UIX-XML BC4J - Unexpected errors using paths and DeltaTree on a particular UIX page
We are using a PageDescription to dynamically change a UIX tree using the DeltaTree technique described in the Dynamic Structure for For UIX Pages chapter of the UIX Developers Guide.
We search for a particular node using PathUtils.FindPathWithNodeID(RenderingContext context, UINode from, java.lang.String nodeID), but this fails when the page contains nested ViewObjectScopes.
The method throws a NullPointerException, and the render fails:
29/08/02 9.08 Valutazioni: java.lang.NullPointerException
oracle.cabo.ui.data.DataObjectList oracle.cabo.ui.collection.DataObjectListNodeList.getDataObjectList(oracle.cabo.ui.RenderingContext)
int oracle.cabo.ui.collection.DataObjectListNodeList.size(oracle.cabo.ui.RenderingContext)
int oracle.cabo.ui.BaseUINode.getIndexedChildCount(oracle.cabo.ui.RenderingContext)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
boolean oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.path.PathImpl, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
oracle.cabo.ui.path.Path oracle.cabo.ui.path.PathUtils._findPath(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.UINode, oracle.cabo.ui.path.PathUtils$Finder)
oracle.cabo.ui.path.Path oracle.cabo.ui.path.PathUtils.findPathWithNodeID(oracle.cabo.ui.RenderingContext, oracle.cabo.ui.UINode, java.lang.String)
oracle.cabo.ui.UINode com.websiteitalia.wsdk.uix.pageflow.PageFlowManager.getRootUINode()
oracle.cabo.ui.UINode oracle.cabo.servlet.ui.UINodePageDescriptionProxy.getRootUINode()
oracle.cabo.ui.UINode oracle.cabo.servlet.ui.UINodePageRenderer.getRootUINode(oracle.cabo.servlet.BajaContext, oracle.cabo.ui.RenderingContext, oracle.cabo.servlet.Page)
oracle.cabo.ui.UINode oracle.cabo.servlet.ui.HTMLUINodePageRenderer.getRootUINode(oracle.cabo.servlet.BajaContext, oracle.cabo.ui.RenderingContext, oracle.cabo.servlet.Page)
void oracle.cabo.servlet.ui.UINodePageRenderer.renderPage(oracle.cabo.servlet.BajaContext, oracle.cabo.servlet.Page)
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void javax.servlet.http.HttpServlet.service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
void javax.servlet.http.HttpServlet.service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
void com.evermind.server.http.ServletRequestDispatcher.invoke(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
void com.evermind.server.http.ServletRequestDispatcher.forwardInternal(javax.servlet.ServletRequest, javax.servlet.http.HttpServletResponse)
boolean com.evermind.server.http.HttpRequestHandler.processRequest(com.evermind.server.ApplicationServerThread, com.evermind.server.http.EvermindHttpServletRequest, com.evermind.server.http.EvermindHttpServletResponse, java.io.InputStream, java.io.OutputStream, boolean)
void com.evermind.server.http.HttpRequestHandler.run(java.lang.Thread)
void com.evermind.util.ThreadPoolThread.run()
We found the element of the UIX page that causes the problem:
<bc4j:viewObjectScope name="ElementsView" >
<contents>
<bc4j:rowScope name="NewElement" >
<contents>
<bc4j:region automatic="false" >
<bc4j:key>
<bc4j:rowKey name="keyElement"/>
</bc4j:key>
<contents>
<bc4j:attrScope name="FlgState">
<contents>
<messageChoice name="FlgState" prompt="State" >
<boundAttribute name="selectedValue">
<concat>
<bc4j:attrProperty name="value"/>
<fixed text=""/>
</concat>
</boundAttribute>
<contents>
<!-- This is the nested vo scope causing the error -->
<bc4j:viewObjectScope name="DecodeStateView" >
<contents data:childData="list@DecodeState">
<option data:value="StateCode"
data:text="StateDescription"/>
</contents>
</bc4j:viewObjectScope>
</contents>
</messageChoice>
</contents>
</bc4j:attrScope>
</contents>
</bc4j:region>
</contents>
</bc4j:rowScope>
</contents>
</bc4j:viewObjectScope>
This usage of nested view object scopes has been explained in reply of a previous post, How to databind the children of a UIX XML choice, and before ours attempts to modify the tree it worked fine. Removing the nested view object scope the page makes the page render correctly, but we need it to retrieve the description of its state.
We get the same behaviour (and a much similar stack trace, with the same oracle.cabo.ui.data.DataObjectList oracle.cabo.ui.collection.DataObjectListNodeList.getDataObjectList (oracle.cabo.ui.RenderingContext) throwing a NullPointerException) if we use NodeUtils.createPreorderDescendentAttributeEnumeration method instead of PathUtils.
It's a bug in the DataObjectListNodeList class that's up at the top of
the stack. It's been fixed for 9.0.3. The bit of XML that's triggering
it isn't the <viewObjectScope>s, but the "data:childData".
I believe you can workaround this bug by not passing a null RenderingContext to
findPathWithNodeID(). Now, you don't have a real RenderingContext, and we
don't especially need one - "null" is legit here, but I think if
you just pass "new oracle.cabo.ui.RootRenderingContext()" then you'll
get around this bug.
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How do I calculate age (in numbers)
... just switched to Numbers, used to Excel... I suspect it's got to do with Data Formats... Please help!
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How to export just a portion of video in PE9?
I just upgraded to PE9 (from PE2) and cannot find the same menu options that let me export just a portion of my video to a file or DVD. anyone know where these settings are? Looked in the PDF online, but no luck finding this info. thanks david
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Adding column to incident list report for indident details (original isue and resolver comments)
Hi, we have SCSM 2010 with default reports. One very common quarterly requirement is that list of incidents for an analyst which is shown does not have any details of the incident. i would like to get a column to display the following 2 data fields :
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Enterprise services and Web services
Hi Everyone I need documents about Invoking enterprise services from Netweaver PI and web services from Netweaver PI, I can find only NetWeaver CE, but not PI. So help, any links?? or pdfs?? or ideal would be some demo example of invoking a web