internal OrderByItemCollection Clone()
{
OrderByItemCollection result = new OrderByItemCollection();
foreach( OrderByItem item in this.InnerList )
{
result.Add(item); // clone item?
}
return result;
}
internal OrderByItemCollection Clone()
{
OrderByItemCollection result = new OrderByItemCollection();
foreach (OrderByItem item in this.InnerList)
{
result.Add(item); // clone item?
}
return(result);
}
public OrderBy Parse(Type type, string expression)
{
// Example expressions for an Employee query:
// "FirstName, LastName"
// "FirstName ASC, LastName DESC"
// "Company.Name"
// "Company.Name ASC"
// "Company.Address.State ASC"
// "Company.Name ASC, Company.Address.State ASC, FirstName ASC"
// "Company.Name ASC, HomeAddress.ZipCode, Company.Address.State DESC, ZipCode"
_expression = expression;
EntityMap entity = _maps[type];
if (entity == null)
{
throw new Exception("Type " + type + " does not have an entity mapping defined to the database.");
}
OrderByItemCollection items = new OrderByItemCollection();
OrderByJoinCollection joins = new OrderByJoinCollection();
using (StringReader reader = new StringReader(expression))
{
OPathLexer lexer = new OPathLexer(reader);
lexer.Lex();
while (lexer.CurrentToken != null)
{
OrderByItem item = ParseItem(lexer, entity, joins, null);
items.Add(item);
}
if (lexer.LastToken != null && lexer.LastToken.Type == TokenType.COMMA)
{
throw new OPathException("A trailing comma was detected in sort expression '" + expression + "'.");
}
}
return(new OrderBy(null, items, joins));
}
public OrderBy Parse(Type type, string expression)
{
// Example expressions for an Employee query:
// "FirstName, LastName"
// "FirstName ASC, LastName DESC"
// "Company.Name"
// "Company.Name ASC"
// "Company.Address.State ASC"
// "Company.Name ASC, Company.Address.State ASC, FirstName ASC"
// "Company.Name ASC, HomeAddress.ZipCode, Company.Address.State DESC, ZipCode"
_expression = expression;
EntityMap entity = _maps[type];
if( entity == null )
{
throw new Exception("Type " + type + " does not have an entity mapping defined to the database.");
}
OrderByItemCollection items = new OrderByItemCollection();
OrderByJoinCollection joins = new OrderByJoinCollection();
using( StringReader reader = new StringReader(expression) )
{
OPathLexer lexer = new OPathLexer(reader);
lexer.Lex();
while( lexer.CurrentToken != null )
{
OrderByItem item = ParseItem(lexer, entity, joins, null);
items.Add(item);
}
if( lexer.LastToken != null && lexer.LastToken.Type == TokenType.COMMA )
{
throw new OPathException("A trailing comma was detected in sort expression '" + expression + "'.");
}
}
return new OrderBy(null, items, joins);
}