mirror of https://github.com/Radarr/Radarr
37 lines
1.3 KiB
C#
37 lines
1.3 KiB
C#
|
using System;
|
|||
|
|
using System.Data.Common;
|
|||
|
|
using Marr.Data.QGen.Dialects;
|
|||
|
|
using System.Linq.Expressions;
|
|||
|
|
|
|||
|
|
namespace Marr.Data.QGen
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// This class overrides the WhereBuilder which utilizes the ExpressionVisitor base class,
|
|||
|
|
/// and it is responsible for translating the lambda expression into a "JOIN ON" clause.
|
|||
|
|
/// It populates the protected string builder, which outputs the "JOIN ON" clause when the ToString method is called.
|
|||
|
|
/// </summary>
|
|||
|
|
/// <typeparam name="T">The entity that is on the left side of the join.</typeparam>
|
|||
|
|
/// <typeparam name="T2">The entity that is on the right side of the join.</typeparam>
|
|||
|
|
public class JoinBuilder<T, T2> : WhereBuilder<T>
|
|||
|
|
{
|
|||
|
|
public JoinBuilder(DbCommand command, Dialect dialect, Expression<Func<T, T2, bool>> filter, TableCollection tables)
|
|||
|
|
: base(command, dialect, filter.Body, tables, false, true)
|
|||
|
|
{ }
|
|||
|
|
|
|||
|
|
protected override string PrefixText
|
|||
|
|
{
|
|||
|
|
get
|
|||
|
|
{
|
|||
|
|
return "ON";
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected override Expression VisitMemberAccess(MemberExpression expression)
|
|||
|
|
{
|
|||
|
|
string fqColumn = GetFullyQualifiedColumnName(expression.Member, expression.Expression.Type);
|
|||
|
|
_sb.Append(fqColumn);
|
|||
|
|
return expression;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|