public static ExpressionComparer[] ParseOrderBy(Graph graph, VariableMap variableMap, IOrderByExecutionHelper executionHelper, OrderByNode orderByNode, QueryExpressionInfo exprInfo, int columnCount)
{
if (executionHelper == null || orderByNode == null || variableMap == null || graph == null || exprInfo == null)
{
throw new ArgumentNullException($"Order by result processor, passing null arguments to the constructor.");
}
var orderByVisitor = new OrderByVisitor(graph.labels, variableMap, exprInfo);
orderByVisitor.Visit(orderByNode);
var comps = orderByVisitor.GetResult();
executionHelper.IsSetOrderBy = true;
return(comps.ToArray());
}
/// <summary>
/// Creates an order by object.
/// </summary>
/// <param name="graph"> A graph the query is computed on. </param>
/// <param name="variableMap"> A map of query variables. </param>
/// <param name="executionHelper"> An order by execution helper. </param>
/// <param name="orderByNode"> A parse tree of order by expression. </param>
/// <param name="exprInfo"> A query expression information. </param>
public OrderByObject(Graph graph, VariableMap variableMap, IOrderByExecutionHelper executionHelper, OrderByNode orderByNode, QueryExpressionInfo exprInfo)
{
if (executionHelper == null || orderByNode == null || variableMap == null || graph == null || exprInfo == null)
{
throw new ArgumentNullException($"{this.GetType()}, passing null arguments to the constructor.");
}
this.helper = executionHelper;
var orderByVisitor = new OrderByVisitor(graph.labels, variableMap, exprInfo);
orderByVisitor.Visit(orderByNode);
var comps = orderByVisitor.GetResult();
executionHelper.IsSetOrderBy = true;
this.comparers = comps.ToArray();
}
