private void ParseWhereExpresson(Expression node)
{
var visitor = new WhereExpressionVisitor(context);
visitor.Visit(node);
if (this.context.Fragment.WherePart == null)
{
this.context.Fragment.WherePart = visitor.Condition;
}
else
{
this.context.Fragment.WherePart = this.context.Fragment.WherePart.Concat(visitor.Condition);
}
}
protected override Expression VisitLambda <T>(Expression <T> node)
{
var elementType = typeof(T);
if (elementType.IsGenericType && elementType.GetGenericArguments().Last() == typeof(bool))
{
var visitor = new WhereExpressionVisitor(context);
visitor.Visit(node);
context.Fragment.WherePart = visitor.Condition;
}
else
{
Visit(node.Body);
}
return(node);
}
private Condition GetRelationCondition(string relation, BinaryExpression node)
{
var condition = new GroupCondition();
condition.Relation = relation;
var leftVisitor = new WhereExpressionVisitor(this.Context);
leftVisitor.Visit(node.Left);
condition.Left = leftVisitor.Condition;
var rightVisitor = new WhereExpressionVisitor(this.Context);
rightVisitor.Visit(node.Right);
condition.Right = rightVisitor.Condition;
return(condition);
}