private static FieldsBuilder ParseProjection(string projection)
{
var fields = new FieldsBuilder();
if (String.IsNullOrEmpty(projection))
{
return(fields);
}
var projectionDocument = BsonSerializer.Deserialize <BsonDocument>(projection);
foreach (var element in projectionDocument)
{
var value = element.Value;
if (value.IsBoolean && value.AsBoolean || value.IsInt32 && value.AsInt32 != 0)
{
fields.Include(element.Name);
}
else if (value.IsBoolean && !value.AsBoolean || value.IsInt32 && value.AsInt32 == 0)
{
fields.Exclude(element.Name);
}
else
{
throw Errors.InvalidProjectionFormat();
}
}
return(fields);
}
protected override FrameDLRObject ParseExpress(FrameDLRObject obj)
{
var rtn = FrameDLRObject.CreateInstance();
var query = new QueryDocument(true);
var update = new UpdateDocument(true);
FrameDLRObject insert = FrameDLRObject.CreateInstance(FrameDLRFlags.SensitiveCase);
var fields = new FieldsBuilder();
var collectionname = "";
foreach (var k in obj.Keys)
{
if (k.StartsWith("$"))
{
if (k.ToLower() == "$where")
{
WhereExpress((FrameDLRObject)obj.GetValue(k), query, fields);
}
else if (k.ToLower() == "$table")
{
if (obj.GetValue(k) is string)
{
collectionname = ComFunc.nvl(obj.GetValue(k));
}
}
}
else
{
var v = obj.GetValue(k);
if (this.CurrentAct == ActType.Query)
{
if (v is bool)
{
var bisinclude = (bool)v;
if (bisinclude)
{
fields.Include(k);
}
else
{
fields.Exclude(k);
}
}
}
else if (this.CurrentAct == ActType.Insert)
{
insert.SetValue(k, v);
}
else
{
if (!(v is FrameDLRObject))
{
update.Add(k, BsonValue.Create(v));
}
}
}
}
rtn.query = query;
rtn.update = update;
rtn.insert = insert;
rtn.fields = fields;
rtn.table = collectionname;
return(rtn);
}
