allowed, the state saving info and nested
parameters will be added as url parameters.
Default: "true"</description>
<param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<description>If true, rendered HTML code will be formatted, so that it is
"human readable".
i.e. additional line separators and whitespace will be written,
that
do not
influence the HTML code.
Default: "true"</description>
<param-name>org.apache.myfaces.PRETTY_HTML</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<description>If true, a javascript function will be rendered that is
able to restore the
former vertical scroll on every request. Convenient feature if you
have pages with long lists and you do not want the browser page to always jump
to the top if you trigger a link or button action that stays on the same page.
Default: "false"</description>
<param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<description>
Validate managed beans, navigation rules and ensure
that forms are not nested.
</description>
<param-name>org.apache.myfaces.VALIDATE</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<description>A class implementing the
org.apache.myfaces.shared.renderkit.html.util.AddResource
interface. It is responsible to
place scripts and css on the right position in your HTML
document.
Default:
"org.apache.myfaces.shared.renderkit.html.util.DefaultAddResource"
Follow the description on the MyFaces-Wiki-Performance page to
enable
StreamingAddResource instead of DefaultAddResource if you want to
gain performance.
</description>
<param-name>org.apache.myfaces.ADD_RESOURCE_CLASS</param-name>
<param-value>org.apache.myfaces.renderkit.html.util.DefaultAddResource
</param-value>
<!--param-value>org.apache.myfaces.component.html.util.StreamingAddResource
</param-value-->
</context-param>
<context-param>
<description>
A very common problem in configuring MyFaces-web-applications
is that the Extensions-Filter is not configured at all
or improperly configured. This parameter will check for a properly
configured Extensions-Filter if it is needed by the web-app.
In most cases this check will work just fine, there might be cases
where an internal forward will bypass the Extensions-Filter and the
check
will not work. If this is the case, you can disable the check by
setting
this parameter to false.
</description>
<param-name>org.apache.myfaces.CHECK_EXTENSIONS_FILTER</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<description>
Change the url-pattern from the ExtensionsFilter
Default is "/faces/myFacesExtensionResource"
Note: The filter-mapping for ExtensionsFilter, the url-pattern is
this value + "/*", else there comes a exception
</description>
<param-name>org.apache.myfaces.RESOURCE_VIRTUAL_PATH</param-name>
<param-value>/faces/extensionResource</param-value>
</context-param>
<filter>
<filter-name>MyFacesExtensionsFilter</filter-name>
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter
</filter-class>
<init-param>
<description>
Set the size limit for uploaded files.
Format: 10 - 10 bytes
10k - 10 KB
10m - 10 MB
1g - 1 GB
</description>
<param-name>maxFileSize</param-name>
<param-value>20m</param-value>
</init-param>
</filter>
<!-- extension mapping for adding <script/>, <link/>, and other resource
tags to
JSF-pages -->
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<!-- servlet-name must match the name of your
javax.faces.webapp.FacesServlet entry -->
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
<!-- extension mapping for serving page-independent resources (javascript,
stylesheets, images, etc.) -->
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<url-pattern>/faces/myFacesExtensionResource/*</url-pattern>
</filter-mapping>
<!-- extension mapping for adding <script/>, <link/>, and other resource tags
to
JSF-pages -->
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<url-pattern>*.faces</url-pattern>
</filter-mapping>
</web-app>
Following is the exception I am gettin at application launch;
log4j:WARN No appenders could be found for logger
(org.apache.catalina.startup.TldConfig).
log4j:WARN Please initialize the log4j system properly.
java.lang.ClassCastException:
org.apache.myfaces.renderkit.html.util.ExtensionsPhaseListener
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:711)
at com.sun.faces.config.ConfigureListener.configure(ConfigureListener.java:398)
at
com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.
