private static XmlElement CreateNullElement(string name, XmlValueOption option, XmlDocument xmlResult)
{
switch (option)
{
case XmlValueOption.AbsentOnNull:
return null;
case XmlValueOption.EmptyOnNull:
return xmlResult.CreateElement(name);
case XmlValueOption.NilOnNoContent:
case XmlValueOption.NilOnNull:
{
XmlElement elem = xmlResult.CreateElement(name);
elem.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
elem.SetAttribute("xsi:nil", "true");
return elem;
}
case XmlValueOption.NullOnNull:
{
XmlElement elem = xmlResult.CreateElement(name);
elem.InnerText = "NULL"; // ???????
return elem;
}
default:
throw new InvalidOperationException();
}
}
public static object XmlValueElem([Implict] Executive engine, String name, object value, XmlValueOption option)
{
QueryNode.LispProcessingContext owner = (QueryNode.LispProcessingContext)engine.Owner;
name = XmlConvert.EncodeLocalName(name);
XmlDocument xmlResult = owner.QueryContext.XmlResult;
if (value == null || value == Undefined.Value)
return CreateNullElement(name, option, xmlResult);
else if (value is XmlNodeList)
{
XmlNodeList nodeList = (XmlNodeList)value;
if (nodeList.Count == 0)
return CreateNullElement(name, option, xmlResult);
else
{
XmlElement elem = xmlResult.CreateElement(name);
foreach (XmlNode node in nodeList)
{
XmlNode child;
if (node.OwnerDocument != elem.OwnerDocument)
child = xmlResult.ImportNode(node, true);
else
child = node.CloneNode(true);
elem.AppendChild(child);
}
return elem;
}
}
else
{
XmlNode node;
if (value is XmlNode)
node = (XmlNode)value;
else
node = XmlDataAccessor.Serialize(xmlResult, value);
XmlElement elem = xmlResult.CreateElement(name);
XmlNode child;
if (node.OwnerDocument != elem.OwnerDocument)
child = xmlResult.ImportNode(node, true);
else
child = node.CloneNode(true);
elem.AppendChild(child);
return elem;
}
}
public static object XmlValueAtt([Implict] Executive engine, object node, string name, object value, XmlValueOption option)
{
XmlElement elem = (XmlElement)node;
if (value == null || value == Undefined.Value ||
(value.Equals(String.Empty) && option == XmlValueOption.NilOnNoContent))
switch (option)
{
case XmlValueOption.AbsentOnNull:
break;
case XmlValueOption.EmptyOnNull:
elem.SetAttribute(name, "");
break;
default:
throw new ESQLException(Properties.Resources.InvalidOptionForXmlAttribute, name);
}
else
elem.SetAttribute(XmlConvert.EncodeLocalName(name), XmlDataAccessor.Serialize(value));
return elem;
}
