Bug 167545 Copy a cascading parameter group and paste it to another parameter group causes an exception thrown
Steps to reproduce: 1.Copy a cascading parameter group using short cut key "Ctrl+x"/"Ctrl+c", or choosing context menu "Cut"/"Copy"; 2.Paste it to another parameter group using short cut key "Ctrl+v", or choosing context menu "Paste"; Expected result: The source one is pasted in the destination. Actual result: An exception thrown org.eclipse.birt.report.model.api.command.ContentException: The Cascading Parameter Group("Source") is not allowed in the slot (parameters) of Parameter Group("Destination").
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
*/
	public static RGB getRGBValue( String val )
	{
		if ( val != null )
		{
			if ( val.startsWith( "#" ) ) 
			{
				int rgb = ColorUtil.parseColor( val );
				if ( rgb != -1 )
				{
					return getRGBValue( rgb );
				}
			}
			else
			{
				String[] ss = val.split( "," ); 
				if ( ss.length == 3 )
				{
					try
					{
						int r = Integer.parseInt( ss[0] );
						int g = Integer.parseInt( ss[1] );
						int b = Integer.parseInt( ss[2] );
						return new RGB( r, g, b );
					}
					catch ( NumberFormatException e )
					{
						return null;
					}
				}