java:328)
at
org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:
3692)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4127)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:680)
at org.apache.catalina.startup.Catalina.start(Catalina.java:536)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Dec 18, 2006 12:21:12 PM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerStart
This is my jsp code:
<%@ taglib uri="http://java.sun.com/jsf/html"; prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core"; prefix="f"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk"; prefix="t"%>
<html>
<[EMAIL PROTECTED] file="inc/head.inc" %>
<body>
<f:view>
<h:form id="foo">
<t:tree2 id="clientTree" value="#{treeBacker.treeData}"
var="node"
varNodeToggler="t" showRootNode="false">
<f:facet name="person">
<t:graphicImage value="images/yellow-folder-closed
.png"
rendered="false" border="0" id="d"/>
</f:facet>
<f:facet name="collapse">
<t:graphicImage value="images/yellow-folder-closed
.png"
rendered="true" border="0"/>
</f:facet>
<f:facet name="foo-folder">
<h:panelGroup>
<f:facet name="expand">
<t:graphicImage value="images/yellow-folder
-open.png"
rendered="true" border="0"/>
</f:facet>
<f:facet name="collapse">
<t:graphicImage value="images/yellow-folder
-closed.png"
rendered="false" border="0"/>
</f:facet>
<h:outputText value="#{node.description}"
styleClass="nodeFolder"/>
</h:panelGroup>
</f:facet>
<f:facet name="bar-folder">
<t:graphicImage value="images/blue-folder
-open.gif"
rendered="true" border="0" id="o"/>
</f:facet>
<f:facet name="document">
<h:panelGroup>
<t:graphicImage value="images/
document.png" border="0" id="v"/>
<h:commandLink value="click"
action="success"/>
</h:panelGroup>
<h:panelGroup>
<h:commandLink immediate="true"
action="success"
actionListener="#{navigationBacker.processAction}">
<t:graphicImage value="/images/document.
png" border="0" />
<h:outputText value="#{node.description}" />
<f:param name="docNum"
value="#{node.identifier}" />
</h:commandLink>
</h:panelGroup>
</f:facet>
</t:tree2>
</h:form>
</f:view>
</body>
</html>
and this is java bean:
package org.apache.myfaces.examples.tree;
import javax.faces.component.UIComponent;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.ActionEvent;
import org.apache.myfaces.custom.tree2.HtmlTree;
import org.apache.myfaces.custom.tree2.TreeNodeBase;
public class NavigationBacker {
/**
* Intercept when a lead node is expanded and load additional data.
* @param event
* @throws AbortProcessingException
*/
public void processAction(ActionEvent event) throws
AbortProcessingException {
System.out.println("Entering processAction()");
UIComponent component = (UIComponent) event.getSource();
while (!(component != null && component instanceof HtmlTree)) {
component = component.getParent();
}
if (component != null) {
HtmlTree tree = (HtmlTree) component;
TreeNodeBase node = (TreeNodeBase) tree.getNode();
if (!tree.isNodeExpanded() &&
node.getChildren().size() == 0) {
}
}
}
one more bean I have:
package org.apache.myfaces.examples.tree;
import org.apache.myfaces.custom.tree2.HtmlTree;
import org.apache.myfaces.custom.tree2.TreeNode;
import org.apache.myfaces.custom.tree2.TreeNodeBase;
import org.apache.myfaces.custom.tree2.TreeModel;
import org.apache.myfaces.custom.tree2.TreeModelBase;
import javax.faces.context.FacesContext;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.validator.ValidatorException;
import javax.faces.event.ActionEvent;
import java.io.Serializable;
/**
* Backer bean for use in example. Basically makes a TreeNode available.
