/// <summary>
///
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
public bool Test(IEdge e)
{
if (e == null)
{
throw new ArgumentNullException("e");
}
return(m_EdgePredicate.Test(e) &&
m_VertexPredicate.Test(e.Source) &&
m_VertexPredicate.Test(e.Target)
);
}
/// <summary>
/// Moves the cursor to the next Vertex.
/// </summary>
/// <returns>True if successful, false if the iteration ended.</returns>
public bool MoveNext()
{
bool ok;
do
{
ok = m_Enumerator.MoveNext();
if (!ok)
{
return(false);
}
}while(!m_Predicate.Test(m_Enumerator.Current));
return(true);
}
/// <summary>
/// Returns the first vertex of the enumerable that matches the predicate.
/// </summary>
/// <param name="vertices">enumerable collection of <see cref="IVertex"/></param>
/// <param name="pred">vertex predicate</param>
/// <returns>first vertex if any, otherwise a null reference</returns>
public static IVertex FirstVertexIf(IVertexEnumerable vertices, IVertexPredicate pred)
{
if (vertices == null)
{
throw new ArgumentNullException("vertices");
}
if (pred == null)
{
throw new ArgumentNullException("pred");
}
IVertexEnumerator en = vertices.GetEnumerator();
while (en.MoveNext())
{
if (pred.Test(en.Current))
{
return(en.Current);
}
}
return(null);
}
/// <summary>
/// Returns the first vertex of the enumerable that matches the predicate.
/// </summary>
/// <param name="vertices">enumerable collection of <see cref="IVertex"/></param>
/// <param name="pred">vertex predicate</param>
/// <returns>first vertex if any, otherwise a null reference</returns>
public static IVertex FirstVertexIf(IVertexEnumerable vertices, IVertexPredicate pred)
{
if (vertices==null)
throw new ArgumentNullException("vertices");
if (pred==null)
throw new ArgumentNullException("pred");
IVertexEnumerator en = vertices.GetEnumerator();
while(en.MoveNext())
{
if (pred.Test(en.Current))
return en.Current;
}
return null;
}