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 boolean hasStyle( )
	{
		return hasStyle;
	}
	/**
	 * Sets whether the element has style properties.
	 * 
	 * @param flag
	 *            True if this element supports style properties, false if not.
	 */
	void setHasStyle( boolean flag )
	{
		assert !isBuilt;
		hasStyle = flag;
	}
	/**
	 * Returns properties definitions as a list.
	 * 
	 * @return list of locally-defined properties.
	 */
	public List getLocalProperties( )
	{
		return new ArrayList( properties.values( ) );
	}
	/**
	 * Returns the properties defined on this element.
	 * 
	 * @return list of properties defined in this element and and all its parent
	 *         elements.
	 */