public Prison Load(Stream stream)
{
var reader = new StreamReader(stream, Encoding.ASCII);
var nodes = new Stack <Node>();
Node currentNode = new Prison();
int lineNum = 0;
string line;
while ((line = reader.ReadLine()) != null)
{
lineNum++;
Tokenize(line);
// skip blank lines
if (tokens.Count == 0)
{
continue;
}
// start a new node
if ("BEGIN".Equals(tokens[0]))
{
nodes.Push(currentNode);
string label = tokens[1];
currentNode = currentNode.CreateNode(label);
if (tokens.Count > 2)
{
// inline node
if (tokens.Count % 2 != 1)
{
throw new FormatException(
"Unexpected number of tokens in an inline node definition on line " + lineNum);
}
if (!"END".Equals(tokens[tokens.Count - 1]))
{
throw new FormatException("Unexpected end of inline node definition on line " + lineNum);
}
for (int i = 2; i < tokens.Count - 1; i += 2)
{
string key = tokens[i];
string value = tokens[i + 1];
currentNode.ReadKey(key, value);
}
Node upperNode = nodes.Pop();
upperNode.FinishedReadingNode(currentNode);
currentNode = upperNode;
}
else
{
currentNode.DoNotInline = true;
}
}
else if ("END".Equals(tokens[0]))
{
// end of multi-line section
Node upperNode = nodes.Pop();
upperNode.FinishedReadingNode(currentNode);
currentNode = upperNode;
}
else
{
// inside a multi-line section
string key = tokens[0];
string value = tokens[1];
currentNode.ReadKey(key, value);
}
}
if (nodes.Count != 0)
{
throw new FormatException("Unexpected end of file!");
}
return((Prison)currentNode);
}
