package eu.fbk.rdfpro.util;
   
   import java.util.Map;
   
   import javax.annotation.Nullable;
   
   import org.openrdf.query.QueryLanguage;
   import org.openrdf.query.parser.ParsedQuery;
   import org.openrdf.queryrender.QueryRenderer;
  
  /**
   * Implementation of {@link QueryRenderer} based on RDFpro rendering capabilities.
   */
  public class QueryRendererImpl implements QueryRenderer {
  
      @Nullable
      private final Map<String, String> prefixes;
  
      private final boolean forceSelect;
  
      public QueryRendererImpl(@Nullable final Map<String, String> prefixes,
              final boolean forceSelect) {
          this.prefixes = prefixes;
          this.forceSelect = forceSelect;
      }
  
      @Override
      public QueryLanguage getLanguage() {
          return QueryLanguage.SPARQL;
      }
  
      @Override
      public String render(final ParsedQuery query) throws Exception {
          return Algebra.renderQuery(query.getTupleExpr(), query.getDataset(), this.prefixes,
                  this.forceSelect);
      }
  
  }