Null pointer exception in Search page with ADF

Hi,
I have an entity and view object for table1. I created one more viewobject for the same entity object. And the viewobject has the following query with a bind variable.
select * from table1 where table1.value = :bindVar
I added this view object into my application module. I dragged and dropped the 'ExecutewithParams' option into my jsp page. I was trying to run this page to atleast get the search field. But I am getting following exception.
javax.faces.el.EvaluationException: java.lang.NullPointerException at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:190) at com.sun.faces.el.ValueBindingImpl.getValue(ValueBindingImpl.java:143) at com.sun.faces.util.Util.evaluateVBExpression(Util.java:974) at com.sun.faces.taglib.jsf_core.ConvertNumberTag.evaluateExpressions(ConvertNumberTag.java:256) at com.sun.faces.taglib.jsf_core.ConvertNumberTag.createConverter(ConvertNumberTag.java:219) at javax.faces.webapp.ConverterTag.doStartTag(ConverterTag.java:130) at com.sun.faces.taglib.jsf_core.ConvertNumberTag.doStartTag(ConvertNumberTag.java:205) at resources.jsp._CRSCF001._jspService(_CRSCF001.java:149) [resources/jsp/CRSCF001.jsp]
I tried the same search page with a new workspace. But it worked well.
I am not able to figure out what went wrong with the application.
Could anyone please help me with this issue?
Thanks,
Priya.S

Hi,
drag it as a parameter form and it should work as you expect it.
Frank

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Edited by: duyhai707 on Jul 13, 2011 8:09 PM

A lot I don't understand in here... actually, I don't understand anything in your post:
When you call ShowDialog, what exactly are you trying to show? The code is the decompiled showtabheader method of the viewer. So, are you trying to override the viewer control and reportalbum? My guess is that the null reference is for the reportalbum's child object which is not the reportalbum object of the viewer. I don't understand why the code since its all handled internally to the viewer anyhow.
Perhaps searching the forum for code sample will help?
Also, see the [WPF Demo|http://www.sdn.sap.com/irj/scn/elearn?rid=/library/uuid/a09f7025-0629-2d10-d7ae-df006a51d1a8]
Other good WPF resources to consult:
http://www.redmondpie.com/incorporate-crystal-reports-in-a-c-wpf-application/
http://www.sdn.sap.com/irj/scn/elearn?rid=/library/uuid/a09f7025-0629-2d10-d7ae-df006a51d1a8
http://www.codeproject.com/Tips/74499/Crystal-Report-in-WPF.aspx
Re: Crystal Reports for Visual Studio 2010 - WPF Viewer for .Net 4.0
http://codegain.com/articles/crystalreports/howto/incorporate-crystal-reports-in-wpf-using-c-sharp.aspx
CRVS2010 Beta - WPF Viewer, how to hide the GroupTree control?
Re: CRVS2010 Beta - WPF Viewer, how to hide the GroupTree control?
Ludek
Follow us on Twitter http://twitter.com/SAPCRNetSup
Got Enhancement ideas? Try the [SAP Idea Place|https://ideas.sap.com/community/products_and_solutions/crystalreports]

Null pointer exception with Lists

Hi,
I have got a problem with java.util.List. It is giving Null pointer exception whenever I try to add after extracting from my XML file.I have written the code like this:
List year; //Global variable
List loaddatas; //Global variable
Element e1; //Global
loaddatas=root.getChild("Load").getChildren("LoadData");
int k=loaddatas.size();
for(int i=0;i<loaddatas.size();i++)
e1=(Element)loaddatas.get(i);
year.add(i,Integer.valueOf(e1.getChildText("Year"))); // I am getting exception here.....
root is root element in XML file.
I am able to display "Integer.valueOf(e1.getChildText("Year"))" correctly.
Anybody please tell me how to solve this.
Thanks,
Sai Ram

Looks like somebody forgot to learn to program before starting to write code....
List list = new ArrayList();

