/// <summary>
/// Deserialize LocalDate from readable int in ISO yyyymmdd format.
///
/// Null value is handled via [BsonIgnoreIfNull] attribute and is not expected here.
/// </summary>
public override LocalDate Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
{
// LocalDate is serialized as readable int in ISO yyyymmdd format
int isoDate = context.Reader.ReadInt32();
// Create LocalDate object by parsing readable int
var result = LocalDateUtil.FromIsoInt(isoDate);
return(result);
}
//--- PRIVATE
/// <summary>
/// Populate key elements from an array of tokens starting
/// at the specified token index. Elements that are themselves
/// keys may use more than one token.
///
/// This method returns the index of the first unused token.
/// The returned value is the same as the length of the tokens
/// array if all tokens are used.
///
/// If key AKey has two elements, B and C, where
///
/// * B has type BKey which has two string elements, and
/// * C has type string,
///
/// the semicolon delimited key has the following format:
///
/// BToken1;BToken2;CToken
///
/// To avoid serialization format uncertainty, key elements
/// can have any atomic type except Double.
/// </summary>
private int PopulateFrom(string[] tokens, int tokenIndex)
{
// Get key elements using reflection
var elementInfoArray = DataTypeInfo.GetOrCreate(this).DataElements;
// If singleton is detected process it separately, then exit
if (elementInfoArray.Length == 0)
{
// Check that string key is empty
if (tokens.Length != 1 || tokens[0] != String.Empty)
{
throw new Exception($"Type {GetType()} has key {string.Join(";", tokens)} while " +
$"for a singleton the key must be an empty string (String.Empty). " +
$"Singleton key is a key that has no key elements.");
}
// Return the length of empty key which consists of one (empty) token
return(1);
}
// Check that there are enough remaining tokens in the key for each key element
if (tokens.Length - tokenIndex < elementInfoArray.Length)
{
throw new Exception(
$"Key of type {GetType().Name} requires at least {elementInfoArray.Length} elements " +
$"{String.Join(";", elementInfoArray.Select(p => p.Name).ToArray())} while there are " +
$"only {tokens.Length - tokenIndex} remaining key tokens: {string.Join(";", tokens)}.");
}
// Iterate over element info elements, advancing tokenIndex by the required
// number of tokens for each element. In case of embedded keys, the value of
// tokenIndex is advanced by the recursive call to InitFromTokens method
// of the embedded key.
foreach (var elementInfo in elementInfoArray)
{
// Get element type
Type elementType = elementInfo.PropertyType;
// Convert string token to value depending on elementType
if (elementType == typeof(string))
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
elementInfo.SetValue(this, token);
}
else if (elementType == typeof(double) || elementType == typeof(double?))
{
throw new Exception(
$"Key element {elementInfo.Name} has type Double. Elements of this type " +
$"cannot be part of key due to serialization format uncertainty.");
}
else if (elementType == typeof(bool) || elementType == typeof(bool?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
bool tokenValue = bool.Parse(token);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(int) || elementType == typeof(int?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
int tokenValue = int.Parse(token);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(long) || elementType == typeof(long?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
long tokenValue = long.Parse(token);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(LocalDate) || elementType == typeof(LocalDate?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
// Inside the key, LocalDate is represented as readable int in
// non-delimited yyyymmdd format, not as delimited ISO string.
//
// First parse the string to int, then convert int to LocalDate.
string token = tokens[tokenIndex++];
if (!Int32.TryParse(token, out int isoInt))
{
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type LocalDate and value {token} " +
$"that cannot be converted to readable int in non-delimited yyyymmdd format.");
}
LocalDate tokenValue = LocalDateUtil.FromIsoInt(isoInt);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(LocalTime) || elementType == typeof(LocalTime?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
// Inside the key, LocalTime is represented as readable int in
// non-delimited hhmmssfff format, not as delimited ISO string.
