private String renderTupleExpr(TupleExpr theExpr) throws Exception {
  SparqlTupleExprRenderer aRenderer=new SparqlTupleExprRenderer();
  aRenderer.mIndent=mIndent;
  aRenderer.mContexts=new HashMap<TupleExpr,Var>(mContexts);
  return aRenderer.render(theExpr);
}

private String renderTupleExpr ( TupleExpr theExpr ) throws Exception { SparqlTupleExprRenderer aRenderer = new SparqlTupleExprRenderer ( ) ; aRenderer . mIndent = mIndent ; aRenderer . mContexts = new HashMap < TupleExpr , Var > ( mContexts ) ; return aRenderer . render ( theExpr ) ; }
renders the tuple expression as a query string . it creates a new sparqltupleexprrenderer rather than reusing this one .
