public override SqlInfo[] ConvertToSql(Expression expression, int level, ConvertFlags flags)
{
if (expression == null)
return _key.ConvertToSql(null, 0, flags);
if (level > 0)
{
switch (expression.NodeType)
{
case ExpressionType.Call :
{
var e = (MethodCallExpression)expression;
if (e.Method.DeclaringType == typeof(Enumerable))
{
return new[] { new SqlInfo { Sql = ParseEnumerable(e) } };
}
break;
}
case ExpressionType.MemberAccess :
{
if (level != 0)
{
var levelExpression = expression.GetLevelExpression(level);
if (levelExpression.NodeType == ExpressionType.MemberAccess)
{
var e = (MemberExpression)levelExpression;
if (e.Member.Name == "Key")
{
if (_keyProperty == null)
_keyProperty = _groupingType.GetProperty("Key");
if (e.Member == _keyProperty)
{
if (levelExpression == expression)
return _key.ConvertToSql(null, 0, flags);
return _key.ConvertToSql(expression, level + 1, flags);
}
}
}
}
break;
}
}
}
throw new NotImplementedException();
}
public override SqlInfo[] ConvertToSql(Expression expression, int level, ConvertFlags flags)
{
if (expression == null)
{
return(_key.ConvertToSql(null, 0, flags));
}
if (level > 0)
{
switch (expression.NodeType)
{
case ExpressionType.Call:
{
var e = (MethodCallExpression)expression;
if (e.IsQueryable() || e.IsAggregate(Builder.MappingSchema))
{
return(new[] { new SqlInfo {
Sql = ConvertEnumerable(e)
} });
}
break;
}
case ExpressionType.MemberAccess:
{
var levelExpression = expression.GetLevelExpression(Builder.MappingSchema, level);
if (levelExpression.NodeType == ExpressionType.MemberAccess)
{
var e = (MemberExpression)levelExpression;
if (e.Member.Name == "Key")
{
if (_keyProperty == null)
{
_keyProperty = _groupingType.GetPropertyEx("Key");
}
if (e.Member == _keyProperty)
{
if (ReferenceEquals(levelExpression, expression))
{
return(_key.ConvertToSql(null, 0, flags));
}
return(_key.ConvertToSql(expression, level + 1, flags));
}
}
return(Sequence.ConvertToSql(expression, level, flags));
}
break;
}
}
}
throw new LinqException("Expression '{0}' cannot be converted to SQL.", expression);
}
public override SqlInfo[] ConvertToSql(Expression?expression, int level, ConvertFlags flags)
{
if (expression == null)
{
if (flags == ConvertFlags.Field && !_key.IsScalar)
{
return(Element.ConvertToSql(null, 0, flags));
}
var keys = _key.ConvertToSql(null, 0, flags);
for (var i = 0; i < keys.Length; i++)
{
var key = keys[i];
keys[i] = key.AppendMember(_keyProperty !);
}
return(keys);
}
if (level == 0 && expression.NodeType == ExpressionType.MemberAccess)
{
level += 1;
}
if (level > 0)
{
switch (expression.NodeType)
{
case ExpressionType.Call:
{
var e = (MethodCallExpression)expression;
if (e.IsQueryable() || e.IsAggregate(Builder.MappingSchema))
{
return(new[] { new SqlInfo(ConvertEnumerable(e)) });
}
break;
}
case ExpressionType.MemberAccess:
{
var levelExpression = expression.GetLevelExpression(Builder.MappingSchema, level);
if (levelExpression.NodeType == ExpressionType.MemberAccess)
{
var e = (MemberExpression)levelExpression;
if (e.Member.Name == "Key")
{
if (_keyProperty == null)
{
_keyProperty = _groupingType.GetProperty("Key");
}
if (e.Member == _keyProperty)
{
if (ReferenceEquals(levelExpression, expression))
{
return(_key.ConvertToSql(null, 0, flags));
}
return(_key.ConvertToSql(expression, level + 1, flags));
}
}
return(Sequence.ConvertToSql(expression, level, flags));
}
break;
}
}
}
throw new LinqException("Expression '{0}' cannot be converted to SQL.", expression);
}
public override SqlInfo[] ConvertToSql(Expression expression, int level, ConvertFlags flags)
{
if (expression == null)
{
return(_key.ConvertToSql(null, 0, flags));
}
if (level > 0)
{
switch (expression.NodeType)
{
case ExpressionType.Call:
{
var e = (MethodCallExpression)expression;
if (e.Method.DeclaringType == typeof(Enumerable))
{
return(new[] { new SqlInfo {
Sql = ConvertEnumerable(e)
} });
}
break;
}
case ExpressionType.MemberAccess:
{
var levelExpression = expression.GetLevelExpression(level);
if (levelExpression.NodeType == ExpressionType.MemberAccess)
{
var e = (MemberExpression)levelExpression;
if (e.Member.Name == "Key")
{
if (_keyProperty == null)
{
_keyProperty = _groupingType.GetProperty("Key");
}
if (e.Member == _keyProperty)
{
if (levelExpression == expression)
{
return(_key.ConvertToSql(null, 0, flags));
}
return(_key.ConvertToSql(expression, level + 1, flags));
}
}
return(Sequence.ConvertToSql(expression, level, flags));
}
break;
}
}
}
throw new InvalidOperationException();
}
