protected override Expression VisitMethodCall(MethodCallExpression expression)
{
if (expression.Method.Name == "As" && expression.Method.DeclaringType == typeof(Aql))
{
Visit(expression.Arguments[0]);
return(expression);
}
if (expression.Method.Name == "get_Item" && expression.Method.DeclaringType.Name == "IList`1")
{
Visit(expression.Object);
ModelVisitor.QueryText.Append(" [ ");
Visit(expression.Arguments[0]);
ModelVisitor.QueryText.Append(" ] ");
return(expression);
}
string methodName = expression.Method.Name;
bool prop = false;
if (expression.Method.DeclaringType == typeof(Math))
{
if (MathMethods.TryGetValue(expression.Method.Name, out var m))
{
methodName = m;
}
else
{
throw new InvalidOperationException($"Method {expression.Method.Name} is not supported in ArangoLinqProvider");
}
}
else
{
var aqlFunction = expression.Method.GetCustomAttribute <AqlFunctionAttribute>();
if (aqlFunction == null)
{
throw new InvalidOperationException($"Method {expression.Method.Name} is not supported in ArangoLinqProvider");
}
methodName = aqlFunction.Name;
prop = aqlFunction.IsProperty;
}
string argumentSeprator = null;
var noParenthesis = MethodsWithNoParenthesis.TryGetValue(methodName, out argumentSeprator) || prop;
if (!noParenthesis)
{
ModelVisitor.QueryText.AppendFormat(" {0}( ", methodName);
argumentSeprator = " , ";
}
Type[] genericArguments = null;
if (MethodsWithFirstGenericArgument.Contains(methodName))
{
genericArguments = expression.Method.GetGenericArguments();
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[0]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
if (MethodsWithSecondGenericArgument.Contains(methodName))
{
var collection = LinqUtility.ResolveCollectionName(ModelVisitor.Db, genericArguments[1]);
ModelVisitor.QueryText.AppendFormat(" {0}{1}", collection, argumentSeprator);
}
for (var i = 0; i < expression.Arguments.Count; i++)
{
Visit(expression.Arguments[i]);
if (i != expression.Arguments.Count - 1)
{
ModelVisitor.QueryText.Append(argumentSeprator);
}
}
if (!noParenthesis)
{
ModelVisitor.QueryText.Append(" ) ");
}
return(expression);
}