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
* <ul>
	 * <li>USER_LABEL: Only the first 3 steps can be visited, if not found,
	 * return null</li>
	 * <li>SHORT_LABEL: All the above 5 steps can be visited. This will ensure
	 * there will be a return value</li>
	 * <li>FULL_LABEL: Besides the return value of SHORT_LABEL, this option
	 * says we need to return additional information. To get this, every child
	 * element needs to overwrite this method</li>
	 * </ul>
	 * 
	 * @param module
	 *            the module
	 * @param level
	 *            the description level.
	 * @return the display label of this element.
	 */
	public String getDisplayLabel( Module module, int level )
	{
		String displayLabel = module.getMessage( getDisplayNameID( ) );
		if ( StringUtil.isBlank( displayLabel ) )
		{
			displayLabel = getDisplayName( );
		}
		if ( StringUtil.isBlank( displayLabel ) )
		{
			displayLabel = getNameForDisplayLabel( );
		}
		if ( level == USER_LABEL )
		{
			return displayLabel;