Bug 121352 The data set binding property cannot be retrieved in report preview layout
In report preview page, the datasource/dataset property binding lists cannot be retrieved. The dataset binding can not work correctly in layout preview because it's value cannot get from the binding list. But in the data set edit page, the binding value can be got. You can refer to the attachment.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
public final static long NO_BASE_ID = -1;
	/**
	 * Support for id inheritance. If it is set, base id must be larger than
	 * <code>0</code>.
	 */
	protected long baseId = NO_BASE_ID;
	/**
	 * Default constructor.
	 */
	public DesignElement( )
	{
		
	}
	/**
	 * Constructs the design element with the name.
	 * 
	 * @param theName
	 *            initial element name
	 */
	public DesignElement( String theName )
	{
		name = theName;
	}
	/**
	 * Registers a listener. A listener can be registered any number of times,
	 * but will receive each event only once.
	 * <p>
	 * Part of: Notification system.
	 * 
	 * @param obj