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
IOUtil.readObject( this.rowExprsDis ) );
				}
			}
			
			this.metaOffset = IOUtil.INT_LENGTH
					+ IOUtil.readInt( this.rowExprsDis ) + IOUtil.INT_LENGTH;
			
		}
		catch ( IOException e )
		{
			throw new DataException( ResourceConstants.RD_LOAD_ERROR,
					e,
					"Result Data" );
		}
		
		this.rowExprsIs = rowExprsIs;
		this.rowLenIs = rowLenIs;
		
		this.currRowIndex = -1;
		this.lastRowIndex = -1;
		this.currRowLenReadIndex = 0;
		this.rowCount = rowCount;
		this.rowIDMap = new BasicCachedArray( rowCount );
	}
	
	/*
	 * @see org.eclipse.birt.data.engine.impl.document.IExprResultReader#getRowCount()
	 */
	public int getCount( )
	{