public TItem TryLocateItem(IEngineRepository <TItem> navRepository, object findValue)
{
TValue convertedValue = ConversionUtility.ConvertValue <TValue>(findValue);
var predicate = IdentifierExpressionHelpers.GetIdentifierPredicate(_getLocatorValueExpression, convertedValue);
return(navRepository.GetAllItems().Where(predicate).SingleOrDefault());
}
public Expression <Func <TItem, bool> > GetPredicate(string identifier)
{
try
{
TReturn convertedIdentifier = ConversionUtility.ConvertValue <TReturn>(identifier);
return(IdentifierExpressionHelpers.GetIdentifierPredicate(_getterExpr, convertedIdentifier));
}
catch (Exception ex) when(ex is FormatException || ex is InvalidCastException)
{
// TODO hiding exception.. includes FormatException thrown in ConversionUtility
return(null);
}
}
public void SetNavItem(TParent parent, TNav item)
{
// TODO rename? not really anything to do with identifiers
IdentifierExpressionHelpers.SetIdentifier(parent, _navigationExpression, item);
}
public MultiExpressionIdentifierInfo([NotNull] Expression <Func <TItem, IEnumerable <TReturn> > > getterExpr)
{
_getterExpr = getterExpr ?? throw new ArgumentNullException(nameof(getterExpr));
_predicateGetter = identifier => IdentifierExpressionHelpers.GetAnyIdentifierPredicate(_getterExpr, identifier);
}
