/// <summary>
/// Finds out expired resources in the <paramref name="resourceStorage"/> and deletes them.
/// </summary>
/// <typeparam name="T"> The type of an identifier of a resource. </typeparam>
/// <param name="resourceStorage">
/// The storage where to perform cleanup in.
/// </param>
/// <param name="expirationPolicy">
/// The resource expiration policy.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="resourceStorage"/> is <see langword="null"/> or
/// <paramref name="expirationPolicy"/> is <see langword="null"/>.
/// </exception>
public async Task ExecuteStorageCleanup <T>(
[NotNull] IResourceStorage <T> resourceStorage,
[NotNull] IResourceExpirationPolicy expirationPolicy)
{
AssertArg.NotNull(resourceStorage, nameof(resourceStorage));
AssertArg.NotNull(expirationPolicy, nameof(expirationPolicy));
_log?.Debug($"Calling {resourceStorage.GetType().Name} storage for resource details.");
var resources = (await resourceStorage.GetResourceDetails()).ToArray();
_log?.Debug($"Fetched details about {resources.Length} resources.");
var resourceIdsToDelete = expirationPolicy
.FindExpiredResources(resources)
.ToArray();
if (!resourceIdsToDelete.Any())
{
_log?.Info("No expired resources were found thus no resource is deleted.");
return;
}
_log?.Debug($"Calling {resourceStorage.GetType().Name} storage for expired resources deletion.");
await resourceStorage.DeleteResources(resourceIdsToDelete);
_log?.Debug($"Deleted {resourceIdsToDelete.Length} expired resources.");
}
public RemainingBatteryChargeEvent(object sender, int percentRemaining, TimeSpan dischargeTimeRemaining)
{
Sender = AssertArg.IsNotNull(sender, nameof(sender));
PercentRemaining = percentRemaining;
DischargeTimeRemaining = dischargeTimeRemaining;
}
public Task SendAsync(
Func <Task> action,
bool ignoreExceptionHandler = false,
string memberName = null,
string filePath = null,
int lineNumber = 0)
{
AssertArg.IsNotNull(action, nameof(action));
EnsureInitialized();
bool isBackground = InvokeRequired;
TaskCompletionSource <object> source = isBackground
? new TaskCompletionSource <object>()
: null;
Func <Task> wrappedAction
= GetWrappedAction(
action, source, ignoreExceptionHandler,
memberName, filePath, lineNumber);
if (isBackground)
{
Context.Send(state => wrappedAction(), null);
return(source.Task);
}
return(wrappedAction());
}
protected override void InsertItem(int index, T item)
{
AssertArg.IsNotNull(item, nameof(item));
if (ignoreChanges)
{
base.InsertItem(index, item);
return;
}
TInner obj = item.GetObject();
if (obj == null)
{
throw new Exception("Item must have an existing attached object " +
"to insert into an AdaptiveCollection.");
}
try
{
ignoreChanges = true;
monitoredCollection.Insert(index, obj);
}
finally
{
ignoreChanges = false;
}
base.InsertItem(index, item);
}
public void RegisterState <T>(
string stateKey,
Func <T> getterFunc,
Action <T> setterAction,
ApplicationStateType stateType)
{
AssertArg.IsNotNull(stateKey, nameof(stateKey));
AssertArg.IsNotNull(getterFunc, nameof(getterFunc));
AssertArg.IsNotNull(setterAction, nameof(setterAction));
if (stateType == ApplicationStateType.Persistent)
{
lock (persistentStateLock)
{
persistentState[stateKey]
= new Accessor <T>(getterFunc, setterAction);
}
}
else
{
lock (transientStateLock)
{
transientState[stateKey]
= new Accessor <T>(getterFunc, setterAction);
}
}
}
public virtual void Navigate(
