Bug 123233 [build path] link source wizard creates invalid folder
20060110 - Open build paty > link source - enter a source folder name but leave the location empty - folder is created - Open the properties on the new folder -> NPE java.lang.NullPointerException at org.eclipse.core.internal.filesystem.InternalFileSystemCore.getFileSystem(InternalFileSystemCore.java:62) at org.eclipse.core.filesystem.EFS.getFileSystem(EFS.java:248) at org.eclipse.ui.internal.ide.dialogs.ResourceInfoPage.createStateGroup(ResourceInfoPage.java:428) at org.eclipse.ui.internal.ide.dialogs.ResourceInfoPage.createContents(ResourceInfoPage.java:251) at org.eclipse.jface.preference.PreferencePage.createControl(PreferencePage.java:232) at org.eclipse.jface.preference.PreferenceDialog.createPageControl(PreferenceDialog.java:1371) at org.eclipse.jface.preference.PreferenceDialog$12.run(PreferenceDialog.java:1138) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:785) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148) at org.eclipse.jface.preference.PreferenceDialog.showPage(PreferenceDialog.java:1132) at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.showPage(FilteredPreferenceDialog.java:350) at org.eclipse.jface.preference.PreferenceDialog$8.selectionChanged(PreferenceDialog.java:638) at org.eclipse.jface.viewers.StructuredViewer$3.run(StructuredViewer.java:802) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37) at org.eclipse.core.runtime.Platform.run(Platform.java:785) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148) at org.eclipse.jface.viewers.StructuredViewer.firePostSelectionChanged(StructuredViewer.java:800) at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1511) at org.eclipse.jface.preference.PreferenceDialog.selectSavedItem(PreferenceDialog.java:925) at org.eclipse.ui.internal.dialogs.FilteredPreferenceDialog.selectSavedItem(FilteredPreferenceDialog.java:393)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/AddSourceFolderWizardPage.java
restoreCPElements();
		
		int projectEntryIndex= -1;
		
		for (int i= 0; i < fExistingEntries.size(); i++) {
			IClasspathEntry curr= ((CPListElement)fExistingEntries.get(i)).getClasspathEntry();
			if (curr.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
				if (path.equals(curr.getPath()) && fExistingEntries.get(i) != fNewElement) {
					result.setError(NewWizardMessages.NewSourceFolderWizardPage_error_AlreadyExisting); 
					return result;
				}
				if (projPath.equals(curr.getPath())) {
					projectEntryIndex= i;
				}
			}
		}
		
		boolean isProjectAsSourceFolder= false;
		
		fModifiedElements.clear();
		updateFilters(fNewElement.getPath(), path);
		
		fNewElement.setPath(path);
		if (fLinkedMode) {
			fNewElement.setLinkTarget(fLinkFields.getLinkTarget());
		}
		fRemovedElements.clear();
		Set modified= new HashSet();				
		if (fExcludeInOthersFields.isEnabled() && fExcludeInOthersFields.isSelected()) {
			addExclusionPatterns(fNewElement, fExistingEntries, modified);