//
// First parse the string to int, then convert int to LocalTime.
string token = tokens[tokenIndex++];
if (!Int32.TryParse(token, out int isoInt))
{
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type LocalTime and value {token} " +
$"that cannot be converted to readable int in non-delimited hhmmssfff format.");
}
LocalTime tokenValue = LocalTimeUtil.FromIsoInt(isoInt);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(LocalMinute) || elementType == typeof(LocalMinute?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
// Inside the key, LocalMinute is represented as readable int in
// non-delimited hhmm format, not as delimited ISO string.
//
// First parse the string to int, then convert int to LocalTime.
string token = tokens[tokenIndex++];
if (!Int32.TryParse(token, out int isoInt))
{
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type LocalMinute and value {token} " +
$"that cannot be converted to readable int in non-delimited hhmm format.");
}
LocalMinute tokenValue = LocalMinuteUtil.FromIsoInt(isoInt);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(LocalDateTime) || elementType == typeof(LocalDateTime?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
// Inside the key, LocalDateTime is represented as readable long in
// non-delimited yyyymmddhhmmssfff format, not as delimited ISO string.
//
// First parse the string to long, then convert int to LocalDateTime.
string token = tokens[tokenIndex++];
if (!Int64.TryParse(token, out long isoLong))
{
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type LocalDateTime and value {token} " +
$"that cannot be converted to readable long in non-delimited yyyymmddhhmmssfff format.");
}
LocalDateTime tokenValue = LocalDateTimeUtil.FromIsoLong(isoLong);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(Instant) || elementType == typeof(Instant?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
// Inside the key, Instant is represented as readable long in
// non-delimited yyyymmddhhmmssfff format, not as delimited ISO string.
//
// First parse the string to long, then convert int to Instant.
string token = tokens[tokenIndex++];
if (!Int64.TryParse(token, out long isoLong))
{
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type Instant and value {token} " +
$"that cannot be converted to readable long in non-delimited yyyymmddhhmmssfff format.");
}
Instant tokenValue = InstantUtil.FromIsoLong(isoLong);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType == typeof(TemporalId) || elementType == typeof(TemporalId?))
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
TemporalId tokenValue = TemporalId.Parse(token);
elementInfo.SetValue(this, tokenValue);
}
else if (elementType.BaseType == typeof(Enum)) // TODO Support nullable Enum in key
{
CheckTokenNotEmpty(tokens, tokenIndex);
string token = tokens[tokenIndex++];
object tokenValue = Enum.Parse(elementType, token);
elementInfo.SetValue(this, tokenValue);
}
else if (typeof(Key).IsAssignableFrom(elementType))
{
Key keyElement = (Key)Activator.CreateInstance(elementType);
tokenIndex = keyElement.PopulateFrom(tokens, tokenIndex);
elementInfo.SetValue(this, keyElement);
}
else
{
// Field type is unsupported for a key, error message
throw new Exception(
$"Element {elementInfo.Name} of key type {GetType().Name} has type {elementType} that " +
$"is not one of the supported key element types. Available key element types are " +
$"string, bool, int, long, LocalDate, LocalTime, LocalMinute, LocalDateTime, Instant, Enum, or Key.");
}
}
return(tokenIndex);
}
/// <summary>
/// Write atomic value. Value type
/// will be inferred from object.GetType().
/// </summary>
public void WriteValue(object value)
{
// Check state transition matrix
if (currentState_ == TreeWriterState.ValueStarted)
{
currentState_ = TreeWriterState.ValueWritten;
}
else if (currentState_ == TreeWriterState.ValueArrayItemStarted)
{
currentState_ = TreeWriterState.ValueArrayItemWritten;
}
else
{
throw new Exception(
$"A call to WriteEndValue(...) does not follow a matching WriteValue(...) at the same indent level.");
}
// Check that we are either inside dictionary or array
Type elementType = null;
if (currentArray_ != null)
{
elementType = currentArrayItemType_;
}
else if (currentDict_ != null)
{
elementType = currentElementInfo_.PropertyType;
}
else
{
throw new Exception($"Cannot WriteValue(...)for element {currentElementName_} " +
$"is called outside dictionary or array.");
}
if (value.IsEmpty())
{
// Do not record null or empty value into dictionary, but add it to an array
// Add to dictionary or array, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = null;
}
return;
}
// Write based on element type
Type valueType = value.GetType();
if (elementType == typeof(string) ||
elementType == typeof(double) || elementType == typeof(double?) ||
elementType == typeof(bool) || elementType == typeof(bool?) ||
elementType == typeof(int) || elementType == typeof(int?) ||
elementType == typeof(long) || elementType == typeof(long?))
