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
* the current element has the local structure value, if it has, the method
	 * returns, otherwise, a copy of the structure value inherited from
	 * container or parent will be set locally on the element itself.
	 * <p>
	 * This method is supposed to be used when we need to change the value of a
	 * composite property( a list property or a structure property ). These kind
	 * of property is inherited as a whole, so when the value changed from a
	 * child element. This method will be called to ensure that a local copy
	 * will be made, so change to the child won't affect the original value in
	 * the parent.
	 * 
	 * @param ref
	 *            a reference to a list property or member.
	 */
	void makeLocalCompositeValue( MemberRef ref )
	{
		assert ref != null;
		ElementPropertyDefn propDefn = ref.getPropDefn( );
		if ( ref.getPropDefn( ).isList( ) )
		{
			
			ArrayList list = (ArrayList) element.getLocalProperty( module,
					propDefn );
			if ( list != null )
				return;
			
			ArrayList inherited = (ArrayList) element.getProperty( module,
					propDefn );
			list = new ArrayList( );
			if ( inherited != null )