public AqlExpression Visit(Expression node)
{
switch (node)
{
case null:
return(null);
case ConstantExpression e:
return(AqlConstantExpression.Create(e.Value));
case ParameterExpression e:
return(new AqlParameterExpression(e.Name));
case UnaryExpression e:
return(VisitUnary(e));
case BinaryExpression e:
return(VisitBinary(e));
case MemberExpression e
when e.NodeType == ExpressionType.MemberAccess:
return(VisitMemberAccess(e));
case MethodCallExpression e
when e.NodeType == ExpressionType.Call:
return(VisitCall(e));
case NewArrayExpression e
when e.NodeType == ExpressionType.NewArrayInit:
return(VisitNewArrayInit(e));
case NewExpression e:
return(VisitNew(e));
}
throw new AqlParsingException(
$"Expression {node} cannot be converted to AQL expression"
);
}
/// <summary>
/// See the only usage in ExpressionConverter to understand
/// </summary>
public AqlJsonObjectExpression CallAddViaArgs(
List <AqlExpression> arguments
)
{
if (arguments.Count != 1 && arguments.Count != 2)
{
throw new ArgumentException("Unexpected number of arguments");
}
if (arguments[0].ExpressionType != AqlExpressionType.Constant)
{
throw new AqlParsingException(
"JSON object key cannot be an expression"
);
}
JsonValue keyValue = ((AqlConstantExpression)arguments[0]).Value;
if (!keyValue.IsString || keyValue.IsNull)
{
throw new AqlParsingException(
"JSON object key has to be a non-null string"
);
}
string key = keyValue.AsString;
AqlExpression value = new AqlConstantExpression(JsonValue.Null);
if (arguments.Count == 2)
{
value = arguments[1];
}
return(Add(key, value));
}