Bug 120215 BPS 40 - DE changes
1. all report elements' properties will be overidable with an expression. The binding expression will have access to report parameter, and static BIRT report objects only. 2) DE will provide api to get property binding expression for a given property on a report element handle. It's up to the engine to evaluate the property binding expression when the report gets executed. DE API changes -------------------------- a) DesignElementHandle will support the following two methods. - String (expression) GetPropertyBinding ( propertyName ) - void SetPropertyBinding( propertyName , String (expression) ) // Note get and set property methods are wrapper classes which actually use reportDesignHandle methods to retrive and set the property binding. b) rom.def changes Property bindings contains a list of binding expressions. ReportDesign element will be enhanced to support a new property called. <Property canInherit="false" detailType="propertyBinding" displayNameID="Element.Module.propertyBindings" isList="true" name="propertyBindings" type="structure"/> A new datatype - <Structure name="propertybinding"> <Member name="name" since="2.0" type="name"/> <Member name="id" returnType="any" since="2.0" type="string"/> // Use the unique id used to identify an element. <Member name="value" returnType="string" since="2.0" type="expression"/> </Structure>
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/PropertyCommand.java
* <li>If the property is currently set on this element, then the item is
	 * added to the existing list.</li>
	 * <li>If the list is not set on this element, but is set by an ancestor
	 * element, then the list is <strong>copied </strong> onto this element, and
	 * the new element is then appended to the copy.</li>
	 * </ul>
	 * 
	 * @param ref
	 *            reference to the list into which to add the structure
	 * @param item
	 *            the structure to add to the list
	 * @throws SemanticException
	 *             if the item to add is invalid.
	 */
	public void addItem( MemberRef ref, IStructure item )
			throws SemanticException
	{
		assert ref != null;
		if ( item == null )
			return;
		PropertyDefn propDefn = ref.getPropDefn( );
		assert propDefn != null;
		assertExtendedElement( module, element, propDefn );
		if ( item.isReferencable( ) )
			assert !( (ReferencableStructure) item ).hasReferences( );
		checkListMemberRef( ref );
		checkItem( ref, item );
		List list = ref.getList( module, element );
		element.checkStructureList( module, ref.getPropDefn( ), list, item );
		ActivityStack stack = getActivityStack( );