How to use Multiview Top Component

Hi all,

I need multiple tabs on editor pane.I am trying it using






































*        MultiViewDescription[] descriptionArray = new
MultiViewDescription[1];        descriptionArray[0] = new
MultiViewDescription() {            @Override            public int
getPersistenceType() {                return 0;            }
@Override            public String getDisplayName() {                return
"Test 1";            }            @Override            public Image
getIcon() {                return null;            }
@Override            public HelpCtx getHelpCtx() {                return
null;            }            @Override            public String
preferredID() {                return "A";            }
@Override            public MultiViewElement createElement()
{                return new
MultiViewEditorElement(Lookup.EMPTY);            }        };
TopComponent ctc = MultiViewFactory.createMultiView(descriptionArray,
descriptionArray[0]);        ctc.open();        ctc.requestActive();*

But runtime error occurred saying

*java.lang.**IllegalArgumentException: We expect CloneableEditorSupport in
org.openide.util.Lookup$Empty@*
*cce1139     at org.netbeans.core.spi.**multiview.text.*
*MultiViewEditorElement.<init>(**MultiViewEditorElement.java:*
*97)     at org.apache.syncope.netbeans.**plugin.view.*
*ResourceExplorerTopComponent$**7.createElement(*
*ResourceExplorerTopComponent.*
*java:508)     at org.netbeans.core.multiview.**MultiViewModel.*
*getElementForDescription(*
*MultiViewModel.java:222)     at org.netbeans.core.multiview.*
*MultiViewModel.**getActiveElement(*
*MultiViewModel.java:132)     at org.netbeans.core.multiview.*
*MultiViewModel.**getActiveElement(*
*MultiViewModel.java:128)     at org.netbeans.core.multiview.*
*MultiViewPeer.assignLookup(*
*MultiViewPeer.java:261)     at org.netbeans.core.multiview.*
*MultiViewTopComponent.**getLookup(**MultiViewTopComponent.java:*
*117)     at org.netbeans.modules.**localhistory.LocalHistory$*
*OpenedFilesListener.**handleTCFiles(LocalHistory.*
*java:535)     at org.netbeans.modules.**localhistory.LocalHistory$*
*OpenedFilesListener.**propertyChange(LocalHistory.*
*java:464)     at java.beans.**PropertyChangeSupport.fire(*
*PropertyChangeSupport.java:*
*335)     at java.beans.**PropertyChangeSupport.**firePropertyChange(*
*PropertyChangeSupport.java:*
*327)     at java.beans.**PropertyChangeSupport.**firePropertyChange(*
*PropertyChangeSupport.java:*
*263)     at org.netbeans.core.windows.**RegistryImpl.*
*doFirePropertyChange(*
*RegistryImpl.java:329)     at org.netbeans.core.windows.**RegistryImpl.*
*topComponentOpened(*
*RegistryImpl.java:187)     at org.netbeans.core.windows.*
*WindowManagerImpl.**notifyRegistryTopComponentOpen*
*ed(WindowManagerImpl.java:*
*1183)     at org.netbeans.core.windows.**WindowManagerImpl.*
*notifyTopComponentOpened(*
*WindowManagerImpl.java:1151)     at org.netbeans.core.windows.**Central.*
*addModeOpenedTopComponent(*
*Central.java:798)     at org.netbeans.core.windows.**ModeImpl.*
*addOpenedTopComponent(*
*ModeImpl.java:354)     at org.netbeans.core.windows.**WindowManagerImpl.*
*topComponentOpenAtTabPosition(*
*WindowManagerImpl.java:1261)     at org.netbeans.core.windows.*
*WindowManagerImpl.**topComponentOpen(*
*WindowManagerImpl.java:1226)     at org.openide.windows.*
*TopComponent.open(*
*TopComponent.java:497)     at org.openide.windows.**TopComponent.open(*
