public override Expression GetExpression(object data, JsonPath currentPath, IExpressionBuilder serializer)
{
DataTable table = (DataTable) data;
ObjectExpression tableExpr = new ObjectExpression();
tableExpr.Add("TableName", serializer.Serialize(table.TableName, currentPath.Append("TableName")));
tableExpr.Add("Columns", GetColumnsExpression(table, currentPath.Append("Columns"), serializer));
tableExpr.Add("Rows", GetRowsExpression(table, currentPath, serializer));
return tableExpr;
}
/// <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, IExpressionBuilder 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;
}
protected virtual Expression GetColumnExpression(DataColumn dc, JsonPath jsonPath, IExpressionBuilder serializer)
{
ObjectExpression column = new ObjectExpression();
// just DataType and column for now
column.Add("DataType", serializer.Serialize(dc.DataType, jsonPath.Append("DataType")));
column.Add("ColumnName", serializer.Serialize(dc.ColumnName, jsonPath.Append("ColumnName")));
return column;
}
/// <summary>
/// Generates an expression for an item and adds it to the object
/// </summary>
/// <param name="data">the item being serialized</param>
/// <param name="currentPath">the current path to the object</param>
/// <param name="serializer">serializer instance</param>
/// <param name="expression">the object expression</param>
/// <param name="prop">the property being serialized</param>
protected virtual void GenerateItemExpression(object data, JsonPath currentPath, IExpressionBuilder serializer, ObjectExpression expression, IPropertyData prop)
{
object value = prop.GetValue(data);
if (!prop.ShouldWriteValue(this.Config, value))
return;
Expression valueExpr;
if (prop.HasConverter)
{
valueExpr = serializer.Serialize(value, currentPath.Append(prop.Alias), prop.TypeConverter);
}
else
{
valueExpr = serializer.Serialize(value, currentPath.Append(prop.Alias));
}
if (value != null && !ReflectionUtils.AreEquivalentTypes(value.GetType(), prop.PropertyType))
{
valueExpr = new CastExpression(value.GetType(), valueExpr);
}
expression.Add(prop.Alias, valueExpr);
}
/// <summary>
/// Parses a javascript object
/// </summary>
/// <returns></returns>
private ObjectExpression ParseObject()
{
Token tok = ReadToken();
Debug.Assert(tok == LBraceToken);
ObjectExpression value = new ObjectExpression() { LineNumber = tok.linenumber, CharacterPosition = tok.position };
Expression item;
bool first = true;
while (ReadAhead(CommaToken, RBraceToken, new ExpressionMethod(ParseKeyValue), out item, ref first))
{
value.Add((KeyValueExpression)item);
}
return value;
}