public Translator(SerializationSettings serializationSettings)
{
_rootOperation = new WhereOperation(serializationSettings);
_serializationSettings = serializationSettings;
_currentOperation = _rootOperation;
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
Trace.WriteLine($"VisitMethodCall for {node}");
if (node.Method.Name == "Contains")
{
var operation = new CompareOperation(_serializationSettings, ComparisionMode.Contains);
var previousOperation = _currentOperation;
this._currentOperation.Add(operation);
this._currentOperation = operation;
var retVal = base.VisitMethodCall(node);
this._currentOperation = previousOperation;
return(retVal);
}
return(node);
}
protected override Expression VisitBinary(BinaryExpression node)
{
Trace.WriteLine($"VisitBinary for {node}");
OperationBase operationForThisNode = null;
switch (node.NodeType)
{
case ExpressionType.Equal:
operationForThisNode = new EqualityOperation(_serializationSettings);
break;
case ExpressionType.NotEqual:
// _sql.Append(" <> ");
break;
case ExpressionType.AndAlso:
case ExpressionType.And:
operationForThisNode = new AndOperation(_serializationSettings);
break;
case ExpressionType.Or:
// _sql.Append(" OR ");
break;
}
var previousOperation = this._currentOperation;
previousOperation.Add(operationForThisNode);
this._currentOperation = operationForThisNode;
Visit(node.Left);
Visit(node.Right);
this._currentOperation = previousOperation;
return(node);
}
public void Add(OperationBase operation)
{
this.Children.Add(operation);
}