private string GetIdHint(IdHinter second)
{
if (ShouldReturnIdHint(second, this))
return second.GetIdHint();
return ShouldReturnIdHint(this, second) ? GetIdHint() : null;
}
/// <summary>
/// Gets the id hint. Only returns an Id if <paramref name="constraint"/> is an <see cref="AttributeConstraint"/> on an exact Id or
/// if the <paramref name="constraint"/> is an <see cref="AndConstraint"/> with an <see cref="AttributeConstraint"/> on an exact Id
/// and an <see cref="AnyConstraint"/>.
/// </summary>
/// <param name="constraint">The constraint to get the id Hint from.</param>
/// <returns></returns>
public static string GetIdHint(Constraint constraint)
{
var andConstraint = constraint as AndConstraint;
if (andConstraint != null)
{
var left = new IdHinter(andConstraint.First);
var right = new IdHinter(andConstraint.Second);
return left.GetIdHint(right);
}
return new IdHinter(constraint).GetIdHint();
}
/// <summary>
/// Gets the id hint. Only returns an Id if <paramref name="constraint"/> is an <see cref="AttributeConstraint"/> on an exact Id or
/// if the <paramref name="constraint"/> is an <see cref="AndConstraint"/> with an <see cref="AttributeConstraint"/> on an exact Id
/// and an <see cref="AnyConstraint"/>.
/// </summary>
/// <param name="constraint">The constraint to get the id Hint from.</param>
/// <returns></returns>
public static string GetIdHint(Constraint constraint)
{
var andConstraint = constraint as AndConstraint;
if (andConstraint != null)
{
var left = new IdHinter(andConstraint.First);
var right = new IdHinter(andConstraint.Second);
return(left.GetIdHint(right));
}
return(new IdHinter(constraint).GetIdHint());
}
private static bool ShouldReturnIdHint(IdHinter of, IdHinter constraint)
{
return of.HasId && (constraint.IsAllowedConstraint & !constraint.HasId);
}
/// <summary>
/// If the constraint can only match on element with a particular id, returns the id,
/// otherwise returns null.
/// </summary>
/// <returns>The id or null if the constraint could match elements with no particular id</returns>
protected virtual string GetElementIdHint(Constraint constraint)
{
return(IdHinter.GetIdHint(constraint));
}
private static bool ShouldReturnIdHint(IdHinter of, IdHinter constraint)
{
return(of.HasId && (constraint.IsAllowedConstraint & !constraint.HasId));
}