string relativeUrl,
object navigationArgument = null)
{
AssertArg.IsNotNullOrWhiteSpace(relativeUrl, nameof(relativeUrl));
bool hasAction;
Action <object> action;
dictionaryLock.EnterReadLock();
try
{
hasAction = pathDictionary.TryGetValue(relativeUrl, out action);
}
finally
{
dictionaryLock.ExitReadLock();
}
if (hasAction)
{
action(navigationArgument);
}
else
{
throw new ArgumentException(
"Unknown path: " + relativeUrl);
}
}
public async Task DecryptAsync(
Stream encryptedStream, string password, Stream outputStream)
{
AssertArg.IsNotNull(encryptedStream, nameof(encryptedStream));
AssertArg.IsNotNull(password, nameof(password));
byte[] salt = new byte[SaltLength];
await encryptedStream.ReadAsync(salt, 0, SaltLength);
using (Aes aes = Aes.Create())
{
var deriveBytes = new Rfc2898DeriveBytes(password, salt);
aes.Key = deriveBytes.GetBytes(128 / 8);
aes.IV = aes.Key;
/* A temporary stream is used because CryptoStream automatically closes
* the output stream. This behaviour is changable in .NET 4.7.2,
* which includes a new CryptoStream constructor
* with a leaveOpen parameter. */
using (var tempStream = new MemoryStream())
{
using (var cryptoStream = new CryptoStream(
tempStream, aes.CreateDecryptor(), CryptoStreamMode.Write))
{
await encryptedStream.CopyToAsync(cryptoStream);
cryptoStream.FlushFinalBlock();
tempStream.Position = 0;
await tempStream.CopyToAsync(outputStream);
}
}
}
}
public object ConvertToType(object value, Type type)
{
AssertArg.IsNotNull(type, nameof(type));
AssertArg.IsNotNull(value, nameof(value));
if (value == null || type.IsAssignableFrom(value.GetType()))
{
return(value);
}
Type valueType = value.GetType();
TypeConverter converter = GetTypeConverter(valueType);
if (converter != null && converter.CanConvertTo(type))
{
value = converter.ConvertTo(value, type);
return(value);
}
converter = GetTypeConverter(type);
if (converter != null && converter.CanConvertFrom(valueType))
{
value = converter.ConvertFrom(value);
return(value);
}
return(null);
}
public static Action BindTarget(PropertyBinding propertyBinding, object dataContext)
{
AssertArg.IsNotNull(propertyBinding.View, "propertyBinding.View");
var view = propertyBinding.View as INotifyPropertyChanged;
if (view == null)
{
throw new InvalidOperationException("Binding target does not implement INotifyPropertyChanged.");
}
string propertyName = propertyBinding.TargetProperty.Name;
PropertyChangedEventHandler handler = (sender, args) =>
{
if (args.PropertyName == propertyName)
{
var rawValue = propertyBinding.TargetProperty.GetValue(propertyBinding.View);
ViewValueChangedHandler.HandleTargetValueChanged(propertyBinding, rawValue, dataContext);
}
};
view.PropertyChanged += handler;
Action removeAction = () => { view.PropertyChanged -= handler; };
return(removeAction);
}
/// <summary>
/// Initializes a new instance of the <see cref="Log4NetWrapper" /> class.
/// </summary>
/// <param name="logImpl">
/// The implementation of the <see cref="T:log4net.ILog"/> interface.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="logImpl"/> is <see langword="null"/>.
/// </exception>
public Log4NetWrapper(
[NotNull] log4net.ILog logImpl)
{
AssertArg.NotNull(logImpl, nameof(logImpl));
_logImpl = logImpl;
}
/// <summary>
/// Creates a handler for the specified event,
/// so that when the event is raised, the specified
/// action is invoked.
