Bug 156166 Error occour when previewing attached report in web viewer.
Decription:Error occour when previewing attached report in web viewer. Steps to reproduce: 1.run attached reports in web viewer. Expeceted results: preview properly Actual results: Error occour when previewing the reports in web viewer while it works properly in html and PDF
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/util/ExprDataReader1.java
private RAInputStream rowLenRAIs;
	
	private int rowCount;
	
	private int version;
	private Map exprValueMap;
	private List exprKeys;
	private int metaOffset;
	/**
	 * @param rowExprsRAIs
	 * @param rowLenRAIs
	 * @param version
	 */
	ExprDataReader1( RAInputStream rowExprsRAIs, RAInputStream rowLenRAIs,
			int version ) throws DataException
	{
		this.INT_LENGTH = IOUtil.INT_LENGTH;
		
		try
		{
			this.rowCount = IOUtil.readInt( rowExprsRAIs );
			int exprCount = IOUtil.readInt( rowExprsRAIs );
			this.exprKeys = new ArrayList();
			this.rowExprsDis = new DataInputStream( rowExprsRAIs );
			for( int i = 0; i < exprCount; i++ )
			{
				this.exprKeys.add( IOUtil.readString( this.rowExprsDis ) );
			}
			this.metaOffset = INT_LENGTH + IOUtil.readInt( this.rowExprsDis ) + INT_LENGTH;