OperationResult

The OperationResult class is the result of almost all the methods in the ISparqlRequestGroup interface (and its children classes) which create expressions in the SPARQL request.

This interface has two main methods:

• The OperationResult.isValid() method returns true if the method was allowed to create the expression
• The OperationResult.getSparqlElement() method returns the element which was created by the method^[1]
  The method will return null if the operation is not valid

Adding a comment on the associated element

The OperationResult.setCommentOnElement(String comment) method allows to add a comment on the associated element. It is a shortcut to:

   OperationResult result = ...
   SparqlElement element = result.getSparqlElement();
   element.setComment(<the comment>);

Example

   SparqlRequest request = new SparqlRequest("sitac");
   request.addSelect("zone");
   request.addAdditionalVariable("index");
   request.addType("zone", "TaskZone");
   request.addPropertyValue("zone", "isTasked", true);
   OperationResult<PropertyRef> propRef = request.addPropertyRef("zone", "hasIndex", "index");
   propRef.setCommentOnElement("Comment on hasIndex");