private static void Initialize()
{
_patternStyle = new PatternStyle
{
TokenMatchPattern = @"\{[a-zA-Z]\w*\}",
TokenReplaceFilter = token => token.Replace("{", "").Replace("}", ""),
OutputFilter = output => (output.StartsWith("{") && output.EndsWith("}") ? output : @"\{" + output + @"\}"),
TokenFilter = tokens => "{(" + tokens + ")}"
};
}
private static string Explode(this string source, Regex pattern, PatternStyle patternStyle, Func <string, string> expansionFactory, TreeNode <string> parent)
{
var output = source;
while (output.HasChildren(pattern))
{
foreach (Match match in pattern.Matches(source))
{
var child = match.Value;
var token = patternStyle.TokenReplaceFilter(match.Value);
var thisNode = parent.Children.Add(token);
// if we have already encountered this token in this call tree, we have a circular reference
if (thisNode.CallTree.Contains(token))
{
throw new CircularReferenceException(string.Format("Circular Reference Detected for token '{0}'. Call Tree: {1}->{2}",
token,
string.Join("->", thisNode.CallTree.ToArray().Reverse()),
token));
}
// expand this match
var expandedValue = expansionFactory(token);
// Replace the match with the expanded value
child = Regex.Replace(child, patternStyle.OutputFilter(match.Value), expandedValue);
// Recursively expand the child until we no longer encounter nested tokens (or hit a circular reference)
child = child.Explode(pattern, patternStyle, expansionFactory, thisNode);
// finally, replace the match in the output with the fully-expanded value
output = Regex.Replace(output, patternStyle.OutputFilter(match.Value), child);
}
}
return(output);
}
private static string Explode(this string source, Regex pattern, PatternStyle patternStyle, Func<string, string> expansionFactory, TreeNode<string> parent)
{
var output = source;
while (output.HasChildren(pattern))
{
foreach (Match match in pattern.Matches(source))
{
var child = match.Value;
var token = patternStyle.TokenReplaceFilter(match.Value);
var thisNode = parent.Children.Add(token);
// if we have already encountered this token in this call tree, we have a circular reference
if (thisNode.CallTree.Contains(token))
throw new CircularReferenceException(string.Format("Circular Reference Detected for token '{0}'. Call Tree: {1}->{2}",
token,
string.Join("->", thisNode.CallTree.ToArray().Reverse()), token));
// expand this match
var expandedValue = expansionFactory(token);
// Replace the match with the expanded value
child = Regex.Replace(child, patternStyle.OutputFilter(match.Value), expandedValue);
// Recursively expand the child until we no longer encounter nested tokens (or hit a circular reference)
child = child.Explode(pattern, patternStyle, expansionFactory, thisNode);
// finally, replace the match in the output with the fully-expanded value
output = Regex.Replace(output, patternStyle.OutputFilter(match.Value), child);
}
}
return output;
}
private static void Initialize()
{
_patternStyle = new PatternStyle
{
TokenMatchPattern = @"\{[a-zA-Z]\w*\}",
TokenReplaceFilter = token => token.Replace("{", "").Replace("}", ""),
OutputFilter = output => (output.StartsWith("{") && output.EndsWith("}") ? output : @"\{" + output + @"\}"),
TokenFilter = tokens => "{(" + tokens + ")}"
};
}