/// </summary>
/// <param name="eventInfo">The event.</param>
/// <param name="action">
/// The action to invoke when the event is raised.</param>
/// <returns>A delegate that can be used
/// to subscribe to the event.</returns>
/// <example>
/// var handler = ReflectionCompiler.CreateEventHandler(eventInfo, ExecuteCommand);
/// eventInfo.AddEventHandler(element, handler);
/// </example>
public static Delegate CreateEventHandler(
EventInfo eventInfo, Action action)
{
AssertArg.IsNotNull(eventInfo, nameof(eventInfo));
AssertArg.IsNotNull(action, nameof(action));
/* Source: http://stackoverflow.com/questions/3478218/using-reflection-emit-to-implement-a-interface */
Type handlerType = eventInfo.EventHandlerType;
MethodInfo invokeMethodInfo = handlerType.GetTypeInfo().GetDeclaredMethod("Invoke");
ParameterInfo[] eventParams = invokeMethodInfo.GetParameters();
//lambda: (object x0, EventArgs x1) => d()
IEnumerable <ParameterExpression> parameters
= eventParams.Select(p => Expression.Parameter(p.ParameterType, p.Name));
// - assumes void method with no arguments but can be
// changed to accomodate any supplied method
MethodCallExpression body = Expression.Call(
Expression.Constant(action), action.GetType().GetTypeInfo().GetDeclaredMethod("Invoke"));
LambdaExpression lambda = Expression.Lambda(body, parameters.ToArray());
Delegate compiledLambda = lambda.Compile();
Delegate result = invokeMethodInfo.CreateDelegate(handlerType, compiledLambda);
return(result);
}
public AdaptiveCollection(ObservableCollection <TInner> monitoredCollection)
{
AssertArg.IsNotNull(monitoredCollection, nameof(monitoredCollection));
this.monitoredCollection = monitoredCollection;
monitoredCollection.CollectionChanged += OnCollectionChanged;
try
{
ignoreChanges = true;
foreach (var command in monitoredCollection)
{
var attacher = new T();
attacher.AttachObject(command);
lookupDictionary[command] = attacher;
base.Add(attacher);
}
}
finally
{
ignoreChanges = false;
}
}
object GetSettingCore(string key, Type settingType, object defaultValue, out bool settingExists)
{
AssertArg.IsNotNull(key, nameof(key));
/* [DV] We first test if the setting type is IXmlConvertible.
* If it isn't then it may mean that the type <c>object</c> has been passed in via an overload.
* The type of the return value may be IXmlConvertible and hence we test the default value
* as a secondary precaution. It means that in some edge scenario you may find a type that is passed
* as the default value has implemented IXmlConvertible whereas the stored value doesn't implement it. */
bool xmlConvertible = typeof(IXmlConvertible).IsAssignableFromEx(settingType);
xmlConvertible |= settingType == typeof(object) && defaultValue is IXmlConvertible;
bool returningDefaultValue;
object result;
lockSlim.EnterReadLock();
try
{
result = GetSettingFromStore(key, xmlConvertible, settingType, defaultValue, out returningDefaultValue);
}
finally
{
lockSlim.ExitReadLock();
}
settingExists = !returningDefaultValue;
return(result);
}
/// <summary>
/// Determines whether the specified text contains
/// the specified substring.
/// </summary>
/// <param name="text">The text.</param>
/// <param name="substring">The substring.</param>
/// <returns>
/// <c>true</c> if the specified text contains
/// the specified substring;
/// otherwise, <c>false</c>.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Occurs if either parameter is <c>null</c>.</exception>
public static bool ContainsIgnoreCase(this string text, string substring)
{
AssertArg.IsNotNull(text, nameof(text));
AssertArg.IsNotNull(substring, nameof(substring));
return(text.IndexOf(substring, StringComparison.OrdinalIgnoreCase) > -1);
}
public IocContainerExtension(string namespaceAliasedTypeName, string containerKey)
{
this.namespaceAliasedTypeName = AssertArg.IsNotNullOrWhiteSpace(namespaceAliasedTypeName, nameof(namespaceAliasedTypeName));
SetAliasAndTypeName(namespaceAliasedTypeName);
this.containerKey = AssertArg.IsNotNull(containerKey, nameof(containerKey));
}
static void FocusControl(UIElement element)
{
AssertArg.IsNotNull(element, nameof(element));
Keyboard.Focus(element);
var focusResult = element.Focus();
if (focusResult)
{
return;
}
element.Dispatcher.Invoke(DispatcherPriority.Background, (Action) delegate
{
focusResult = element.Focus();
Keyboard.Focus(element);
if (!focusResult)
{
CommitFocusedElement();
focusResult = element.Focus();
Keyboard.Focus(element);
}
if (!focusResult)
{
WriteLog(string.Format("Unable to focus UIElement {0} "
+ "IsVisible: {1}, Focusable: {2}, Enabled: {3}",
element, element.IsVisible, element.Focusable,
element.IsEnabled));
}
});
}
public void RegisterConverter(
string tagName, Func <object, object> convertFunc)
{
AssertArg.IsNotNull(tagName, nameof(tagName));
AssertArg.IsNotNull(convertFunc, nameof(convertFunc));
RegisterConverterCore(tagName, new DelegateConverter(convertFunc));
}
/// <summary>
/// Initializes a new instance of <c>ValueChangingMessageBase</c>
/// </summary>
/// <param name="sender">
/// Commonly this is the initiator of the message.
