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
*/
	public IPropertyDefn findProperty( String propName )
	{
		return getProperty( propName );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.metadata.ObjectDefn#addProperty(org.eclipse.birt.report.model.metadata.PropertyDefn)
	 */
	public void addProperty( PropertyDefn property ) throws MetaDataException
	{
		MetaDataDictionary dd = MetaDataDictionary.getInstance( );
		
		if ( dd.getElement( extendsFrom ) != null )
		{
			ElementDefn parentTemp = (ElementDefn) dd.getElement( extendsFrom );
			while ( parentTemp != null )
			{
				if ( parentTemp.properties.containsKey( property.getName( ) ) )
				{
					throw new MetaDataException(
							new String[]{property.getName( ), this.name},
							MetaDataException.DESIGN_EXCEPTION_DUPLICATE_PROPERTY );
				}
				parentTemp = (ElementDefn) dd.getElement( parentTemp
						.getExtends( ) );
			}
		}