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
names[i] = handles[i].getName( );
		}
		return names;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.ui.swt.interfaces.IDataServiceProvider#getAllStyleDisplayNames()
	 */
	public String[] getAllStyleDisplayNames( )
	{
		StyleHandle[] handles = getAllStyleHandles( );
		String[] names = new String[handles.length];
		for ( int i = 0; i < names.length; i++ )
		{
			names[i] = handles[i].getDisplayLabel( );
		}
		return names;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.chart.ui.interfaces.IDataServiceProvider#getCurrentStyle()
	 */
	public String getCurrentStyle( )
	{
		if ( itemHandle.getStyle( ) == null )
		{
			return null;
		}