Bug 201526 Mutil parameter value will show the mutil value[0705]
Description: Mutil parameter value will show the mutil value[0705] Step: 1. New a list parameter and select allow multiple value 2. Add some value in it. 3. Drop the parameter in layout( param["NewParameter1"] ). 4. Preview and select several value. Actual result: It will preview a object string. Expected result: The value that is selected will be previewed.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/presentation/LocalizedContentVisitor.java
if ( IForeignContent.EXTERNAL_TYPE.equals( rawFormat ) )
		{
			return processExtendedContent( foreignContent );
		}
		
		if ( IForeignContent.IMAGE_TYPE.equals( rawFormat ) )
		{
			if ( rawValue instanceof IImageContent )
			{
				IImageContent image = (IImageContent) rawValue;
				processImage( image );
				return image;
			}
			if ( rawValue instanceof byte[] )
			{
				IImageContent imageContent = reportContent
						.createImageContent( foreignContent );
				imageContent.setImageSource( IImageContent.IMAGE_EXPRESSION );
				imageContent.setData( (byte[]) rawValue );
				processImage( imageContent );
				return imageContent;
			}
		}
		
		if ( IForeignContent.TEXT_TYPE.equals( rawFormat ) )
		{
			handleOnRender( foreignContent );
			ITextContent textContent = reportContent
					.createDataContent( foreignContent );