Bug 191637 Empty cube causes error
Comment removed as requested by the submitter - 2007-06-08 droy
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/data/util/DiskIndex.java
this.name = name;
		this.documentManager = documentManager;
		loadFromDisk( );
	}
	/**
	 * 
	 * @return
	 */
	public String getName( )
	{
		return name;
	}
	/**
	 * 
	 * @throws IOException
	 * @throws DataException 
	 */
	private void loadFromDisk( ) throws IOException, DataException
	{
		openReadDocumentObject( );
		
		keyDataType =  new int[documentObject.readInt( )];
		for ( int i = 0; i < keyDataType.length; i++ )
		{
			keyDataType[i] = documentObject.readInt( );
		}
		keyCount = documentObject.readInt( );
		degree = documentObject.readInt( );
		rootNodeOffset = documentObject.readInt( );
		numberOfLevel = documentObject.readShort( );