/// <summary>
/// Validates that the stream contains a valid feed item.
/// </summary>
public override void Start()
{
_reader.MoveToContent();
if (!AtomHelper.IsAtomElement(_reader, FormatterConstants.AtomPubFeedElementName))
{
throw new InvalidOperationException("Not a valid ATOM feed.");
}
}
/// <summary>
/// Traverses through the feed and returns when it arrives at the necessary element.
/// </summary>
/// <returns>bool detecting whether or not there is more elements to be read.</returns>
public override bool Next()
{
// User did not read the node.
if (_currentType != ReaderItemType.BOF && !_currentNodeRead)
{
_reader.Skip();
}
do
{
_currentEntryWrapper = null;
_liveEntity = null;
if (AtomHelper.IsAtomElement(_reader, FormatterConstants.AtomPubEntryElementName) ||
AtomHelper.IsAtomTombstone(_reader, FormatterConstants.AtomDeletedEntryElementName))
{
_currentType = ReaderItemType.Entry;
_currentNodeRead = false;
return(true);
}
else if (AtomHelper.IsSyncElement(_reader, FormatterConstants.ServerBlobText))
{
_currentType = ReaderItemType.SyncBlob;
_currentNodeRead = false;
return(true);
}
else if (AtomHelper.IsSyncElement(_reader, FormatterConstants.MoreChangesAvailableText))
{
_currentType = ReaderItemType.HasMoreChanges;
_currentNodeRead = false;
return(true);
}
} while (_reader.Read());
this._currentType = ReaderItemType.EOF;
return(false);
}