protected override T ReadPropertyInternal <T>(PlyProperty expected)
{
var token = _textReader.ReadToken();
var parsedValue = PlyTypeConverter.ParseStringToNativeType <T>(token, expected.ValueType);
return(parsedValue);
}
public static UnexpectedDataTypeException GetUnexpectedDataTypeException(PlyProperty expected, Type actual)
{
var expectedType = PlyTypeConverter.ToStringRepresentation(expected.ValueType);
var exceptionMessage = $@"Unexpected data type. Was expecting {expectedType}
for property {expected.Name}, but got {actual.Name} instead.";
return(new UnexpectedDataTypeException(exceptionMessage, expected));
}
public T ReadProperty <T>()
{
PlyProperty expected = _iterator.CurrentProperty;
if (expected is PlyArrayProperty)
{
throw ExceptionFactory.GetTryingToReadValueWhenArrayExpectedException(expected);
}
_iterator.MoveNext();
return(ReadPropertyInternal <T>(expected));
}
public IEnumerable <T> ReadArray <T>()
{
PlyProperty expected = _iterator.CurrentProperty;
if (!(expected is PlyArrayProperty))
{
throw ExceptionFactory.GetTryingToReadArrayWhenValueExpectedException(expected);
}
_iterator.MoveNext();
return(ReadArrayInternal <T>((PlyArrayProperty)expected));
}
public void SkipProperty(int count = 1)
{
for (var i = 0; i < count; ++i)
{
PlyProperty expected = _iterator.CurrentProperty;
if (expected is PlyArrayProperty)
{
SkipPropertyInternal((PlyArrayProperty)expected);
}
else
{
SkipPropertyInternal(expected);
}
_iterator.MoveNext();
}
}
private void AddProperty(PlyFile plyFile, string[] tokens)
{
PlyProperty property;
if (tokens[1] == PlyKeywords.List)
{
var name = tokens[4];
var element = plyFile.Elements.Last();
property = new PlyProperty(name, element.Properties.Count, TypeMapper.GetPropertyType(tokens[3]), TypeMapper.GetPropertyType(tokens[2]));
element.Properties.Add(tokens[4], property);
}
else
{
var element = plyFile.Elements.Last();
property = new PlyProperty(tokens[2], element.Properties.Count, TypeMapper.GetPropertyType(tokens[1]));
element.Properties.Add(tokens[2], property);
}
}
protected override void SkipPropertyInternal(PlyProperty expected)
{
ReadPropertyInternal <object>(expected);
}
public static InvalidOperationException GetCannotDisposeBecauseIterationIsNotDoneException(PlyProperty expected, PlyWriter writer)
{
return(new InvalidOperationException($@"Not all defined elements have been written.
The {writer.GetType().Name} is now in a invalid state. Last property expected was {expected.Name}."));
}
protected abstract void SkipPropertyInternal(PlyProperty expected);
protected override T ReadPropertyInternal <T>(PlyProperty expected)
{
var value = ReadBytesFor(expected.ValueType);
return(PlyTypeConverter.ParseBytesToNative <T>(value, expected.ValueType));
}
/// <summary>
/// Reads and validates the header lines of a ply file.
