public DynamicTopic DynamicTopicFor(string topic)
{
if (_Topics == null)
_Topics = new Hashtable();
DynamicTopic answer = (DynamicTopic)(_Topics[topic]);
if (answer != null)
return answer;
RelativeTopicName rel = new RelativeTopicName(topic);
ArrayList alternatives = new ArrayList();
if (rel.Namespace != null) // if they left the namespace unspec'd
{
alternatives.Add(new AbsoluteTopicName(topic));
}
else
{
alternatives.Add(new AbsoluteTopicName(topic, Name)); // always try this one first
alternatives.AddRange(rel.AllAbsoluteTopicNamesFor(CurrentFederation.ContentBaseForNamespace(Name)));
}
foreach (AbsoluteTopicName tn in alternatives)
{
ContentBase cb = CurrentFederation.ContentBaseForTopic(tn);
if (!cb.TopicExists(tn))
continue;
answer = new DynamicTopic(CurrentFederation, tn);
_Topics[topic] = answer;
return answer;
}
return null;
}
/// <summary>
/// Answer a hash: keys are topic; values are an array of topic names for referenced topics (in this content base)
/// </summary>
/// <param name="filterToTopic">Specific topic for which reference information is desired (null gets info for all topics)</param>
/// <param name="existingOnly">Specific whether to only return the referenced topics that actually exist</param>
/// <returns></returns>
public Hashtable AllReferencesByTopic(AbsoluteTopicName filterToTopic, bool existingOnly)
{
Hashtable relativesToRefs = new Hashtable();
Hashtable answer = new Hashtable();
IEnumerable topicList;
if (filterToTopic == null)
topicList = AllTopics(false);
else
{
ArrayList list = new ArrayList();
list.Add(filterToTopic);
topicList = list;
}
foreach (AbsoluteTopicName topic in topicList)
{
string current = Federation.Read(topic);
MatchCollection wikiNames = Formatter.extractWikiNames.Matches(current);
ArrayList processed = new ArrayList();
ArrayList allReferencedTopicsFromTopic = new ArrayList();
foreach (Match m in wikiNames)
{
string each = m.Groups["topic"].ToString();
if (processed.Contains(each))
{
continue; // skip dup
}
processed.Add(each);
RelativeTopicName relName = new RelativeTopicName(TopicName.StripEscapes(each));
// Now either calculate the full list of referenced names and cache it or get it from the cache
ArrayList absoluteNames = (ArrayList)(relativesToRefs[relName]);
if (absoluteNames == null)
{
absoluteNames = new ArrayList();
relativesToRefs[relName] = absoluteNames;
// Start with the singulars in the various reachable namespaces, then add the plurals
if (existingOnly)
{
absoluteNames.AddRange(AllAbsoluteTopicNamesThatExist(relName));
foreach (TopicName alternate in relName.AlternateForms)
absoluteNames.AddRange(AllAbsoluteTopicNamesThatExist(alternate));
}
else
{
absoluteNames.AddRange(relName.AllAbsoluteTopicNamesFor(this));
foreach (TopicName alternate in relName.AlternateForms)
absoluteNames.AddRange(alternate.AllAbsoluteTopicNamesFor(this));
}
}
allReferencedTopicsFromTopic.AddRange(absoluteNames);
}
answer[topic] = allReferencedTopicsFromTopic;
}
return answer;
}