/// <summary>
/// Gets description (for logging purposes).
/// </summary>
/// <returns></returns>
public string GetDescription()
{
// ordered list of topics;
List <TopicInfo> orderedTopics = new List <TopicInfo>();
TopicInfo currentTopic = this;
while (currentTopic != null)
{
orderedTopics.Add(currentTopic);
currentTopic = currentTopic.ParentTopic;
}
// namespaces prefixes cache;
Dictionary <string, string> namespacePrefixes = new Dictionary <string, string>();
foreach (TopicInfo topicInfo in orderedTopics)
{
if (!string.IsNullOrEmpty(topicInfo.Namespace) && !string.IsNullOrEmpty(topicInfo.NamespacePrefix))
{
if (!namespacePrefixes.ContainsKey(topicInfo.Namespace))
{
namespacePrefixes.Add(topicInfo.Namespace, topicInfo.NamespacePrefix);
}
}
}
string topicPath = null;
topicPath = orderedTopics[orderedTopics.Count - 1].QName;
for (int i = orderedTopics.Count - 2; i >= 0; i--)
{
TopicInfo nextTopic = orderedTopics[i];
topicPath = string.Format("{0}/{1}",
topicPath, nextTopic.QName);
}
StringBuilder sb = new StringBuilder();
bool bFirst = true;
foreach (string nameSpace in namespacePrefixes.Keys)
{
string entry = string.Format(" xmlns:{0}={1}", namespacePrefixes[nameSpace], nameSpace);
if (bFirst)
{
sb.Append(entry);
bFirst = false;
}
else
{
sb.Append(Environment.NewLine);
sb.Append(entry);
}
}
string namespacesDefinition = sb.ToString();
if (!string.IsNullOrEmpty(namespacesDefinition))
{
return(string.Format("{0}, where {1}{2}", topicPath, Environment.NewLine, namespacesDefinition));
}
else
{
return(topicPath);
}
}
/// <summary>
/// Constructs TopicInfo from XmlElement (received in GetEventProperties)
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
public static TopicInfo ConstructTopicInfo(XmlElement element)
{
List <XmlElement> orderedTopics = new List <XmlElement>();
orderedTopics.Add(element);
XmlNode parent = element.ParentNode;
while (parent != null && !(parent.LocalName == "TopicSet" && parent.NamespaceURI == BaseNotification.T1))
{
orderedTopics.Add(parent as XmlElement);
parent = parent.ParentNode;
}
TopicInfo current = null;
Dictionary <string, string> prefixes = new Dictionary <string, string>();
string lastNamespace = string.Empty;
for (int i = orderedTopics.Count - 1; i >= 0; i--)
{
XmlElement currentElement = orderedTopics[i];
string topicNs = /*string.IsNullOrEmpty(currentElement.NamespaceURI)
* ? lastNamespace
* : */currentElement.NamespaceURI;
string namespacePrefix = currentElement.GetPrefixOfNamespace(currentElement.NamespaceURI);
if (!string.IsNullOrEmpty(namespacePrefix))
{
if (prefixes.ContainsKey(namespacePrefix) && topicNs != prefixes[namespacePrefix])
{
string pattern = "tns{0}";
int j = 1;
while (true)
{
string prefix = string.Format(pattern, j);
if (!prefixes.ContainsKey(prefix))
{
namespacePrefix = prefix;
break;
}
j++;
}
}
if (!prefixes.ContainsKey(namespacePrefix))
{
prefixes.Add(namespacePrefix, topicNs);
}
}
TopicInfo topicInfo = new TopicInfo()
{
Name = currentElement.LocalName,
Namespace = topicNs,
NamespacePrefix = namespacePrefix
};
topicInfo.ParentTopic = current;
lastNamespace = topicNs;
current = topicInfo;
}
;
return(current);
}
