public object InvokeMember(Dson dson, string name, params object[] args)
{
Contract.Requires(dson.Bson is BsonArray);
var array = (BsonArray) dson.Bson;
switch (name)
{
case "AddRange":
if (args.Count() == 1 && args[0] is IEnumerable)
array.AddRange(args[0] as dynamic);
else
array.AddRange(args);
return dson;
case "Add":
array.Add((dynamic)args.Single());
return array;
case "Clear":
array.Clear();
return array;
case "Contains":
return args.IfSingleArgument(
arg => array.Contains(arg.AsBson()));
case "Remove":
return args.IfSingleArgument(
arg => array.Remove(arg.AsBson()));
}
return null;
}
object IBehavior.InvokeMember(Dson dson, string name, params object[] args)
{
Contract.Requires(dson.Bson is BsonDocument);
var doc = (BsonDocument) dson.Bson;
switch (name)
{
case "SelectValue":
var @default = args.Length >= 2
? args[1].AsBson()
: null;
return args.IfInitial<string>( (s,a) => doc.SelectValue(s,@default));
}
// This part is is for member setting. E.g. dson.first_name("John").last_name("Mason");
if (args.Length == 1)
{
doc[name] = BsonValue.Create(args[0]);
}
else
{
doc[name] = new BsonArray(args);
}
return dson; // return doc again to allow chaining.
}
bool IBehavior.TrySetMember(Dson dson, string name, object value)
{
Contract.Requires(dson.Bson is BsonDocument);
var bsonDoc = (BsonDocument) dson.Bson;
var v = IsAnonymousType(value.GetType())
? value.ToBsonDocument()
: value;
bsonDoc[name] = BsonValue.Create(v);
return true;
}
bool IBehavior.TryGetMember(Dson dson, string name, out object result)
{
Contract.Requires(dson.Bson is BsonDocument);
var bsonDoc = (BsonDocument) dson.Bson;
if (bsonDoc.Contains(name))
{
result = new Dson(() => bsonDoc[name], b => bsonDoc[name] = b);
return true;
}
// if member not found
bsonDoc[name] = new BsonDocument();
result = new Dson(() => bsonDoc[name], b => bsonDoc[name] = b);
return true;
}
bool IBehavior.TrySetMember(Dson dson, string name, object value)
{
// arrays have no member to set.
return false;
}
bool IBehavior.TryGetMember(Dson dson, string name, out object result)
{
// arrays have no member to get.
result = null;
return false;
}