Bug 104986 Backgound image uses an absolute path
Currently Chart uses an absolute path to indicate a backgournd image, that may cause the design unusable on other environments. Expected the background image can be definded in multiple ways like in report designer. e.g. URI(absolute path), File(relative path), Embedded Image(Encoded Image Data).
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/model/attribute/util/AttributeAdapterFactory.java
{
			return createScriptValueAdapter( );
		}
		public Object caseSeriesValue( SeriesValue object )
		{
			return createSeriesValueAdapter( );
		}
		public Object caseSize( Size object )
		{
			return createSizeAdapter( );
		}
		public Object caseStyle( Style object )
		{
			return createStyleAdapter( );
		}
		public Object caseStyleMap( StyleMap object )
		{
			return createStyleMapAdapter( );
		}
		public Object caseText( Text object )
		{
			return createTextAdapter( );
		}
		public Object caseTextAlignment( TextAlignment object )
		{
			return createTextAlignmentAdapter( );
		}
		public Object caseTooltipValue( TooltipValue object )
		{
			return createTooltipValueAdapter( );