Bug 112287 It's better to transfer to "new data source" dialog when creating a new data set without existing data source.
Description: It's better to transfer to "new data source" dialog automatically when creating a new data set without existing data source. Steps to reproduce: 1. There is no existing data source. 2. Create a new data set. 3. It pops up hint message, saying that "there is no data source". Actual result: it's better to transfer to "new data source" dialog box now and help users create a new data source.
chart/org.eclipse.birt.chart.reportitem.ui/src/org/eclipse/birt/chart/reportitem/ui/ReportDataServiceProvider.java
{
			throw new ChartException( ChartReportItemUIActivator.ID,
					ChartException.DATA_BINDING,
					e );
		}
		finally
		{
			
			Thread.currentThread( ).setContextClassLoader( oldContextLoader );
		}
		return dataList;
	}
	public String getBoundDataSet( )
	{
		if ( itemHandle.getDataSet( ) == null )
		{
			return null;
		}
		return itemHandle.getDataSet( ).getQualifiedName( );
	}
	public String getReportDataSet( )
	{
		List list = DEUtil.getDataSetList( itemHandle.getContainer( ) );
		if ( list.size( ) > 0 )
		{
			return ( (DataSetHandle) list.get( 0 ) ).getQualifiedName( );
		}
		return null;
	}
	public void setContext( Object context )