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/core/DesignElement.java
return getProperty( module, prop );
	}
	/**
	 * Creates the Factory data structures for specialized property access. This
	 * method uses specialized property resolution rules:
	 * <p>
	 * <ul>
	 * <li>A property value is either a style property or a non-style property.
	 * </li>
	 * <li>A non-style property is set if this element, or any of its ancestor
	 * elements, provide a value. It is also considered set if the system
	 * provides a default value.</li>
	 * <li>A property value is considered set only if it is set in the private
	 * style of this element or an ancestor element; it is not considered set if
	 * it is inherited from a shared style.</li>
	 * </ul>
	 * 
	 * @param module
	 *            module
	 * @param propName
	 *            name of the property
	 * @return the value of the property according to the rules explained above
	 */
	public Object getFactoryProperty( Module module, String propName )
	{
		ElementPropertyDefn prop = getPropertyDefn( propName );
		
		if ( prop == null )
			return null;
		return getFactoryProperty( module, prop );