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/Module.java
* @return the design session
	 */
	public DesignSession getSession( )
	{
		return session;
	}
	/**
	 * Finds a shared style in this module itself.
	 * 
	 * @param name
	 *            Name of the style to find.
	 * @return The style, or null if the style is not found.
	 */
	public StyleElement findNativeStyle( String name )
	{
		return (StyleElement) nameSpaces[STYLE_NAME_SPACE].getElement( name );
	}
	/**
	 * Finds a shared style in this module and its included modules.
	 * 
	 * @param name
	 *            Name of the style to find.
	 * @return The style, or null if the style is not found.
	 */
	public StyleElement findStyle( String name )
	{
		ElementRefValue refValue = moduleNameSpaces[STYLE_NAME_SPACE]
				.resolve( name );
		return (StyleElement) refValue.getElement( );
	}