public CacheRule CacheRuleForAllPossibleInstancesOfTopic(TopicName aName)
{
TopicsCacheRule rule = new TopicsCacheRule(Federation);
foreach (AbsoluteTopicName possible in aName.AllAbsoluteTopicNamesFor(this))
rule.AddTopic(possible);
CompositeCacheRule answer = new CompositeCacheRule();
answer.Add(rule);
answer.Add(CacheRuleForDefinition); // Add the cache rule for the content base, too, since if that changes there might be a change in imports
return answer;
}
/// <summary>
/// A list of TopicChanges to a topic since a given date [sorted by date]
/// </summary>
/// <param name="topic">A given date</param>
/// <param name="stamp">A non-null timestamp; changes before this time won't be included in the answer </param>
/// <returns>Enumeration of TopicChanges</returns>
override public IEnumerable AllChangesForTopicSince(LocalTopicName topic, DateTime stamp, CompositeCacheRule rule)
{
ArrayList answer = new ArrayList();
FileInfo[] infos = FileInfosForTopic(topic);
ArrayList sortable = new ArrayList();
foreach (FileInfo each in infos)
sortable.Add(new FileInfoTopicData(each, Namespace));
BackingTopic back = GetBackingTopicNamed(topic);
if (back != null)
sortable.Add(new BackingTopicTopicData(back));
sortable.Sort(new TimeSort());
TopicsCacheRule tcr = null;
if (rule != null)
{
tcr = new TopicsCacheRule(Federation);
tcr.AddTopic(topic.AsAbsoluteTopicName(Namespace));
rule.Add(tcr);
}
foreach (TopicData each in sortable)
{
if (each.LastModificationTime < stamp)
continue;
AbsoluteTopicName name = topic.AsAbsoluteTopicName(Namespace);
name.Version = each.Version;
TopicChange change = TopicChangeFromName(name);
answer.Add(change);
if (tcr != null)
tcr.AddTopic(name.AsAbsoluteTopicName(Namespace));
}
return answer;
}
/// <summary>
/// A list of TopicChanges to a topic since a given date [sorted by date]
/// </summary>
/// <param name="topic">A given date</param>
/// <param name="stamp">A non-null timestamp; changes before this time won't be included in the answer </param>
/// <param name="rule">A composite cache rule to fill with rules that represented accumulated dependencies (or null)</param>
/// <returns>Enumeration of TopicChanges</returns>
public override IEnumerable AllChangesForTopicSince(LocalTopicName topic, DateTime stamp, CompositeCacheRule rule)
{
ArrayList answer = new ArrayList();
SqlInfoForTopic[] infos = SqlHelper.GetSqlTopicInfosForTopicSince(Namespace, topic.Name, stamp, ConnectionString);
ArrayList sortable = new ArrayList();
foreach (SqlInfoForTopic each in infos)
sortable.Add(new SqlInfoTopicData(each, Namespace));
BackingTopic back = GetBackingTopicNamed(topic);
bool sortAgain = false;
if (back != null)
{
sortAgain = true;
sortable.Add(new BackingTopicTopicData(back));
}
if( sortAgain )
sortable.Sort(new TimeSort());
TopicsCacheRule tcr = null;
if (rule != null)
{
tcr = new TopicsCacheRule(Federation);
tcr.AddTopic(topic.AsAbsoluteTopicName(Namespace));
rule.Add(tcr);
}
foreach (TopicData each in sortable)
{
if (each.LastModificationTime < stamp)
continue;
AbsoluteTopicName name = topic.AsAbsoluteTopicName(Namespace);
name.Version = each.Version;
TopicChange change = TopicChangeFromName(name);
answer.Add(change);
if (tcr != null)
tcr.AddTopic(name.AsAbsoluteTopicName(Namespace));
}
return answer;
}
