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/core/Module.java
String msg = translations.getMessage( resourceKey, locale );
		if ( msg != null )
			return msg;
		
		String baseName = getStringProperty( this, INCLUDE_RESOURCE_PROP );
		if ( baseName == null )
			return null;
		
		msg = BundleHelper.getHelper( this, baseName ).getMessage( resourceKey,
				locale );
		return msg;
	}
	/**
	 * Return the folder in which the design file is located. The search depend
	 * on the {@link #getFileName()}.
	 * 
	 * @return the folder in which the design file is located. Return
	 *         <code>null</code> if the folder can not be found.
	 * @deprecated since BIRT 2.1. find the message in resource path.
	 */
	private File getModuleFolder( )
	{
		if ( systemId == null )
			return null;
		return new File( systemId.getFile( ) );
	}
	/**
	 * Finds a custom color by name.
	 *