Bug 135497 Data Type is not correct when "Generate All" for Data item
Description: Create a sample datasource and dataset. Insert a data into layout, bind with the dataset.Click "Generate All" to get the Data Binding columns, but the displayed data type is not consistent with the actual one.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/ImageEditPart.java
*/
	protected Object getConstraint( )
	{
		ReportItemHandle handle = (ReportItemHandle) getModel( );
		ReportItemConstraint constraint = new ReportItemConstraint( );
		constraint.setDisplay( handle.getPrivateStyle( ).getDisplay( ) );
		DimensionHandle value = handle.getWidth( );
		constraint.setMeasure(value.getMeasure());
		constraint.setUnits(value.getUnits());
		return constraint;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gef.EditPart#performRequest(org.eclipse.gef.Request)
	 */
	public void performRequest( Request request )
	{
		if ( request.getType( ) == RequestConstants.REQ_OPEN )
		{
			performDirectEdit( );
		}
	}
	/**
	 * 
	 */
	private void performDirectEdit( )
	{
		List dataSetList = DEUtil.getDataSetListExcludeSelf( (DesignElementHandle) getModel( ) );
		ImageBuilder dialog = new ImageBuilder( PlatformUI.getWorkbench( )