Bug 94916

This is with latest build as of today.
I am getting following exception when adding a web application to composite
application.

java.lang.NullPointerException
	at
org.netbeans.modules.compapp.projects.jbi.ui.customizer.VisualClassPathItem.equals(VisualClassPathItem.java:345)
	at java.util.ArrayList.indexOf(ArrayList.java:220)
	at
org.netbeans.modules.compapp.projects.jbi.ui.customizer.JbiProjectProperties$PathParser.encode(JbiProjectProperties.java:1647)
	at
org.netbeans.modules.compapp.projects.jbi.ui.customizer.JbiProjectProperties$PropertyInfo.encode(JbiProjectProperties.java:1229)
	at
org.netbeans.modules.compapp.projects.jbi.ui.customizer.JbiProjectProperties$1.run(JbiProjectProperties.java:782)
	at org.openide.util.Mutex.writeAccess(Mutex.java:356)
	at
org.netbeans.modules.compapp.projects.jbi.ui.customizer.JbiProjectProperties.store(JbiProjectProperties.java:772)
	at
org.netbeans.modules.compapp.projects.jbi.ui.actions.AddProjectAction.addProject(AddProjectAction.java:204)
	at
org.netbeans.modules.compapp.projects.jbi.ui.actions.AddProjectAction.perform(AddProjectAction.java:150)
	at
org.netbeans.modules.project.ui.actions.ProjectAction.actionPerformed(ProjectAction.java:99)
	at
org.netbeans.modules.project.ui.actions.LookupSensitiveAction.actionPerformed(LookupSensitiveAction.java:139)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
	at
javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
	at java.awt.Component.processMouseEvent(Component.java:5488)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
	at java.awt.Component.processEvent(Component.java:5253)
	at java.awt.Container.processEvent(Container.java:1966)
	at java.awt.Component.dispatchEventImpl(Component.java:3955)
	at java.awt.Container.dispatchEventImpl(Container.java:2024)
	at java.awt.Component.dispatchEvent(Component.java:3803)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
	at java.awt.Container.dispatchEventImpl(Container.java:2010)
	at java.awt.Window.dispatchEventImpl(Window.java:1778)
	at java.awt.Component.dispatchEvent(Component.java:3803)
[catch] at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
	at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

Steps to reproduce:

(1)create a composite app project
(2)create a web project
(3) add web project to composite app project by right click "add jbi module"
action of composite app project node.
(4)Go to composite app project properties and remove reference to this web app.
hit ok to close properties dialog.
(5) Now try to add web project again, you will get above exception.

After this I can not add web project again.