public Dictionary(IConvertibleToBsonDocument document)
{
if (document == null)
{
throw new ArgumentNullException("document");
}
_document = document.ToBsonDocument();
}
// public for tests
public static Expression GetExpression(IConvertibleToBsonDocument update, IConvertibleToBsonDocument query, bool insert)
{
var compiler = new UpdateCompiler();
Expression expression = Expression.Constant(compiler, typeof(UpdateCompiler));
if (update == null)
{
return(expression);
}
if (insert)
{
expression = UpdateFromQueryExpression(expression, query);
}
var document = update.ToBsonDocument();
bool isName = false;
bool isOper = false;
var names = new List <string>();
foreach (var element in document)
{
var name = element.Name;
if (name[0] == '$')
{
if (isName)
{
ThrowMixedOperatorsAndNames();
}
isOper = true;
foreach (var fieldElement in element.Value.AsBsonDocument)
{
var fieldName = fieldElement.Name;
ValidateFieldName(fieldName, names);
expression = OperatorExpression(expression, name, Expression.Constant(fieldName, typeof(string)), fieldElement.Value, insert);
}
}
else //_131103_204607
{
if (isOper)
{
ThrowMixedOperatorsAndNames();
}
isName = true;
ValidateFieldName(name, names);
expression = SetExpression(expression, Expression.Constant(name, typeof(string)), element.Value);
}
}
return(expression);
}
// public for tests
public static Expression GetExpression(IConvertibleToBsonDocument query)
{
if (query == null)
return Expression.Constant(true, typeof(bool));
var document = query.ToBsonDocument();
switch (document.ElementCount)
{
case 1:
return ElementExpression(document.GetElement(0));
case 0:
return Expression.Constant(true, typeof(bool));
default:
return DocumentExpression(document);
}
}
// public for tests
public static Expression GetExpression(IConvertibleToBsonDocument update, IConvertibleToBsonDocument query, bool insert)
{
var compiler = new UpdateCompiler();
Expression expression = Expression.Constant(compiler, typeof(UpdateCompiler));
if (update == null)
return expression;
if (insert)
expression = UpdateFromQueryExpression(expression, query);
var document = update.ToBsonDocument();
bool isName = false;
bool isOper = false;
var names = new List<string>();
foreach (var element in document)
{
var name = element.Name;
if (name[0] == '$')
{
if (isName) ThrowMixedOperatorsAndNames();
isOper = true;
foreach (var fieldElement in element.Value.AsBsonDocument)
{
var fieldName = fieldElement.Name;
ValidateFieldName(fieldName, names);
expression = OperatorExpression(expression, name, Expression.Constant(fieldName, typeof(string)), fieldElement.Value, insert);
}
}
else //_131103_204607
{
if (isOper) ThrowMixedOperatorsAndNames();
isName = true;
ValidateFieldName(name, names);
expression = SetExpression(expression, Expression.Constant(name, typeof(string)), element.Value);
}
}
return expression;
}
// public for tests
public static Expression GetExpression(IConvertibleToBsonDocument query)
{
if (query == null)
{
return(Expression.Constant(true, typeof(bool)));
}
var document = query.ToBsonDocument();
switch (document.ElementCount)
{
case 1:
return(ElementExpression(document.GetElement(0)));
case 0:
return(Expression.Constant(true, typeof(bool)));
default:
return(DocumentExpression(document));
}
}
static Expression UpdateFromQueryExpression(Expression that, IConvertibleToBsonDocument query)
{
if (query == null)
{
return(that);
}
foreach (var element in query.ToBsonDocument())
{
// v2.6 fails
if (element.Name[0] == '$')
{
throw new ArgumentException(string.Format(null, "Unknown top level query operator: ({0}).", element.Name));
}
var selector = element.Value;
switch (selector.BsonType)
{
case BsonType.RegularExpression:
continue;
case BsonType.Document: //TODO _140223_223449
var document = selector.AsBsonDocument;
if (document.ElementCount > 0)
{
var name = document.GetElement(0).Name;
if (name[0] == '$' && name != "$ref")
{
continue;
}
}
break;
}
that = UpdateCompiler.SetExpression(that, Expression.Constant(element.Name, typeof(string)), selector);
}
return(that);
}
public Dictionary(IConvertibleToBsonDocument document)
{
if (document == null) throw new ArgumentNullException("document");
_document = document.ToBsonDocument();
}
static Expression UpdateFromQueryExpression(Expression that, IConvertibleToBsonDocument query)
{
if (query == null)
return that;
foreach (var element in query.ToBsonDocument())
{
if (element.Name[0] == '$')
continue;
var selector = element.Value;
switch(selector.BsonType)
{
case BsonType.RegularExpression:
continue;
case BsonType.Document:
var document = selector.AsBsonDocument;
if (document.ElementCount > 0)
{
var name = document.GetElement(0).Name;
if (name[0] == '$' && name != "$ref")
continue;
}
break;
}
that = UpdateCompiler.SetExpression(that, Expression.Constant(element.Name, typeof(string)), selector);
}
return that;
}