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/metadata/ElementDefn.java
properties.put( propName, styles.get( i ) );
			}
		}
		else
		{
			
			
			if ( !hasStyle && stylePropertyNames != null || hasStyle
					&& isContainer( ) && stylePropertyNames != null )
				throw new MetaDataException( new String[]{this.name},
						MetaDataException.DESIGN_EXCEPTION_ILLEGAL_STYLE_PROPS );
		}
	}
	/**
	 * Builds the trigger definition set. This method cached all validators
	 * defined in property definition and slot definition. The cached validators
	 * are used to perform full validation of one element instance.
	 */
	private void buildTriggerDefnSet( )
	{
		AbstractSemanticValidator validator = UnsupportedElementValidator
				.getInstance( );
		SemanticTriggerDefn triggerDefn = new SemanticTriggerDefn( validator
				.getName( ) );
		triggerDefn.setValidator( validator );
		getTriggerDefnSet( ).add( triggerDefn );
		if ( hasStyle )
		{
			validator = StyleReferenceValidator.getInstance( );
			triggerDefn = new SemanticTriggerDefn( StyleReferenceValidator.NAME );