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/DesignElement.java
return extendsRef.getElement( );
	}
	/**
	 * Resolves the parent element reference.
	 * 
	 * @param module
	 *            the module information needed for the check
	 */
	public void resolveExtends( Module module )
	{
		if ( extendsRef == null || module == null )
			return;
		if ( extendsRef.isResolved( ) )
			return;
		
		
		
		
		
		
		ElementDefn metaData = (ElementDefn) getDefn( );
		PropertyDefn propDefn = (PropertyDefn) metaData
				.getProperty( IDesignElementModel.EXTENDS_PROP );
		int ns = metaData.getNameSpaceID( );
		DesignElement resolvedParent = module
				.resolveElement( ReferenceValueUtil.needTheNamespacePrefix(
						extendsRef, module ), ns, propDefn );
		if ( resolvedParent != null && isExtendsValid( resolvedParent ) )
		{
			extendsRef.resolve( resolvedParent );