/// <summary>
/// Initializes an instance of the stack using existing coinview.
/// </summary>
/// <param name="top">Coinview at the top of the stack.</param>
public CoinViewStack(CoinView top)
{
this.Top = top;
CoinView current = top;
while (current is IBackedCoinView)
{
current = ((IBackedCoinView)current).Inner;
}
this.Bottom = current;
}
/// <summary>
/// Enumerates coinviews in the stack ordered from the top to the bottom.
/// </summary>
/// <returns>Enumeration of coin views in the stack ordered from the top to the bottom.</returns>
public IEnumerable <CoinView> GetElements()
{
CoinView current = this.Top;
while (current is IBackedCoinView)
{
yield return(current);
current = ((IBackedCoinView)current).Inner;
}
yield return(current);
}
/// <summary>
/// Finds a coinview of specific type in the stack.
/// </summary>
/// <typeparam name="T">Type of the coinview to search for.</typeparam>
/// <returns>Coinview of the specific type from the stack or <c>null</c> if such a coinview is not in the stack.</returns>
public T Find <T>()
{
CoinView current = this.Top;
if (current is T)
{
return((T)(object)current);
}
while (current is IBackedCoinView)
{
current = ((IBackedCoinView)current).Inner;
if (current is T)
{
return((T)(object)current);
}
}
return(default(T));
}
/// <summary>
/// Initializes instance of the object based on memory based coinview.
/// </summary>
/// <param name="inner">Underlaying coinview with memory based storage.</param>
/// <param name="dateTimeProvider">Provider of time functions.</param>
/// <param name="loggerFactory">Factory to be used to create logger for the puller.</param>
/// <param name="stakeChainStore">Storage of POS block information.</param>
/// <remarks>
/// This is used for testing the coinview.
/// It allows a coin view that only has in-memory entries.
/// </remarks>
public CachedCoinView(InMemoryCoinView inner, IDateTimeProvider dateTimeProvider, ILoggerFactory loggerFactory, StakeChainStore stakeChainStore = null) :
this(dateTimeProvider, loggerFactory, stakeChainStore)
{
Guard.NotNull(inner, nameof(inner));
this.inner = inner;
}