Help with Null Pointer Exception

Hi, I am working on a simple menu program. It compiles and works correctly except for one item. I am having a problem with Greying out a menu item...... Specifically, When I press the EDIT / OPTIONS / READONLY is supposed to Greyout the Save and SaveAs options. But, when I do that it displays a Null Pointer Exception error message in the command window.
Your advice would be much appreciated!
Now for the code
/ FileName Menutest.java
// Sample Menu
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class MenuTest extends JFrame {
   private Action saveAction;
     private Action saveAsAction;
     private JCheckBoxMenuItem readOnlyItem;
   // set up GUI
   public MenuTest()
      super( "Menu Test" );
//*   file menu and menu items
      // set up File menu and its menu items
      JMenu fileMenu = new JMenu( "File" );
      // set up New menu item
      JMenuItem newItem = fileMenu.add(new TestAction( "New" ));
      // set up Open menu item
      JMenuItem openItem = fileMenu.add(new TestAction( "Open" ));
          // add seperator bar
          fileMenu.addSeparator();
      // set up Save menu item
      JMenuItem saveItem = fileMenu.add(new TestAction( "Save" ));
      // set up Save As menu item
      JMenuItem saveAsItem = fileMenu.add(new TestAction( "Save As" ));
          // add seperator bar
          fileMenu.addSeparator();
          // set up Exit menu item
      JMenuItem exitItem = new JMenuItem( "Exit" );
      exitItem.setMnemonic( 'x' );
      fileMenu.add( exitItem );
      exitItem.addActionListener(
         new ActionListener() { // anonymous inner class
            // terminate application when user clicks exitItem
            public void actionPerformed( ActionEvent event )
               System.exit( 0 );
         } // end anonymous inner class
      ); // end call to addActionListener
//*   Edit menu and menu items
          // set up the Edit menu
          JMenu editMenu = new JMenu( "Edit" );
          //JMenuItem editMenu = new JMenu( "Edit" );
      // set up Cut menu item
      Action cutAction = new TestAction("Cut");
      cutAction.putValue(Action.SMALL_ICON, new ImageIcon("cut.gif"));
      // set up Copy menu item
      Action copyAction = new TestAction("Copy");
      copyAction.putValue(Action.SMALL_ICON, new ImageIcon("copy.gif") );
      // set up Paste menu item
      Action pasteAction = new TestAction("Paste");
      pasteAction.putValue(Action.SMALL_ICON, new ImageIcon("paste.gif") );
          editMenu.add(cutAction);
          editMenu.add(copyAction);
          editMenu.add(pasteAction);
      // add seperator bar
          editMenu.addSeparator();
          // set up Options menu, and it submenus and items
          JMenu optionsMenu = new JMenu("Options");
          readOnlyItem = new JCheckBoxMenuItem("Read-only");
          readOnlyItem.addActionListener(
               new ActionListener()
               { // anonymous inner class
                    public void actionPerformed( ActionEvent event)
                      saveAction.setEnabled(!readOnlyItem.isSelected());
                      saveAsAction.setEnabled(!readOnlyItem.isSelected());
            } // end anonymous inner class
          ); // end call to addActionListener
          optionsMenu.add(readOnlyItem);
          // add seperator bar
          optionsMenu.addSeparator();
          // Work on Radio Buttons
          ButtonGroup textGroup = new ButtonGroup();
          JRadioButtonMenuItem insertItem = new JRadioButtonMenuItem("Insert");
          insertItem.setSelected(true);
          JRadioButtonMenuItem overTypeItem = new JRadioButtonMenuItem("Overtype");
          textGroup.add(insertItem);
          textGroup.add(overTypeItem);
          optionsMenu.add(insertItem);
          optionsMenu.add(overTypeItem);
          editMenu.add(optionsMenu);
//*   Help menu and menu items
          // set up the Help menu
          JMenu helpMenu = new JMenu( "Help" );
          helpMenu.setMnemonic( 'H' );
      // set up index menu item
      JMenuItem indexItem = helpMenu.add(new TestAction( "Index" ));
      indexItem.setMnemonic( 'I' );
      helpMenu.add( indexItem );
          // set up About menu item
      JMenuItem aboutItem = new JMenuItem( "About" );
      aboutItem.setMnemonic( 'A' );
      helpMenu.add( aboutItem );
      aboutItem.addActionListener(
         new ActionListener() { // anonymous inner class
            // display message dialog when user selects Open
            public void actionPerformed( ActionEvent event )
               JOptionPane.showMessageDialog( MenuTest.this,
                  "This is MenuTest.java \nVersion 1.0 \nMarch 15, 2004",
                  "About", JOptionPane.PLAIN_MESSAGE );
         } // end anonymous inner class
      ); // end call to addActionListener
      // create menu bar and attach it to MenuTest window
      JMenuBar bar = new JMenuBar();
      setJMenuBar( bar );
      bar.add( fileMenu );
          bar.add( editMenu );
          bar.add( helpMenu );
      setSize( 500, 200 );
      setVisible( true );
   } // end constructor
   public static void main( String args[] )
      MenuTest application = new MenuTest();
      application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
   // inner class to handle action events from menu items
   private class ItemHandler implements ActionListener {
      // process color and font selections
      public void actionPerformed( ActionEvent event )
       repaint();
      } // end method actionPerformed
   } // end class ItemHandler
   // Prints to action name to System.out
class TestAction extends AbstractAction
          public TestAction(String name) { super(name); }
      public void actionPerformed( ActionEvent event )
         System.out.println(getValue(Action.NAME) + " selected." );
   } // end class TestAction
} // end class MenuTest

alan, I've been trying to figure out a solution.
You can initialize it like this
private Action saveAction= new Action();
     private Action saveAsAction=new Action();
THE ABOVE WILL NOT WORK.
because Action is an interface. An interface does not have constructors. However, interface references are used for polymorphic purposes.
Anyway, all you have to do is find some class that implemets Action interface.... I cant seem to find one. Or maybe this is not how its supposed to be done?
Hopefully, someone can shed some light on this issue.
FYI,
http://java.sun.com/products/jfc/swingdoc-api-1.1/javax/swing/Action.html