*TopComponent.java:477)     at org.apache.syncope.netbeans.**plugin.view.*
*ResourceExplorerTopComponent.**openMailEditor(*
*ResourceExplorerTopComponent.*
*java:580)     at org.apache.syncope.netbeans.**plugin.view.*
*ResourceExplorerTopComponent.**resourceExplorerTreeMouseClick**ed(*
*ResourceExplorerTopComponent.*
*java:170)     at org.apache.syncope.netbeans.**plugin.view.*
*ResourceExplorerTopComponent.**access$000(**ResourceExplorerTopComponent.*
*java:98)     at org.apache.syncope.netbeans.**plugin.view.*
*ResourceExplorerTopComponent$**1.mouseClicked(*
*ResourceExplorerTopComponent.*
*java:143)     at java.awt.AWTEventMulticaster.**mouseClicked(*
*AWTEventMulticaster.java:270)     at java.awt.Component.*
*processMouseEvent(Component.*
*java:6528)     at javax.swing.JComponent.**processMouseEvent(JComponent.*
*java:3321)     at java.awt.Component.**processEvent(Component.java:*
*6290)     at java.awt.Container.**processEvent(Container.java:*
*2234)     at java.awt.Component.**dispatchEventImpl(Component.*
*java:4881)     at java.awt.Container.**dispatchEventImpl(Container.*
*java:2292)     at java.awt.Component.**dispatchEvent(Component.java:*
*4703)     at java.awt.**LightweightDispatcher.*
*retargetMouseEvent(Container.*
*java:4898)     at java.awt.**LightweightDispatcher.*
*processMouseEvent(Container.*
*java:4542)     at java.awt.**LightweightDispatcher.*
*dispatchEvent(Container.java:*
*4462)     at java.awt.Container.**dispatchEventImpl(Container.*
*java:2278)     at java.awt.Window.**dispatchEventImpl(Window.java:*
*2739)     at java.awt.Component.**dispatchEvent(Component.java:*
*4703)     at java.awt.EventQueue.**dispatchEventImpl(EventQueue.*
*java:746)     at java.awt.EventQueue.access$*
*400(EventQueue.java:97)     at java.awt.EventQueue$3.run(*
*EventQueue.java:697)     at java.awt.EventQueue$3.run(*
*EventQueue.java:691)     at java.security.**AccessController.doPrivileged(*
*Native Method)     at java.security.**ProtectionDomain$1.*
*doIntersectionPrivilege(*
*ProtectionDomain.java:75)     at java.security.**ProtectionDomain$1.*
*doIntersectionPrivilege(*
*ProtectionDomain.java:86)     at java.awt.EventQueue$4.run(*
*EventQueue.java:719)     at java.awt.EventQueue$4.run(*
*EventQueue.java:717)     at java.security.**AccessController.doPrivileged(*
*Native Method)     at java.security.**ProtectionDomain$1.*
*doIntersectionPrivilege(*
*ProtectionDomain.java:75)     at java.awt.EventQueue.*
*dispatchEvent(EventQueue.java:*
*716)     at org.netbeans.core.**TimableEventQueue.**dispatchEvent(*
*TimableEventQueue.java:159) [catch] at java.awt.EventDispatchThread.*
*pumpOneEventForFilters(*
*EventDispatchThread.java:201)     at java.awt.EventDispatchThread.*
*pumpEventsForFilter(*
*EventDispatchThread.java:116)     at java.awt.EventDispatchThread.*
*pumpEventsForHierarchy(*
*EventDispatchThread.java:105)     at java.awt.EventDispatchThread.*
*pumpEvents(*
*EventDispatchThread.java:101)     at java.awt.EventDispatchThread.*
*pumpEvents(*
*EventDispatchThread.java:93)     at java.awt.EventDispatchThread.*
*run(EventDispatchThread.java:*
*82) *

Error occurred due to







*         @Override            public MultiViewElement createElement()
{                return new
MultiViewEditorElement(Lookup.EMPTY);            }*
How I solve this issue. Please help me.

Regards.
-- 
Nuwan Sameera.
Undergraduate,
Electronic and Telecommunication Engineering,
University of Moratuwa.