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
if ( prop == null )
			return 0;
		PropertyType type = MetaDataDictionary.getInstance( ).getPropertyType(
				prop.getTypeCode( ) );
		Object value = getProperty( module, propName );
		if ( value instanceof Double )
			return ( (Double) value ).doubleValue( );
		return type.toDouble( module, value );
	}
	/**
	 * Gets the value of a property as a boolean.
	 * 
	 * @param module
	 *            the module
	 * @param propName
	 *            the name of the property to get
	 * @return the property value as a boolean. Returns false if the property is
	 *         not set, or not defined, or cannot convert to a boolean.
	 */
	public boolean getBooleanProperty( Module module, String propName )
	{
		ElementPropertyDefn prop = getPropertyDefn( propName );
		if ( prop == null )
			return false;
		PropertyType type = MetaDataDictionary.getInstance( ).getPropertyType(
				prop.getTypeCode( ) );
		Object value = getProperty( module, propName );
		return ( (BooleanPropertyType) type ).toBoolean( module, value );
	}
	/**