Bug 166307 Thai font in csv/excel export
I run birt-viewer 2.1.1 and export data to csv format, birt can generate correct but in field of thai font birt display font that cannot understand. I need to fix this ploblem quickly to close my project, please anyone help me. Thanks you very much for your solution. Sudhlo
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
* @throws BirtException
	 */
	public void clearCache( DataSetHandle dataSet ) throws BirtException
	{
		DataSessionContext context = new DataSessionContext( DataSessionContext.MODE_DIRECT_PRESENTATION,
				dataSet.getModuleHandle( ),
				null );
		DataRequestSession requestSession = DataRequestSession.newSession( context );
		IModelAdapter modelAdaptor = requestSession.getModelAdaptor( );
		DataSourceHandle dataSource = dataSet.getDataSource( );
		IBaseDataSourceDesign sourceDesign = modelAdaptor.adaptDataSource( dataSource );
		IBaseDataSetDesign dataSetDesign = modelAdaptor.adaptDataSet( dataSet );
		requestSession.clearCache( sourceDesign, dataSetDesign );
	}
	/**
	 * @param maxRows
	 */
	public void setMaxRows( int maxRows )
	{
		if ( config != null )
		{
			config.setMaxRowsPerQuery( maxRows );
		}
	}
	/**
	 * Collects all the distinct values for the given element and
	 * bindColumnName. This method will traverse the design tree for the given
	 * element and get the nearest binding column holder of it. The nearest
	 * binding column holder must be a list or table item, and it defines a
	 * distinct data set and bingding columns in it. If the element is null,