/// <summary>
///
/// </summary>
/// <param name="memberField"></param>
/// <returns></returns>
private static Expression IsNullOrEmpty(MemberExpression memberField)
=> memberField.HasOperator("IsNullOrEmpty")
? Expression.Call(typeof(string), nameof(string.IsNullOrEmpty), null, memberField)
: null;
/// <summary>
///
/// </summary>
/// <param name="memberField"></param>
/// <param name="constant"></param>
/// <returns></returns>
private static Expression EndsWith(MemberExpression memberField, Expression constant)
=> memberField.HasOperator("EndsWith")
? Expression.Call(memberField, memberField.GetOperator("EndsWith"), Expression.Convert(constant, memberField.Type))
: null;
/// <summary>
///
/// </summary>
/// <param name="memberField"></param>
/// <param name="constant"></param>
/// <returns></returns>
private static Expression Like(MemberExpression memberField, Expression constant)
=> memberField.HasOperator("Contains")
? Expression.Call(memberField, memberField.GetOperator("Contains"), Expression.Convert(constant, memberField.Type))
: Equals(memberField, constant);
/// <summary>
///
/// </summary>
/// <param name="memberField"></param>
/// <param name="constant"></param>
/// <returns></returns>
private static Expression DoesNotStartWith(MemberExpression memberField, Expression constant)
=> memberField.HasOperator("StartsWith")
? Expression.Not(Expression.Call(memberField, memberField.GetOperator("StartsWith"), Expression.Convert(constant, memberField.Type)))
: null;
/// <summary>
///
/// </summary>
/// <param name="memberField"></param>
/// <param name="constant"></param>
/// <returns></returns>
private static Expression DoesNotContain(MemberExpression memberField, Expression constant)
=> memberField.HasOperator("Contains")
? Expression.Not(Expression.Call(memberField, memberField.GetOperator("Contains"), Expression.Convert(constant, memberField.Type)))
: null;