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  package org.apache.cayenne.access.translator.select;
  
  import org.apache.cayenne.access.sqlbuilder.sqltree.Node;
  import org.apache.cayenne.exp.Expression;
  import org.apache.cayenne.exp.parser.ASTDbPath;
  import org.apache.cayenne.exp.parser.ASTPath;
  import org.apache.cayenne.exp.path.CayennePath;
  
  /**
   * @since 4.2
   */
  class TableTreeQualifierStage implements TranslationStage {
  
      @Override
      public void perform(TranslatorContext context) {
          context.getTableTree().visit(node -> {
              appendQualifier(context, node, node.getEntity().getQualifier());
              appendQualifier(context, node, node.getAdditionalQualifier());
          });
  
          if(context.getQualifierNode() != null) {
              context.getSelectBuilder().where(context.getQualifierNode());
          }
      }
  
      private static void appendQualifier(TranslatorContext context, TableTreeNode node, Expression dbQualifier) {
          if (dbQualifier == null) {
              return;
          }
  
          CayennePath pathToRoot = node.getAttributePath();
          dbQualifier = dbQualifier.transform(input ->
                  // here we are not only marking path as prefetch, but changing ObjPath to DB (without )
                  input instanceof ASTPath
                          ? new ASTDbPath(pathToRoot.dot(((ASTPath) input).getPath()).withMarker(CayennePath.PREFETCH_MARKER))
                          : input
          );
          Node translatedQualifier = context.getQualifierTranslator().translate(dbQualifier);
          context.appendQualifierNode(translatedQualifier);
      }
  }
  