/// <summary>
/// Moves to the next object.
/// </summary>
/// <returns></returns>
public bool MoveNext()
{
_currentFeatureIndex++;
if (_currentFeatures != null &&
_currentFeatureIndex < _currentFeatures.Count)
{ // moved to the next object in the current features list.
return(true);
}
while (true)
{
if (!_source.MoveNext())
{
return(false);
}
var next = _source.Current();
var nextFeatures = _interpreter.Interpret(next);
_currentFeatures = new List <IFeature>(nextFeatures.Features);
_currentFeatureIndex = 0;
if (_currentFeatures.Count > 0)
{
return(true);
}
}
}
/// <summary>
/// Moves to the next feature.
/// </summary>
/// <returns></returns>
public bool MoveNext()
{
if (_currentEnumerator != null &&
_currentEnumerator.MoveNext())
{ // there is still a current enumerator.
_current = _currentEnumerator.Current;
return(true);
}
_currentEnumerator = null;
while (_source.MoveNext())
{
var features = _interpreter.Interpret(_source.Current());
if (features != null)
{ // an object was succesfully converted.
_currentEnumerator = features.GetEnumerator();
if (_currentEnumerator.MoveNext())
{ // move to first object in feature collection.
_current = _currentEnumerator.Current;
return(true);
}
else
{ // an empty feature collection, try next one.
_currentEnumerator.Dispose();
_currentEnumerator = null;
}
}
}
return(false);
}