public object Clone()
{
CapabilityViewerClassHashtable cvcHT = new CapabilityViewerClassHashtable();
foreach( DictionaryEntry de in Dictionary )
cvcHT.Add( (MSR.LST.ConferenceXP.PayloadType)de.Key, (Type)de.Value);
return cvcHT;
}
public object Clone()
{
CapabilityViewerClassHashtable cvcHT = new CapabilityViewerClassHashtable();
foreach (DictionaryEntry de in Dictionary)
{
cvcHT.Add((MSR.LST.ConferenceXP.PayloadType)de.Key, (Type)de.Value);
}
return(cvcHT);
}
private static void AddCapabilityViewerClass(string fileName, Type type, string capName,
CapabilityViewerClassHashtable capabilityViewerClasses,
Capability.PayloadTypeAttribute pt, RegistryKey rtdocskey)
{
try
{
// Handle RTDocs as a special case.
// We checked for a default setting in app.config earlier.
// If we haven't loaded an RTDocs viewer yet, check the registry
// to see if the current one is the default viewer. If it is
// load it. If it isn't in the registry, add it as non-default.
// If there are no entries in the registry, the first viewer wins.
// It is possible to get into a state where the default viewer
// in the registry is uninstalled from the machine, in which case
// we are in trouble, because they will all be non-default.
if (pt.PayloadType.ToString() == "RTDocument")
{
// No RTDocs capability viewer has been loaded
if (!capabilityViewerClasses.ContainsKey(pt.PayloadType))
{
// See if this one is listed as the default in the registry
if (rtdocskey.ValueCount > 0)
{
object cpentry = rtdocskey.GetValue(capName);
if (cpentry != null) // There is a registry entry for this capability
{
if (cpentry.ToString() == "default")
{
capabilityViewerClasses.Add(pt.PayloadType, type);
}
}
else // No registry entry for this capability
{
// add to registry, but don't load
rtdocskey.SetValue(capName, "non-default");
}
}
else // No entries in registry. First one wins.
{
rtdocskey.SetValue(capName, "default");
capabilityViewerClasses.Add(pt.PayloadType, type);
}
}
else // An RTDocs capability viewer has already been loaded
{
// Mark the current one as non-default in the registry
rtdocskey.SetValue(capName, "non-default");
}
}
else
{
if (!capabilityViewerClasses.ContainsKey(pt.PayloadType))
{
capabilityViewerClasses.Add(pt.PayloadType, type);
}
else
{
string msg = string.Format(
"Multiple capability viewers exist for payload type - {0}. \r\n" +
"ConferenceXP selected {1} and will ignore {2}",
pt.PayloadType, capabilityViewerClasses[pt.PayloadType].Name,
capName);
MessageBox.Show(msg, "Duplicate Capability Viewers Detected",
MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
catch (Exception e)
{
string msg = "Accessing file " + fileName + "\n" + e.ToString();
eventLog.WriteEntry(msg, EventLogEntryType.Error, 99);
MessageBox.Show(msg, "Error Initializing Capability Viewer",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// Dynamically load assemblies into the API based on what interfaces they implement. Used to allow
/// 3rd parties to add custom CapabilitySenders and CapabilityViewers without recompiling the application
/// or changing its source code.
/// </summary>
/// <remarks>
/// Because this section of code frequently excepts when a developer is creating a new Capability and does something wrong,
/// we both write to the event log and display a message box so that the developer can find the error quickly. In experience,
/// just writing to the event log causes failures that new developers don't easily find.
/// </remarks>
public static void InitializeCapabilityClasses(out CapabilityViewerClassHashtable capabilityViewerClasses,
out CapabilitySenderClassHashtable capabilitySenderClasses)
{
// Initialize outbound parameters
capabilityViewerClasses = new CapabilityViewerClassHashtable();
capabilitySenderClasses = new CapabilitySenderClassHashtable();
#region Default RTDocs viewer from app.config
// Before starting to iterate through .dll's, check to see if a default
// RTDocument CapabilityViewer is identified in app.config. If one is
// found in app.config, and there is not already a default stored in
// the registry, then set this one as the default.
RegistryKey rtdocskey = Registry.CurrentUser.CreateSubKey("SOFTWARE\\Microsoft Research\\ConferenceXP\\Client\\" +
System.Reflection.Assembly.GetEntryAssembly().CodeBase + "\\CapabilityViewers");
string appconfigEntry;
if ((appconfigEntry = ConfigurationManager.AppSettings[AppConfig.CXP_RTDocumentViewerDefault]) != null)
{
// We only use the app.config setting if there is not already an entry marked as default
// in the registry
string[] names = rtdocskey.GetValueNames();
bool defExists = false;
foreach (string key in names)
{
object val = rtdocskey.GetValue(key);
if (val.ToString() == "default")
{
defExists = true;
break;
}
}
if (!defExists)
{
rtdocskey.SetValue(appconfigEntry, "default");
}
}
#endregion Default RTDocs viewer from app.config
// Get the directory of the executing .exe
DirectoryInfo diExe = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory;
// Find all the DLLs in that directory, looping through them all
FileInfo[] fis = diExe.GetFiles("*.dll");
foreach (FileInfo fiDll in fis)
{
try
{
// Load each DLL into memory, getting a list of all root types (including classes and interfaces)
Type[] types = Assembly.LoadFrom(fiDll.FullName).GetTypes();
foreach (Type type in types)
{
// You can't instantiate an abstract class
if (type.IsAbstract)
{
continue;
}
// If the class defines "IsRunable" (inherited through Capability), run it and check
// that this class can be run on the current machine. If not, skip the class.
