private static void ReadRegisterTransform(XmlNode node, RewriterConfiguration config)
{
// Type attribute.
XmlNode typeNode = node.Attributes[Constants.AttrTransform];
if (typeNode == null)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.AttributeRequired, Constants.AttrTransform), node);
}
if (node.ChildNodes.Count > 0)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.ElementNoElements, Constants.ElementRegister), node);
}
// Transform type specified. Create an instance and add it
// as the mapper handler for this map.
IRewriteTransform handler = TypeHelper.Activate(typeNode.Value, null) as IRewriteTransform;
if (handler != null)
{
config.TransformFactory.AddTransform(handler);
}
else
{
// TODO: Error due to type.
}
}
/// <summary>
/// Adds a transform.
/// </summary>
/// <param name="transform">The transform object.</param>
public void AddTransform(IRewriteTransform transform)
{
if (transform == null)
{
throw new ArgumentNullException("transform");
}
_transforms.Add(transform.Name, transform);
}
/*
* /// <summary>
* /// Adds a transform.
* /// </summary>
* /// <param name="transformType">The type of the transform.</param>
* public void AddTransform(string transformType)
* {
* AddTransform((IRewriteTransform)TypeHelper.Activate(transformType, null));
* }
*/
/// <summary>
/// Adds a transform.
/// </summary>
/// <param name="transform">The transform object.</param>
public void Add(IRewriteTransform transform)
{
if (transform == null)
{
throw new ArgumentNullException("transform");
}
_transforms.Add(transform.Name, transform);
}
private static void ReadRegisterTransform(XmlNode node, RewriterConfiguration config)
{
if (node.ChildNodes.Count > 0)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.ElementNoElements, Constants.ElementRegister), node);
}
string type = node.GetRequiredAttribute(Constants.AttrTransform);
// Transform type specified.
// Create an instance and add it as the mapper handler for this map.
IRewriteTransform transform = TypeHelper.Activate(type, null) as IRewriteTransform;
if (transform == null)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.InvalidTypeSpecified, type, typeof(IRewriteTransform)), node);
}
config.TransformFactory.AddTransform(transform);
}
private string Reduce(RewriteContext context, StringReader reader)
{
string result;
char ch = (char)reader.Read();
if (char.IsDigit(ch))
{
string num = ch.ToString();
if (char.IsDigit((char)reader.Peek()))
{
ch = (char)reader.Read();
num += ch.ToString();
}
if (context.LastMatch != null)
{
Group group = context.LastMatch.Groups[Convert.ToInt32(num)];
result = @group != null ? @group.Value : string.Empty;
}
else
{
result = string.Empty;
}
}
else
{
switch (ch)
{
case '<':
{
string expr;
using (StringWriter writer = new StringWriter())
{
ch = (char)reader.Read();
while (ch != '>' && ch != (char)65535)
{
if (ch == '$')
{
writer.Write(this.Reduce(context, reader));
}
else
{
writer.Write(ch);
}
ch = (char)reader.Read();
}
expr = writer.GetStringBuilder().ToString();
}
if (context.LastMatch != null)
{
Group group = context.LastMatch.Groups[expr];
if (@group != null)
{
result = @group.Value;
}
else
{
result = string.Empty;
}
}
else
{
result = string.Empty;
}
}
break;
case '{':
{
string expr;
bool isMap = false;
bool isFunction = false;
using (StringWriter writer = new StringWriter())
{
ch = (char)reader.Read();
while (ch != '}' && ch != (char)65535)
{
if (ch == '$')
{
writer.Write(this.Reduce(context, reader));
}
else
{
if (ch == ':')
{
isMap = true;
}
else if (ch == '(')
{
isFunction = true;
}
writer.Write(ch);
}
ch = (char)reader.Read();
}
expr = writer.GetStringBuilder().ToString();
}
if (isMap)
{
Match match = Regex.Match(expr, @"^([^\:]+)\:([^\|]+)(\|(.+))?$");
string mapName = match.Groups[1].Value;
string mapArgument = match.Groups[2].Value;
string mapDefault = match.Groups[4].Value;
result =
this._configuration.TransformFactory.GetTransform(mapName).ApplyTransform(
mapArgument) ?? mapDefault;
}
else if (isFunction)
{
Match match = Regex.Match(expr, @"^([^\(]+)\((.+)\)$");
string functionName = match.Groups[1].Value;
string functionArgument = match.Groups[2].Value;
IRewriteTransform tx = this._configuration.TransformFactory.GetTransform(functionName);
result = tx != null?tx.ApplyTransform(functionArgument) : expr;
}
else
{
result = context.Properties[expr];
}
}
break;
default:
result = ch.ToString();
break;
}
}
return(result);
}
private string Reduce(IRewriteContext context, StringReader reader)
{
string result;
char ch = (char)reader.Read();
if (Char.IsDigit(ch))
{
string num = ch.ToString();
if (Char.IsDigit((char)reader.Peek()))
{
ch = (char)reader.Read();
num += ch.ToString();
}
if (context.LastMatch != null)
{
Group group = context.LastMatch.Groups[Convert.ToInt32(num)];
result = (group == null) ? String.Empty : group.Value;
}
else
{
result = String.Empty;
}
}
else if (ch == '<')
{
string expr;
using (StringWriter writer = new StringWriter())
{
ch = (char)reader.Read();
while (ch != '>' && ch != EndChar)
{
if (ch == '$')
{
writer.Write(Reduce(context, reader));
}
else
{
writer.Write(ch);
}
ch = (char)reader.Read();
}
expr = writer.GetStringBuilder().ToString();
}
if (context.LastMatch != null)
{
Group group = context.LastMatch.Groups[expr];
result = (group == null) ? String.Empty : group.Value;
}
else
{
result = String.Empty;
}
}
else if (ch == '{')
{
string expr;
bool isMap = false;
bool isFunction = false;
using (StringWriter writer = new StringWriter())
{
ch = (char)reader.Read();
while (ch != '}' && ch != EndChar)
{
if (ch == '$')
{
writer.Write(Reduce(context, reader));
}
else
{
if (ch == ':')
{
isMap = true;
}
else if (ch == '(')
{
isFunction = true;
}
writer.Write(ch);
}
ch = (char)reader.Read();
}
expr = writer.GetStringBuilder().ToString();
}
if (isMap)
{
Match match = Regex.Match(expr, @"^([^\:]+)\:([^\|]+)(\|(.+))?$");
string mapName = match.Groups[1].Value;
string mapArgument = match.Groups[2].Value;
string mapDefault = match.Groups[4].Value;
IRewriteTransform tx = _configuration.TransformFactory.GetTransform(mapName);
if (tx == null)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.MappingNotFound, mapName));
}
result = tx.ApplyTransform(mapArgument) ?? mapDefault;
}
else if (isFunction)
{
Match match = Regex.Match(expr, @"^([^\(]+)\((.+)\)$");
string functionName = match.Groups[1].Value;
string functionArgument = match.Groups[2].Value;
IRewriteTransform tx = _configuration.TransformFactory.GetTransform(functionName);
if (tx == null)
{
throw new ConfigurationErrorsException(MessageProvider.FormatString(Message.TransformFunctionNotFound, functionName));
}
result = tx.ApplyTransform(functionArgument);
}
else
{
result = context.Properties[expr];
}
}
else
{
result = ch.ToString();
}
return(result);
}
