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/tools/ReportCreationTool.java
import org.eclipse.birt.report.designer.core.model.SessionHandleAdapter;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.LabelEditPart;
import org.eclipse.birt.report.designer.nls.Messages;
import org.eclipse.birt.report.designer.util.DNDUtil;
import org.eclipse.birt.report.model.api.DataItemHandle;
import org.eclipse.birt.report.model.api.LabelHandle;
import org.eclipse.birt.report.model.api.LibraryHandle;
import org.eclipse.birt.report.model.api.TextItemHandle;
import org.eclipse.birt.report.model.api.elements.ReportDesignConstants;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gef.GraphicalEditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.CreationFactory;
import org.eclipse.gef.tools.CreationTool;
import org.eclipse.swt.widgets.Display;
/**
 * Customizes eclipse creation tool to popup element builders.
 */
public class ReportCreationTool extends CreationTool
{
	private static final String MODEL_CREATE_ELEMENT_TRANS = Messages.getString( "ReportCreationTool.ModelTrans.CreateElement" ); 
	private AbstractToolHandleExtends preHandle;
	
	private boolean isCreating = false;
	/**