Support string variables.

Fixes #180
RubenVerborgh · Aug 23, 2024 · bbf4120 · bbf4120
1 parent 44a30f5
commit bbf4120
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/lib/SparqlGenerator.js b/lib/SparqlGenerator.js
@@ -36,8 +36,16 @@ Generator.prototype.toQuery = function (q) {
 
   if (q.variables){
     query += mapJoin(q.variables, undefined, function (variable) {
-      return isTerm(variable) ? this.toEntity(variable) :
-             '(' + this.toExpression(variable.expression) + ' AS ' + variableToString(variable.variable) + ')';
+      // String variable
+      if (/^[?$]/.test(variable))
+        return variable;
+      // Entity object
+      else if (isTerm(variable))
+        return this.toEntity(variable);
+      // Expression object
+      else
+        return '(' + this.toExpression(variable.expression) +
+          ' AS ' + variableToString(variable.variable) + ')';
     }, this) + ' ';
   }
   else if (q.template)