if (type.IsSubclassOf(typeof(MSR.LST.ConferenceXP.Capability)))
{
PropertyInfo runableProp = type.GetProperty("IsRunable", BindingFlags.Static | BindingFlags.Public);
if (runableProp != null) // if the dll was compiled off of old code, it won't have "IsRunable"
{
MethodInfo getRunableMethod = runableProp.GetGetMethod();
object returnObj = getRunableMethod.Invoke(null, null);
if (!(returnObj is bool) || (((bool)returnObj) == false))
{
continue; // Skip this type becuase its own method says it isn't runable.
}
}
}
// Check required capability attributes
Type iCV = type.GetInterface("MSR.LST.ConferenceXP.ICapabilityViewer");
Type iCS = type.GetInterface("MSR.LST.ConferenceXP.ICapabilitySender");
Capability.PayloadTypeAttribute pt = null;
Capability.NameAttribute capabilityName = null;
if (iCV != null || iCS != null)
{
pt = (Capability.PayloadTypeAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.PayloadTypeAttribute));
capabilityName = (Capability.NameAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.NameAttribute));
// Without a payload type and a name, it is invalidly constructed
if (null == pt || null == capabilityName)
{
continue;
}
}
// Does it have an ICapabilityViewer interface?
if (iCV != null)
{
AddCapabilityViewerClass(fiDll.Name, type, capabilityName.Name,
capabilityViewerClasses, pt, rtdocskey);
}
// Does it have an ICapabilitySender interface?
if (iCS != null)
{
AddCapabilitySenderClass(fiDll.Name, type, capabilityName.Name,
capabilitySenderClasses);
}
} // end foreach tBaseType
}
// Some DLLs in the directory may not be .NET Assemblies (like msvcrt70.dll), and they will throw a BadImageFormatException here if not.
catch (BadImageFormatException) {}
// Perhaps a bad or old .Net Dll is here, ignore it. This was firing for Shockwave Flash COM interop assemblies
catch (TypeInitializationException) {}
// Trying to reload an already loaded Dll, occurs for Conference.Dll, so just continue on...
catch (ReflectionTypeLoadException) {}
}
rtdocskey.Flush();
}
private static void AddCapabilityViewerClass(string fileName, Type type, string capName,
CapabilityViewerClassHashtable capabilityViewerClasses,
Capability.PayloadTypeAttribute pt, RegistryKey rtdocskey)
{
try
{
// Handle RTDocs as a special case.
// We checked for a default setting in app.config earlier.
// If we haven't loaded an RTDocs viewer yet, check the registry
// to see if the current one is the default viewer. If it is
// load it. If it isn't in the registry, add it as non-default.
// If there are no entries in the registry, the first viewer wins.
// It is possible to get into a state where the default viewer
// in the registry is uninstalled from the machine, in which case
// we are in trouble, because they will all be non-default.
if (pt.PayloadType.ToString() == "RTDocument")
{
// No RTDocs capability viewer has been loaded
if (!capabilityViewerClasses.ContainsKey(pt.PayloadType))
{
// See if this one is listed as the default in the registry
if (rtdocskey.ValueCount > 0)
{
object cpentry = rtdocskey.GetValue(capName);
if (cpentry != null) // There is a registry entry for this capability
{
if (cpentry.ToString() == "default")
{
capabilityViewerClasses.Add(pt.PayloadType, type);
}
}
else // No registry entry for this capability
{
// add to registry, but don't load
rtdocskey.SetValue(capName, "non-default");
}
}
else // No entries in registry. First one wins.
{
rtdocskey.SetValue(capName, "default");
capabilityViewerClasses.Add(pt.PayloadType, type);
}
}
else // An RTDocs capability viewer has already been loaded
{
// Mark the current one as non-default in the registry
rtdocskey.SetValue(capName, "non-default");
}
}
else
{
if (!capabilityViewerClasses.ContainsKey(pt.PayloadType))
{
capabilityViewerClasses.Add(pt.PayloadType, type);
}
else
{
string msg = string.Format(CultureInfo.CurrentCulture, Strings.MultipleCapabilityViewersExist,
pt.PayloadType, capabilityViewerClasses[pt.PayloadType].Name, capName);
RtlAwareMessageBox.Show(null, msg, Strings.DuplicateCapabilityViewersDetected,
MessageBoxButtons.OK, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button1,
(MessageBoxOptions)0);
}
}
}
catch (Exception e)
{
string msg = string.Format(CultureInfo.CurrentCulture, Strings.AccessingFile, fileName, e.ToString());
eventLog.WriteEntry(msg, EventLogEntryType.Error, 99);
RtlAwareMessageBox.Show(null, msg, Strings.ErrorInitializingCapabilityViewer, MessageBoxButtons.OK,
MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, (MessageBoxOptions)0);
}
}
/// <summary>
/// Dynamically load assemblies into the API based on what interfaces they implement. Used to allow
/// 3rd parties to add custom CapabilitySenders and CapabilityViewers without recompiling the application
/// or changing its source code.
