Bug 315315 Warning messages seen while starting up workbench
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/impl/SerializerImpl.java
Map<String, Object> options = new HashMap<String, Object>( );
		options.put( XMLResource.OPTION_ENCODING, "UTF-8" ); 
		
		rChart.save( os, options );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.birt.chart.model.ISerialization#read(java.io.InputStream)
	 */
	public Chart read( InputStream is ) throws IOException
	{
		
		ResourceSet rsChart = new ResourceSetImpl( );
		rsChart.getResourceFactoryRegistry( )
				.getExtensionToFactoryMap( )
				.put( "chart", new ModelResourceFactoryImpl( ) ); 
		
		
		Resource rChart = rsChart.createResource( URI.createFileURI( "test.chart" ) ); 
		Map<String, Object> options = new HashMap<String, Object>( );
		options.put( XMLResource.OPTION_ENCODING, "UTF-8" ); 
		rChart.load( is, options );
		return (Chart) rChart.getContents( ).get( 0 );
	}
	private StringBuffer getChartStringFromStream( InputStream is )
	{
		StringBuffer sbChart = new StringBuffer( "" ); 
		BufferedReader reader = null;