*
* @author Sean Schofield
* @version $Revision: 472610 $ $Date: 2006-11-08 19:46:34 +0000 (Wed, 08 Nov
2006) $
*/
public class TreeBacker implements Serializable
{
/**
* serial id for serialisation versioning
*/
private static final long serialVersionUID = 1L;
private HtmlTree _tree;
private String activeNodeId;
public TreeNode getTreeData()
{
TreeNode treeData = new TreeNodeBase("foo-folder", "First", false);
// construct a set of fake data (normally your data would come from a
database)
// populate Frank's portion of the tree
TreeNodeBase personNode = new TreeNodeBase("foo-folder", "Accounting",
false);
TreeNodeBase income = new TreeNodeBase("foo-folder", "Income", false);
income.getChildren().add(new TreeNodeBase("document", "expense", true))
;
personNode.getChildren().add(income);
// personNode.getChildren().add(new TreeNodeBase("foo-folder", "Requires
Foo 1", false));
// TreeNodeBase folderNode = new TreeNodeBase("foo-folder", "Requires
Foo
Reviewer", false);
/*folderNode.getChildren().add(new TreeNodeBase("document", "X050001",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "X050002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "X050003",
true));
personNode.getChildren().add(folderNode);
personNode.getChildren().add(new TreeNodeBase("foo-folder", "Requires
Foo Recommendation", false));
folderNode = new TreeNodeBase("foo-folder", "Requires Foo Approval",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "J050001",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J050002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J050003",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "E050011",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "R050002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "C050003",
true));
personNode.getChildren().add(folderNode);
folderNode = new TreeNodeBase("bar-folder", "Requires Bar Processing",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "X050003",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "X050011",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "F050002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "G050003",
true));
personNode.getChildren().add(folderNode);
folderNode = new TreeNodeBase("bar-folder", "Requires Bar Approval",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "J050006",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J050007",
true));
personNode.getChildren().add(folderNode);
treeData.getChildren().add(personNode);
// populate Betty's portion of the tree
personNode = new TreeNodeBase("person", "Betty Bar", false);
personNode.getChildren().add(new TreeNodeBase("foo-folder", "Requires
Foo", false));
folderNode = new TreeNodeBase("foo-folder", "Requires Foo Reviewer",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "X012000",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "X013000",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "X014000",
true));
personNode.getChildren().add(folderNode);
folderNode = new TreeNodeBase("foo-folder", "Requires Foo
Recommendation", false);
folderNode.getChildren().add(new TreeNodeBase("document", "J010026",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J020002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J030103",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "E030214",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "R020444",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "C010000",
true));
personNode.getChildren().add(folderNode);
personNode.getChildren().add(new TreeNodeBase("foo-folder", "Requires
Foo Approval", false));
folderNode = new TreeNodeBase("bar-folder", "Requires Bar Processing",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "T052003",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "T020011",
true));
personNode.getChildren().add(folderNode);
folderNode = new TreeNodeBase("bar-folder", "Requires Bar Approval",
false);
folderNode.getChildren().add(new TreeNodeBase("document", "J010002",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "J030047",
true));
folderNode.getChildren().add(new TreeNodeBase("document", "F030112",
true));
personNode.getChildren().add(folderNode);
*/
treeData.getChildren().add(personNode);
return treeData;
}
/**
* NOTE: This is just to show an alternative way of supplying tree data.
You can supply either a
* TreeModel or TreeNode.
*
* @return TreeModel
*/
public TreeModel getExpandedTreeData()
{
return new TreeModelBase(getTreeData());
}
public void setTree(HtmlTree tree)
{
_tree = tree;
}
public HtmlTree getTree()
{
return _tree;
}
public String expandAll()
{
_tree.expandAll();
return null;
}
private String _nodePath;
public void setNodePath(String nodePath)
{
_nodePath = nodePath;
}
public String getNodePath()
{
return _nodePath;
}
public void checkPath(FacesContext context, UIComponent component,
java.lang.Object value)
{
// make sure path is valid (leaves cannot be expanded or renderer will
complain)
FacesMessage message = null;
String[] path = _tree.getPathInformation(value.toString());
for (int i = 0; i < path.length; i++)
{
String nodeId = path[i];
try
{
_tree.setNodeId(nodeId);
}
catch (Exception e)
{
throw new ValidatorException(message, e);
}
if (_tree.getNode().isLeaf())
{
message = new FacesMessage(FacesMessage.SEVERITY_ERROR,
"Invalid
node path (cannot expand a leaf): "
+ nodeId, "Invalid node path (cannot expand a leaf): "
+
nodeId);
throw new ValidatorException(message);
}
}
}
public void expandPath(ActionEvent event)
{
_tree.expandPath(_tree.getPathInformation(_nodePath));
}
}
Please help.
Thanks,
Sanjeev.