/// </summary>
/// <remarks>
/// Because this section of code frequently excepts when a developer is creating a new Capability and does something wrong,
/// we both write to the event log and display a message box so that the developer can find the error quickly. In experience,
/// just writing to the event log causes failures that new developers don't easily find.
/// </remarks>
public static void InitializeCapabilityClasses(out CapabilityViewerClassHashtable capabilityViewerClasses,
out CapabilitySenderClassHashtable capabilitySenderClasses)
{
// Initialize outbound parameters
capabilityViewerClasses = new CapabilityViewerClassHashtable();
capabilitySenderClasses = new CapabilitySenderClassHashtable();
#region Default RTDocs viewer from app.config
// Before starting to iterate through .dll's, check to see if a default
// RTDocument CapabilityViewer is identified in app.config. If one is
// found in app.config, and there is not already a default stored in
// the registry, then set this one as the default.
RegistryKey rtdocskey = Registry.CurrentUser.CreateSubKey("SOFTWARE\\Microsoft Research\\ConferenceXP\\Client\\" +
System.Reflection.Assembly.GetEntryAssembly().CodeBase + "\\CapabilityViewers");
string appconfigEntry;
if ((appconfigEntry = ConfigurationManager.AppSettings[AppConfig.CXP_RTDocumentViewerDefault]) != null)
{
// We only use the app.config setting if there is not already an entry marked as default
// in the registry
string[] names = rtdocskey.GetValueNames();
bool defExists = false;
foreach (string key in names)
{
object val = rtdocskey.GetValue(key);
if (val.ToString() == "default")
{
defExists = true;
break;
}
}
if (!defExists)
rtdocskey.SetValue(appconfigEntry, "default");
}
#endregion Default RTDocs viewer from app.config
// Get the directory of the executing .exe
DirectoryInfo diExe = new FileInfo(Assembly.GetExecutingAssembly().Location).Directory;
// Find all the DLLs in that directory, looping through them all
FileInfo[] fis = diExe.GetFiles("*.dll");
foreach (FileInfo fiDll in fis)
{
try
{
// Load each DLL into memory, getting a list of all root types (including classes and interfaces)
Type[] types = Assembly.LoadFrom(fiDll.FullName).GetTypes();
foreach (Type type in types)
{
// You can't instantiate an abstract class
if (type.IsAbstract)
continue;
// If the class defines "IsRunable" (inherited through Capability), run it and check
// that this class can be run on the current machine. If not, skip the class.
if (type.IsSubclassOf(typeof(MSR.LST.ConferenceXP.Capability)))
{
PropertyInfo runableProp = type.GetProperty("IsRunable", BindingFlags.Static | BindingFlags.Public);
if (runableProp != null) // if the dll was compiled off of old code, it won't have "IsRunable"
{
MethodInfo getRunableMethod = runableProp.GetGetMethod();
object returnObj = getRunableMethod.Invoke(null, null);
if (!(returnObj is bool) || (((bool)returnObj) == false))
{
continue; // Skip this type becuase its own method says it isn't runable.
}
}
}
// Check required capability attributes
Type iCV = type.GetInterface("MSR.LST.ConferenceXP.ICapabilityViewer");
Type iCS = type.GetInterface("MSR.LST.ConferenceXP.ICapabilitySender");
Capability.PayloadTypeAttribute pt = null;
Capability.NameAttribute capabilityName = null;
if (iCV != null || iCS != null)
{
pt = (Capability.PayloadTypeAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.PayloadTypeAttribute));
capabilityName = (Capability.NameAttribute)Attribute.GetCustomAttribute(type,
typeof(Capability.NameAttribute));
// Without a payload type and a name, it is invalidly constructed
if (null == pt || null == capabilityName)
continue;
}
// Does it have an ICapabilityViewer interface?
if (iCV != null)
{
AddCapabilityViewerClass(fiDll.Name, type, capabilityName.Name,
capabilityViewerClasses, pt, rtdocskey);
}
// Does it have an ICapabilitySender interface?
if (iCS != null)
{
AddCapabilitySenderClass(fiDll.Name, type, capabilityName.Name,
capabilitySenderClasses);
}
} // end foreach tBaseType
}
// Some DLLs in the directory may not be .NET Assemblies (like msvcrt70.dll), and they will throw a BadImageFormatException here if not.
catch (BadImageFormatException) {}
// Perhaps a bad or old .Net Dll is here, ignore it. This was firing for Shockwave Flash COM interop assemblies
catch (TypeInitializationException) {}
// Trying to reload an already loaded Dll, occurs for Conference.Dll, so just continue on...
catch (ReflectionTypeLoadException) {}
}
rtdocskey.Flush();
}