/// <summary>
/// Look up the specified identity and return the object to which it
/// refers.
/// </summary>
/// <param name="id">
/// The identity.
/// </param>
/// <returns>
/// The object registered under that identity.
/// </returns>
/// <exception cref="IOException">
/// If the requested identity is not registered.
/// </exception>
protected internal IPofValue LookupIdentity(int id)
{
ILongArray map = EnsureReferenceRegistry();
if (!map.Exists(id))
{
throw new IOException("missing identity: " + id);
}
return((IPofValue)map[id]);
}
/// <summary>
/// Return index of the last parsed child with an index lower than the
/// specified one.
/// </summary>
/// <param name="nIndex">
/// Index to find the preceding child index for.
/// </param>
/// <returns>
/// Index of the last parsed child, or -1 if one does not exist.
/// </returns>
protected int GetLastChildIndex(int nIndex)
{
ILongArray aChildren = m_aChildren;
int nLast = (int)aChildren.LastIndex;
if (nIndex < nLast)
{
nLast = nIndex;
while (nLast >= 0 && !aChildren.Exists(nLast))
{
nLast--;
}
}
return(nLast);
}