/// Cannot be <c>null</c>.</param>
/// <param name="currentValue">
/// The current value.</param>
/// <param name="newValue">
/// What the new value will be if not cancelled.</param>
protected ValueChangingMessageBase(
object sender, TValue currentValue, TValue newValue)
{
Sender = AssertArg.IsNotNull(sender, nameof(sender));
CurrentValue = currentValue;
NewValue = newValue;
}
/// <summary>
/// Compares two lists for equivalence.
/// Objects in both lists must be the same
/// and in the same position.
/// </summary>
/// <param name="list1">The first list to compare.
/// Can not be null.</param>
/// <param name="list2">The second list to compare.
/// Can be null.</param>
/// <returns><c>true</c> if the collections
/// are equal; <c>false</c> otherwise.</returns>
/// <exception cref="ArgumentNullException">
/// Raised if <c>list1</c> is <c>null</c>.</exception>
public static bool IsEqualList(
this IList list1,
IList list2)
{
AssertArg.IsNotNull(list1, nameof(list1));
return(CollectionComparer.AreEqualLists(list1, list2));
}
/// <summary>
/// Initializes a new instance of <c>ValueChangedMessageBase</c>
/// </summary>
/// <param name="sender">
/// Commonly this is the initiator of the message.
/// Cannot be <c>null</c>.</param>
/// <param name="oldValue">The previous value.</param>
/// <param name="newValue">The new value.</param>
protected ValueChangedMessageBase(
object sender, TValue oldValue, TValue newValue)
{
Sender = AssertArg.IsNotNull(sender, nameof(sender));
OldValue = oldValue;
NewValue = newValue;
}
public void Register(
Type type,
Func <object> getInstanceFunc,
bool singleton = false,
string key = null)
{
AssertArg.IsNotNull(type, nameof(type));
AssertArg.IsNotNull(getInstanceFunc, nameof(getInstanceFunc));
key = GetKeyValueOrDefault(key);
bool useLock = ThreadSafe;
if (useLock)
{
lockSlim.EnterWriteLock();
}
try
{
if (!typeDictionary.TryGetValue(type,
out ResolverDictionary resolverDictionary))
{
resolverDictionary = new ResolverDictionary();
}
Resolver resolver = new Resolver {
Singleton = singleton
};
Func <object> getObjectFunc = () =>
{
var result = getInstanceFunc();
if (resolver.Singleton)
{
resolver.CreateInstanceFunc = null;
resolver.Instance = result;
}
return(result);
};
resolver.CreateInstanceFunc = getObjectFunc;
resolverDictionary[key] = resolver;
keyDictionary[key] = type;
typeDictionary[type] = resolverDictionary;
}
finally
{
if (useLock)
{
lockSlim.ExitWriteLock();
}
}
}
/// <summary>
/// Focuses the specified control.
/// If the control resides in a <see cref="TabControl"/>
/// the <see cref="TabItem"/> is made visible
/// and the control is focussed.
/// </summary>
/// <param name="control">The control.</param>
public static void Focus(UIElement control)
{
AssertArg.IsNotNull(control, nameof(control));
DependencyObject parent;
var childControl = control as FrameworkElement;
if (childControl == null)
{
/* What else can we do in this scenario? */
FocusControl(control);
return;
}
var listBoxItem = control as ListBoxItem;
if (listBoxItem != null)
{
var itemParent = (VirtualizingStackPanel)VisualTreeHelper.GetParent(listBoxItem);
childControl = ItemsControl.GetItemsOwner(itemParent);
}
var expander = control as Expander;
if (expander != null)
{
expander.IsExpanded = true;
}
while (childControl != null && (parent = childControl.Parent) != null)
{
var tabItem = parent as TabItem;
if (tabItem != null)
{
var tabControl = tabItem.Parent as TabControl;
if (tabControl != null)
{
tabControl.SelectedItem = tabItem;
break;
}
}
expander = parent as Expander;
if (expander != null)
{
expander.IsExpanded = true;
}
childControl = parent as FrameworkElement;
if (childControl == null)
{
return; /* Shouldn't get here. */
}
}
listBoxItem?.BringIntoView();
FocusControl(control);
}
void DeregisterTransientState(string stateKey)
{
AssertArg.IsNotNull(stateKey, nameof(stateKey));
lock (transientStateLock)
{
transientState.Remove(stateKey);
}
}
public override async Task <MultipleChoiceResponse <TSelectableItem> > AskMultipleChoiceQuestionAsync <TSelectableItem>(
MultipleChoiceQuestion <TSelectableItem> question)
{
AssertArg.IsNotNull(question, nameof(question));
var r = await AskMultipleChoiceAsync(question);
return(r);
}
void DeregisterPersistentState(string stateKey)
{
AssertArg.IsNotNull(stateKey, nameof(stateKey));
lock (persistentStateLock)
{
persistentState.Remove(stateKey);
}
}
public SerializableSetting(
string name,
object settingValue,
StorageLocation?storageLocation)
{
Name = AssertArg.IsNotNull(name, nameof(name));
SettingValue = settingValue;
StorageLocation = storageLocation;
}
/// <summary>
/// Performs validation of the <paramref name="rules"/>.
