Bug 149251 Inconsistent Handling of a Non-inheritable ROM Property
For a ROM property defined to be non-inheritable, an empty string property value should be consistently handled as an empty string, not as null. For example, an oda.dataSource extension defines a data source property with canInherit=false. When a oda-data-source handle get saved in a report design, it correctly includes the tag for such property, even when an empty string value is specified. <oda-data-source extensionID="my.oda.plugin" name="my Data Source" id="24"> ... <property name="ApplicationServer"></property> </oda-data-source> However, later when using the DE API to read its property value, a null is returned. Then when the report design is subsequently saved, the property tag is lost. Expects that an empty string value of a non-inhertiable property should be preserved.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
* search algorithm: Language&Country, language, default.
	 * 
	 * @param resourceKey
	 *            Resource key of the user defined message.
	 * @param locale
	 *            locale of message, if the input <code>locale</code> is
	 *            <code>null</code>, the locale for the current thread will
	 *            be used instead.
	 * @return the corresponding locale-dependent messages. Return
	 *         <code>null</code> if resoueceKey is blank.
	 */
	public String getMessage( String resourceKey, Locale locale )
	{
		return getModule( )
				.getMessage( resourceKey, ULocale.forLocale( locale ) );
	}
	/**
	 * Finds user-defined messages for the given locale.
	 * <p>
	 * First we look up in the report itself, then look into the referenced
	 * message file. Each search uses a reduced form of Java locale-driven
	 * search algorithm: Language&Country, language, default.
	 * 
	 * @param resourceKey
	 *            Resource key of the user defined message.
	 * @param locale
	 *            locale of message, if the input <code>locale</code> is
	 *            <code>null</code>, the locale for the current thread will
	 *            be used instead.
	 * @return the corresponding locale-dependent messages. Return