/// <summary> Parses the extension definition stream and creates a collection of Extension Map. </summary>
/// <returns>Instance of <see cref="ExtensionService"/></returns>
public ExtensionPointMap Parse()
{
ExtensionPointMap map = new ExtensionPointMap();
XDocument xmlDocument;
try {
xmlDocument = XDocument.Load(_stream);
} catch (Exception ex) {
throw new ExtensionsParsingException("Error on parsing the 'extensions.xml'.", ex);
}
IEnumerable <XElement> extensions = from extension in xmlDocument.Descendants("extension")
select extension;
foreach (XElement extension in extensions)
{
XAttribute attrPoint = extension.Attribute(PointDefinition);
if (attrPoint == null)
{
throw new ExtensionsParsingException("Attribute 'point' is missing or invalid!");
}
string id = attrPoint.Value;
IList <IConfigurationElement> configurationElements = ParseConfigurationElements(extension);
map.AddAll(id, configurationElements);
}
return(map);
}
/// <summary> Starts the Extension Service. </summary>
public void Start()
{
if (_started)
{
return;
}
iLogger.Debug("Starting extension service");
IList <IPluginInfo> providedPlugins = PluginService.Instance.ProvidedPlugins;
for (int i = -1; ++i != providedPlugins.Count;)
{
IPluginInfo plugin = providedPlugins[i];
Stream stream = plugin.Bundle.GetResourceAsStream(ExtensionFileName);
if (stream == null)
{
continue;
}
// Create a parser and parse the stream
ExtensionFileParser parser = ExtensionFileParser.GetInstance(stream);
ExtensionPointMap map = parser.Parse();
// Map bundle to Configuration Elements
IList <IConfigurationElement> cfgElements = new List <IConfigurationElement>(map.Count);
using (IEnumerator <KeyValuePair <string, IList <IConfigurationElement> > > itr = map.GetEnumerator()) {
while (itr.MoveNext())
{
KeyValuePair <string, IList <IConfigurationElement> > entry = itr.Current;
IList <IConfigurationElement> cfgElementSet = entry.Value;
for (int j = -1; ++j != cfgElementSet.Count;)
{
IConfigurationElement cfgEl = cfgElementSet[j];
cfgElements.Add(cfgEl);
}
}
}
_bundleToConfigurationElementMap.Add(plugin.Bundle, cfgElements);
// Merge the new elements to the existing ones
_extensionPointMap.Merge(map);
}
_started = true;
iLogger.Debug("Extension service started");
}
/// <summary> Adds all items of the given map to this one. </summary>
/// <param name="map">Map which contains all items that will be added to this one</param>
public void Merge(ExtensionPointMap map)
{
using (IEnumerator <string> itr = map._idToCollectionMap.Keys.GetEnumerator()) {
while (itr.MoveNext())
{
string id = itr.Current;
if (id == null)
{
continue;
}
IList <IConfigurationElement> elements = map._idToCollectionMap[id];
AddAll(id, elements);
}
}
}