/// </summary>
/// <param name="headerLines">The lines to read.</param>
/// <returns></returns>
private PlyHeader ReadHeader(string[] headerLines)
{
if (headerLines.Length > 2 && (PlyHeaderItems)Enum.Parse(typeof(PlyHeaderItems), headerLines[0]) == PlyHeaderItems.ply &&
(PlyHeaderItems)Enum.Parse(typeof(PlyHeaderItems), headerLines[headerLines.Length - 1]) == PlyHeaderItems.end_header)
{
var formatSpecLineParts = headerLines[1].Split(' ');
var formatStr = formatSpecLineParts[0];
var formatTypeStr = formatSpecLineParts[1];
var fileVersion = Version.Parse(formatSpecLineParts[2]);
if ((PlyHeaderItems)Enum.Parse(typeof(PlyHeaderItems), formatStr) == PlyHeaderItems.format &&
Enum.TryParse(formatTypeStr, out PlyFormatTypes formatType) && fileVersion <= SUPPORTEDVERSION)
{
var comments = new List <string>();
var objInfos = new List <Tuple <string, string> >();
var elements = new List <PlyElement>();
for (int i = 2; i < headerLines.Length - 1; i++)
{
var lineParts = headerLines[i].Split(' ');
if (Enum.TryParse(lineParts[0], out PlyHeaderItems headerItemType))
{
switch (headerItemType)
{
case PlyHeaderItems.element:
{
if (lineParts.Length == 3)
{
var elementName = lineParts[1];
var elementCount = int.Parse(lineParts[2]);
var element = new PlyElement(elementName, elementCount, new List <PlyProperty[]> {
new PlyProperty[] { }
});
elements.Add(element);
}
break;
}
case PlyHeaderItems.property:
{
if (lineParts.Length >= 3 && elements.Count > 0)
{
if (lineParts[1] != "list" && lineParts.Length == 3)
{
if (Enum.TryParse($"_{lineParts[1]}", out PlyDataTypes propertyType))
{
var propertyName = lineParts[2];
var property = new PlyProperty(propertyName, propertyType, null, false, PlyDataTypes._char, null);
var newPropertyList = new List <PlyProperty>();
for (int j = 0; j < elements.Last().Instances[0].Length; j++)
{
newPropertyList.Add(elements.Last().Instances[0][j]);
}
newPropertyList.Add(property);
elements.Last().Instances[0] = newPropertyList.ToArray();
}
else
{
throw new InvalidDataException($"Invalid data type, {lineParts[1]}.");
}
}
else if (lineParts[1] == "list" && lineParts.Length == 5)
{
//array property
if (Enum.TryParse($"_{lineParts[2]}", out PlyDataTypes propertyType) && Enum.TryParse($"_{lineParts[3]}", out PlyDataTypes listContentType))
{
var propertyName = lineParts[4];
var property = new PlyProperty(propertyName, propertyType, null, true, listContentType, null);
var newPropertyList = new List <PlyProperty>();
for (int j = 0; j < elements.Last().Instances[0].Length; j++)
{
newPropertyList.Add(elements.Last().Instances[0][j]);
}
newPropertyList.Add(property);
elements.Last().Instances[0] = newPropertyList.ToArray();
}
else
{
throw new InvalidDataException($"Invalid data type, {lineParts[1]}.");
}
}
else
{
throw new InvalidDataException("Invalid property definition.");
}
}
break;
}
case PlyHeaderItems.obj_info:
{
if (lineParts.Length == 3)
{
objInfos.Add(new Tuple <string, string>(lineParts[1], lineParts[2]));
}
else
{
objInfos.Add(new Tuple <string, string>($"htk_info_{objInfos.Count}", headerLines[i].Substring(lineParts[0].Length + 1)));
}
break;
}
case PlyHeaderItems.comment:
{
comments.Add(headerLines[i].Substring(lineParts[0].Length + 1));
break;
}
default:
{
throw new InvalidDataException($"Unknown header item, {lineParts[0]}.");
}
}
}
else
{
throw new InvalidDataException($"Unknown header item, {lineParts[0]}.");
}
}
var plyHeader = new PlyHeader(formatType, fileVersion, elements.ToArray(), objInfos.ToArray(), comments.ToArray());
return(plyHeader);
}
else
{
throw new InvalidDataException("Invalid format specification.");
}
}
protected abstract T ReadPropertyInternal <T>(PlyProperty expected);
public static UnexpectedDataTypeException GetTryingToReadValueWhenArrayExpectedException(PlyProperty expected)
{
return(new UnexpectedDataTypeException("Trying to read a value when array is expected.", expected));
}
public static UnexpectedDataTypeException GetTryingToReadArrayWhenValueExpectedException(PlyProperty expected)
{
return(new UnexpectedDataTypeException("Trying to read an array when value is expected.", expected));
}
protected override void SkipPropertyInternal(PlyProperty expected)
{
_textReader.ReadToken();
}
public static UnexpectedDataTypeException GetGotValueWhenArrayExpectedException(PlyProperty expected)
{
return(new UnexpectedDataTypeException(
$"Got an value but was expecting an array for property {expected.Name}."));
}
public static UnexpectedDataTypeException GetGotArrayWhenValueExpectedException(PlyProperty expected)
{
return(new UnexpectedDataTypeException(
$"Got an array but was expecting single value for property {expected.Name}."));
}