{
// Check type match
if (!elementType.IsAssignableFrom(valueType))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into element of type {elementType.Name}.");
}
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = value;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, value);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType == typeof(LocalDate) || elementType == typeof(LocalDate?))
{
// Check type match
if (valueType != typeof(int))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into LocalDate; type should be int32.");
}
// Deserialize LocalDate as ISO int in yyyymmdd format
LocalDate dateValue = LocalDateUtil.FromIsoInt((int)value);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = dateValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, dateValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType == typeof(LocalTime) || elementType == typeof(LocalTime?))
{
// Check type match
if (valueType != typeof(int))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into LocalTime; type should be int32.");
}
// Deserialize LocalTime as ISO int in hhmmssfff format
LocalTime timeValue = LocalTimeUtil.FromIsoInt((int)value);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = timeValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, timeValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType == typeof(LocalMinute) || elementType == typeof(LocalMinute?))
{
// Check type match
if (valueType != typeof(int))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into LocalMinute; type should be int32.");
}
// Deserialize LocalTime as ISO int in hhmmssfff format
LocalMinute minuteValue = LocalMinuteUtil.FromIsoInt((int)value);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = minuteValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, minuteValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType == typeof(LocalDateTime) || elementType == typeof(LocalDateTime?))
{
// Check type match
if (valueType != typeof(long))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into LocalDateTime; type should be int64.");
}
// Deserialize LocalDateTime as ISO long in yyyymmddhhmmssfff format
LocalDateTime dateTimeValue = LocalDateTimeUtil.FromIsoLong((long)value);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = dateTimeValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, dateTimeValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType == typeof(Instant) || elementType == typeof(Instant?))
{
// Check type match
if (valueType != typeof(long))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into Instant; type should be int64.");
}
// Deserialize Instant as ISO long in yyyymmddhhmmssfff format
Instant instantValue = InstantUtil.FromIsoLong((long)value);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = instantValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, instantValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else if (elementType.IsEnum)
{
// Check type match
if (valueType != typeof(string))
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into enum {elementType.Name}; type should be string.");
}
string stringValue = (string)value;
// Deserialize enum as string
string enumString = (string)value;
object enumValue = Enum.Parse(elementType, enumString);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = enumValue;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, enumValue);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else
{
// We run out of value types at this point, now we can create
// a reference type and check that it implements Key
object keyObj = (Key)Activator.CreateInstance(elementType);
if (keyObj is Key)
{
Key key = (Key)keyObj;
// Check type match
if (valueType != typeof(string) && valueType != elementType)
{
throw new Exception(
$"Attempting to deserialize value of type {valueType.Name} " +
$"into key type {elementType.Name}; keys should be serialized into semicolon delimited string.");
}
// Populate by parsing semicolon delimited string
string stringValue = value.AsString();
key.PopulateFrom(stringValue);
// Add to array or dictionary, depending on what we are inside of
if (currentArray_ != null)
{
currentArray_[currentArray_.Count - 1] = key;
}
else if (currentDict_ != null)
{
currentElementInfo_.SetValue(currentDict_, key);
}
else
{
throw new Exception($"Value can only be added to a dictionary or array.");
}
}
else
{
// Argument type is unsupported, error message
throw new Exception($"Element type {value.GetType()} is not supported for serialization.");
}
}
}