public virtual string BuildExpression(QNode node)
{
if (node == null)
{
return(null);
}
if (node is QRawSqlNode)
{
return(((QRawSqlNode)node).SqlText);
}
if (node is QGroupNode)
{
return(BuildGroup((QGroupNode)node));
}
if (node is QConditionNode)
{
return(BuildCondition((QConditionNode)node));
}
if (node is QNegationNode)
{
return(BuildNegation((QNegationNode)node));
}
throw new ArgumentException("Cannot build node with such type", node.GetType().ToString());
}
internal static QNode MapQValue(QNode qNode, Func <IQueryValue, IQueryValue> mapFunc)
{
if (qNode is QGroupNode)
{
var group = new QGroupNode((QGroupNode)qNode);
for (int i = 0; i < group.Nodes.Count; i++)
{
group.Nodes[i] = MapQValue(group.Nodes[i], mapFunc);
}
return(group);
}
if (qNode is QConditionNode)
{
var origCndNode = (QConditionNode)qNode;
var cndNode = new QConditionNode(origCndNode.Name,
mapFunc(origCndNode.LValue),
origCndNode.Condition,
mapFunc(origCndNode.RValue));
return(cndNode);
}
if (qNode is QNegationNode)
{
var negNode = new QNegationNode((QNegationNode)qNode);
for (int i = 0; i < negNode.Nodes.Count; i++)
{
negNode.Nodes[i] = MapQValue(negNode.Nodes[i], mapFunc);
}
return(negNode);
}
return(qNode);
}
private void SetVarsInternal(QNode node, Action <QVar> setVar)
{
if (node is QConditionNode)
{
var cndNode = (QConditionNode)node;
if (cndNode.LValue is QVar)
{
setVar((QVar)cndNode.LValue);
}
if (cndNode.RValue is QVar)
{
setVar((QVar)cndNode.RValue);
}
}
if (node != null)
{
foreach (var cNode in node.Nodes)
{
SetVarsInternal(cNode, setVar);
}
}
}
/// <summary>
/// Initializes a new instance of the QueryNegationNode that wraps specified node
/// </summary>
/// <param name="node">condition node to negate</param>
public QNegationNode(QNode node)
{
SingleNodeList = new QNode[] { node };
}
/// <summary>
/// Initializes a new instance of the Query with specified table and condition
/// </summary>
/// <param name="table">target table</param>
/// <param name="condition">conditions root node</param>
public Query(QTable table, QNode condition)
{
_Table = table;
Condition = condition;
}