protected virtual Expression GetExpression(IEnumerable Items, Type ItemType, JsonPath CurrentPath, ISerializerHandler serializer)
{
int index = 0;
ArrayExpression expression = new ArrayExpression();
foreach (object value in Items)
{
Expression itemExpr = serializer.Serialize(value, CurrentPath.Append(index));
if (value != null && !ReflectionUtils.AreEquivalentTypes(value.GetType(), ItemType))
{
itemExpr = new CastExpression(value.GetType(), itemExpr);
}
expression.Add(itemExpr);
index++;
}
return expression;
}
/// <summary>
/// Parses a reference to an object
/// </summary>
/// <returns></returns>
private Expression ParseReference()
{
JsonPath refID = new JsonPath();
Token tok = ReadToken();
if (tok != ReferenceStartToken && tok != OldReferenceStartToken)
throw new ParseException(string.Format("Invalid starting token for ParseReference, Expected: {0} or {1}, got: {2}", ReferenceStartToken, OldReferenceStartToken,tok));
while (PeekToken() == PeriodToken || PeekToken() == LSquareToken)
{
tok = ReadToken(); // separator "."
if (tok == PeriodToken)
tok = ReadToken(); // type part
if (tok == LSquareToken)
{
refID = refID.Append(ReadToken().value); // index
ReadToken(); // ]
}
else if (tok.type == TokenType.Identifier)
{
refID = refID.Append(tok.value);
}
else
{
throw new ParseException("Invalid Reference, must be an identifier or array value: " + tok);
}
}
return new ReferenceExpression(refID);
}
/// <summary>
/// Serialize an object implementing IDictionary. The serialized data is similar to a regular
/// object, except that the keys of the dictionary are used instead of properties.
/// </summary>
/// <param name="data">the dictionary object</param>
/// <param name="currentPath">object's path</param>
/// <param name="serializer">the serializer instance, used to serialize keys and values</param>
public override Expression GetExpression(object data, JsonPath currentPath, ISerializerHandler serializer)
{
IDictionary dictionary = (IDictionary)data;
Type itemType = typeof(object);
Type genericDictionary = null;
if ((genericDictionary = dictionary.GetType().GetInterface(typeof(IDictionary<,>).Name)) != null)
{
itemType = genericDictionary.GetGenericArguments()[1];
}
ObjectExpression expression = new ObjectExpression();
foreach (DictionaryEntry pair in dictionary)
{
//may not work in all cases
object value = pair.Value;
Expression valueExpr = serializer.Serialize(value, currentPath.Append(pair.Key.ToString()));
if (value != null && !ReflectionUtils.AreEquivalentTypes(value.GetType(), itemType))
{
valueExpr = new CastExpression(value.GetType(), valueExpr);
}
expression.Add(pair.Key.ToString(), valueExpr);
}
return expression;
}
/// <summary>
/// Creates an json object expression from object data.
/// </summary>
/// <param name="data">the data to serialize</param>
/// <param name="currentPath">current path to the object</param>
/// <param name="serializer">serializer instance used to serialize key values</param>
/// <returns>json object expression</returns>
public override Expression GetExpression(object data, JsonPath currentPath, ISerializerHandler serializer)
{
TypeData handler = Context.GetTypeHandler(data.GetType());
ObjectExpression expression = new ObjectExpression();
foreach (IPropertyData prop in handler.Properties)
{
object value = prop.GetValue(data);
Expression valueExpr;
if (prop.HasConverter)
{
valueExpr = serializer.Serialize(value, currentPath.Append(prop.Name), prop.TypeConverter);
}
else
{
valueExpr = serializer.Serialize(value, currentPath.Append(prop.Name));
}
if (value != null && !ReflectionUtils.AreEquivalentTypes(value.GetType(), prop.PropertyType))
{
valueExpr = new CastExpression(value.GetType(), valueExpr);
}
expression.Add(prop.Name, valueExpr);
}
return expression;
}
/// <summary>
/// Serializes the data into a json array expression.
/// </summary>
/// <param name="data">the data to serialize</param>
/// <param name="currentPath">the current path to the data</param>
/// <param name="serializer">serializer instance to use to serialize list items</param>
/// <returns>a json array expression representation</returns>
public override Expression GetExpression(object data, JsonPath currentPath, ISerializerHandler serializer)
{
TypeData handler = Context.GetTypeHandler(data.GetType());
CollectionHandler collectionHandler = handler.GetCollectionHandler();
Type elemType = collectionHandler.GetItemType(handler.ForType);
int index = 0;
ArrayExpression expression = new ArrayExpression();
foreach (object value in collectionHandler.GetEnumerable(data))
{
Expression itemExpr = serializer.Serialize(value, currentPath.Append(index));
if (value != null && !ReflectionUtils.AreEquivalentTypes(value.GetType(), elemType))
{
itemExpr = new CastExpression(value.GetType(), itemExpr);
}
expression.Add(itemExpr);
index++;
}
return expression;
}