Null Pointer Exception with Oracle Transformer

Hi all,
I'm getting a NullPointerException after building a DOM tree and feeding it to a stream via the Oracle JAXP transformer. I am trying to convert the data in DOMSource to PDF file. The following code:
TransformerFactory transFact = TransformerFactory.newInstance();
Transformer transForm = transFact.newTransformer();
ByteArrayOutputStream pdfOutStream = new ByteArrayOutputStream();
DOMSource pdfInput = new DOMSource(doc);
StreamResult pdfOutput = new StreamResult(pdfOutStream);
transForm.transform(pdfInput,pdfOutput);
int pdfByteSize = pdfOutStream.size();
System.out.println("Size of pdfByteSize : "+ pdfByteSize);
pdfByte = new byte[pdfByteSize];
pdfByte = pdfOutStream.toByteArray();
InputStream formInputStream = new ByteArrayInputStream(pdfByte);
Iam getting error at "transForm.transform(pdfInput,pdfOutput);".
Here the StackTrace :
07/05/24 10:59:40 XML-22900: (Fatal Error) An internal error condition occurred.
javax.xml.transform.TransformerException: XML-22900: (Fatal Error) An internal error condition occurred.
     at oracle.xml.jaxp.JXTransformer.reportException(JXTransformer.java:775)
     at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:374)
Caused by: java.lang.NullPointerException
     at oracle.xml.parser.v2.XMLText.reportSAXEvents(XMLText.java:402)
     at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
     at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:3061)
     at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
     at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:3061)
     at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
     at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:2165)
     at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:337)
Environment we are using is Sun JDK 1.4.2_06 on Windows, running JDeveloper 10 g with OC4j as Application Server.
Can any one please explain me in this regard?
Thanks
Manoj

Thanks for the Reply.
Before Null Pointer Exception I am getting another Fatal error:
javax.xml.transform.TransformerException: XML-22900: (Fatal Error) An internal error condition occurred.
     at oracle.xml.jaxp.JXTransformer.reportException(JXTransformer.java:775)
     at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:374)
Please Help

Null pointer Exception with Custom EventQueue

I created a simple class customEventQueue which is extended from EventQueue class and pushed it using
Toolkit.getDefaultToolkit().getSystemEventQueue().push(customEventQueue);
Now, whenever there are three modal dialogs on top of a frame and if I click on top dialog that closes all three dialog boxes, I get nullpointer exception in console. The custom event class does not have any method in it. It just extends from EventQueue.
I checked it in different JRE and it happens only in JRE1.3.1.
Has anybody tried the same thing with custom event queue? Any help is most welcome. Thanks...
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)

Hi Chandel me having the same problem
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown
Source)
at
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Sour
ce)
at
java.awt.DefaultKeyboardFocusManager.pumpApprovedKeyEvents(Unknown So
urce)
at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Sour
ce)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown
Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.SequencedEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown
Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown
Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Th bigger problem is that i don't know what is causing this exception, cause the stack trace doesn't mention the line of code where the exception occurred.
In earlier version of java we had pData null pointer exception. This bug manifests when the pull down menu doesn't fit completely into the frame's bounds and swing has to create a seaprate window for the pull-down.
The problem is that WInputMethod caches a reference to peer and that that reference becomes stale when peer is destroyed and recreated.
In this bug cached peer reference becomes stale as the Window for the menu is hidden (and its peer is destroyed) and shown again (with new peer this time).
WInputMethod have a cached reference to the old peer but that old peer is not connected to the underlying native window used to display the menu.
But it's been fixed. I want to know if our problem is in some way related to this pData bug.
Thanx.

Null Pointer Exception with iterator

Hi,
I'm trying to use an iterator on a collection bound to a jsf page fragment through datacontrol (data is retrieved from a web service).
Everything works fine except when this collection is null; I'm then getting a null pointer exception.
Is there an equivalent of <af:table emptytext="">? Or maybe, is there somewhere where I can configure my datacontrol to always return an empty collection instead of null?
Thanks.
Edit: my mistake; I made an error in the binding, which was pointing to another iterator already used.
Edited by: 965573 on 16 oct. 2012 02:17

Hi,
You can try not to render the table when the length of the Collection is zero. This can be done by a JSTL function "length" available at:
http://java.sun.com/jsp/jstl/functions
Ex:#{fn:length(bindings.Collection)>0}"
Thanks,

Null pointer exception in Search page with ADF

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