public void Open(string filepath)
{
string[] lines =
new StreamReader(_fileSystem.OpenFileForRead(filepath)).ReadToEnd().Split(new string[] {"\r\n", "\n"}, StringSplitOptions.None);
_records = new Queue<Record>(lines.Where(line => !string.IsNullOrWhiteSpace(line)).Select(ParseRecord));
_current = null;
}
public PresidentRecordReader(Record record)
{
if (record == null) {
throw new ArgumentNullException("record");
}
if (record.Fields.Length != 9) {
throw new FormatException(
string.Format("President record must contain exactly 9 fields, but given record contains {0}.",
record.Fields.Length));
}
Presidency = ValidateAndGetNumber(record.Fields[0], "presidency");
Name = ValidateAndGetPersonFullName(record.Fields[1], "name");
Uri wikiUrl;
if (!Uri.TryCreate(record.Fields[2], UriKind.RelativeOrAbsolute, out wikiUrl)) {
throw new FormatException("Wiki link is not a valid URL.");
}
WikipediaEntryUrl = wikiUrl;
TookOffice = ValidateAndGetDateTime(record.Fields[3], "took office date");
LeftOffice = ValidateAndGetDateTime(record.Fields[4], "left office date");
Party = ValidateAndGetString(record.Fields[5], "party");
PortraitImageFilename = ValidateAndGetString(record.Fields[6], "portrait image");
ThumbnailImageFilename = ValidateAndGetString(record.Fields[7], "thumbnail image");
HomeState = ValidateAndGetString(record.Fields[8], "home state");
}
public bool MoveNext()
{
if (_records.Any()) {
_current = _records.Dequeue();
return true;
}
return false;
}
public bool ShouldPass(Record record)
{
return new PresidentRecordReader(record).HomeState.Equals(_state);
}
public bool ShouldPass(Record record)
{
return _predicate(record);
}
protected bool Equals(Record other)
{
return this.Fields.SequenceEqual(other.Fields);
}
