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/ReferencableStructure.java
protected Object clone( ) throws CloneNotSupportedException
	{
		ReferencableStructure struct = (ReferencableStructure) super.clone( );
		struct.libReference = null;
		struct.clients = new ArrayList( );
		struct.clientStructures = new ArrayList( );
		
		Iterator propIter = getDefn( ).getPropertyIterator( );
		while ( propIter.hasNext( ) )
		{
			PropertyDefn prop = (PropertyDefn) propIter.next( );
			
			
			if ( struct.getLocalProperty( null, prop ) != null
					|| LIB_REFERENCE_MEMBER.equals( prop.getName( ) ) )
				continue;
			StructRefValue libRef = this.libReference;
			while ( libRef != null )
			{
				ReferencableStructure libStructure = libReference
						.getTargetStructure( );
				Object value = libStructure.getLocalProperty( null, prop );
				if ( value != null )
					struct.setProperty( prop, value );
				libRef = (StructRefValue) libStructure.getLocalProperty( null, LIB_REFERENCE_MEMBER );
			}
		}
		return struct;
	}
	/**