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
* @param locale
	 *            locale for the translation. Locale is in java-defined format(
	 *            en, en-US, zh_CN, etc.)
	 * @return the <code>Translation</code> that matches. return null if the
	 *         translation is not found in the report.
	 */
	public Translation findTranslation( String resourceKey, String locale )
	{
		return translations.findTranslation( resourceKey, locale );
	}
	/**
	 * Returns if the specified translation is contained in the translation
	 * table.
	 * 
	 * @param trans
	 *            a given <code>Translation</code>
	 * @return <code>true</code> if the <code>Translation</code> is
	 *         contained in the translation talbe, return <code>false</code>
	 *         otherwise.
	 */
	public boolean contains( Translation trans )
	{
		return translations.contains( trans );
	}
	/**
	 * Returns the whole collection of translations defined for the report
	 * module.
	 * <p>
	 * 
	 * @return a list containing all the Translations.