protected virtual Expression GetColumnsExpression(DataTable table, JsonPath currentPath, IExpressionBuilder serializer)
{
ArrayExpression columns = new ArrayExpression();
int colCount = 0;
foreach (DataColumn dc in table.Columns)
{
columns.Add(GetColumnExpression(dc, currentPath.Append(colCount), serializer));
colCount++;
}
return columns;
}
/// <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, IExpressionBuilder serializer)
{
TypeData handler = Config.GetTypeHandler(data.GetType());
CollectionHandler collectionHandler = handler.CollectionHandler;
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;
}
protected virtual Expression GetRowsExpression(DataTable table, JsonPath currentPath, IExpressionBuilder serializer)
{
ArrayExpression rowsExpr = new ArrayExpression();
for (int i = 0; i < table.Rows.Count; i++)
{
DataRow row = table.Rows[i];
object[] values = row.ItemArray;
JsonPath rowPath = currentPath.Append(i);
ArrayExpression rowExpr = new ArrayExpression();
for (int j = 0; j < values.Length; j++)
{
rowExpr.Add(serializer.Serialize(values[j], rowPath.Append(j)));
}
rowsExpr.Add(rowExpr);
}
return rowsExpr;
}
/// <summary>
/// Parses a javascript array
/// </summary>
/// <returns></returns>
private ArrayExpression ParseCollection()
{
Token tok = ReadToken();
Debug.Assert(tok == LSquareToken);
ArrayExpression value = new ArrayExpression() { LineNumber = tok.linenumber, CharacterPosition = tok.position };
Expression item;
bool first = true;
while (ReadAhead(CommaToken, RSquareToken, new ExpressionMethod(ParseExpression), out item, ref first))
{
value.Add(item);
}
return value;
}
