Bug 198594 XLS Emitter: Decimal value exported as String instead of Number
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelWriter.java
.getProperty( StyleConstant.BORDER_TOP_WIDTH_PROP );
		writeBorder( "Top", topLineStyle, topWeight, topColor );
		String leftColor = style
				.getProperty( StyleConstant.BORDER_LEFT_COLOR_PROP );
		String leftLineStyle = style
				.getProperty( StyleConstant.BORDER_LEFT_STYLE_PROP );
		String leftWeight = style
				.getProperty( StyleConstant.BORDER_LEFT_WIDTH_PROP );
		writeBorder( "Left", leftLineStyle, leftWeight, leftColor );
		String rightColor = style
				.getProperty( StyleConstant.BORDER_RIGHT_COLOR_PROP );
		String rightLineStyle = style
				.getProperty( StyleConstant.BORDER_RIGHT_STYLE_PROP );
		String rightWeight = style
				.getProperty( StyleConstant.BORDER_RIGHT_WIDTH_PROP );
		writeBorder( "Right", rightLineStyle, rightWeight, rightColor );
		writer.closeTag( "Borders" );
		String fontName = style.getProperty( StyleConstant.FONT_FAMILY_PROP );
		String size = style.getProperty( StyleConstant.FONT_SIZE_PROP );
		String fontStyle = style.getProperty( StyleConstant.FONT_STYLE_PROP );
		String fontWeight = style.getProperty( StyleConstant.FONT_WEIGHT_PROP );
		String strikeThrough = style
				.getProperty( StyleConstant.TEXT_LINE_THROUGH_PROP );
		String underline = style
				.getProperty( StyleConstant.TEXT_UNDERLINE_PROP );
		String color = style.getProperty( StyleConstant.COLOR_PROP );
		writeFont( fontName, size, fontWeight, fontStyle, strikeThrough,
				underline, color );
		String bgColor = style
				.getProperty( StyleConstant.BACKGROUND_COLOR_PROP );