Bug 204229 [Automation][Regression]Exception is thrown when preview reportdesign in webviewer
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/util/ExprDataReader2.java
{
	private int version;
	private RAInputStream rowExprsIs;
	private RAInputStream rowLenIs;
	
	private DataInputStream rowExprsDis;
	private DataInputStream rowLenDis;
	protected int rowCount;
	
	private int lastRowIndex;
	private int currRowIndex;
	
	private int currRowLenReadIndex;
	
	private RowIndexUtil rowIndexUtil;
	
	private int nextDestIndex; 
	
	private Map exprValueMap;	
	private BasicCachedArray rowIDMap;
	private List exprKeys;
	private int metaOffset;
	private Map dataSetExprKeys;
	private DataSetResultSet dataSetResultSet;
	
	/**
	 * @param rowExprsIs
	 * @param rowLenIs
	 * @throws DataException 
	 */