/// </summary>
/// <param name="rules"> The set of retention rules to validate. </param>
public void Validate([NotNull, ItemNotNull] IReadOnlyCollection <RetentionRule> rules)
{
AssertArg.NotNullOrEmpty(rules, nameof(rules));
AssertArg.NoNullItems(rules, nameof(rules));
AssertNoDuplicates(rules);
AssertNoContradictions(rules);
}
/// <summary>
/// Encryptes a <c>byte</c> array using
/// the specified password. The encrypted data
/// is returned as a byte array.
/// </summary>
/// <param name="encryptor">An <c>IEncryptor</c> instance.</param>
/// <param name="plainBytes">The bytes to be encrypted.
/// It is not modified.</param>
/// <param name="password">A password to use for encryption.</param>
/// <returns>An array of encrypted bytes.</returns>
/// <exception cref="System.ArgumentNullException">
/// Occurs if any of the arguments are null.</exception>
public static async Task <byte[]> EncryptAsync(this IEncryptor encryptor,
byte[] plainBytes, string password)
{
AssertArg.IsNotNull(encryptor, nameof(encryptor));
AssertArg.IsNotNull(plainBytes, nameof(plainBytes));
AssertArg.IsNotNull(password, nameof(password));
return(await EncryptCoreAsync(encryptor, plainBytes, password));
}
/// <summary>
/// Creates a new instance.
/// </summary>
/// <param name="result">The user response.</param>
/// <param name="question">The original question.</param>
/// <param name="error">
/// If an error occurs while asking the question
/// it is passed to the constructor.</param>
public QuestionResponse(
TResponse result,
IQuestion <TResponse> question,
Exception error = null)
{
Response = result;
Question = AssertArg.IsNotNull(question, nameof(question));
Error = error;
}
public void Register(IEnumerable <IUserOption> userOptions, IOptionCategory optionCategory)
{
AssertArg.IsNotNull(userOptions, nameof(userOptions));
AssertArg.IsNotNull(optionCategory, nameof(optionCategory));
/* We regect all options if any are already registered. */
Tuple <IOptionCategory, List <IUserOption> > existingCategoryOptions = null;
foreach (KeyValuePair <IOptionCategory, List <IUserOption> > pair in categoryDictionary)
{
foreach (IUserOption userOption in userOptions)
{
IUserOption existingOption = null;
foreach (IUserOption option in pair.Value)
{
if (!string.IsNullOrEmpty(option.SettingKey) &&
object.Equals(option.SettingKey, userOption.SettingKey))
{
existingOption = option;
break;
}
}
//IUserOption existingOption = (from option in pair.Value
// where object.Equals(option.SettingKey, userOption.SettingKey)
// select option).FirstOrDefault();
if (existingOption != null)
{
throw new DuplicateItemException(existingOption, userOption);
}
}
if (pair.Key.Id == optionCategory.Id)
{
existingCategoryOptions = new Tuple <IOptionCategory, List <IUserOption> >(pair.Key, pair.Value);
}
}
List <IUserOption> list;
if (existingCategoryOptions != null)
{
list = existingCategoryOptions.Item2;
}
else
{
list = new List <IUserOption>();
categoryDictionary.Add(optionCategory, list);
}
foreach (IUserOption userOption in userOptions)
{
list.Add(userOption);
}
}
