public override void OnGetValue(LocationInterceptionArgs args)
{
if (!_valueSet)
{
_valueSet = true;
if (IsGuid)
{
//Console.WriteLine("Initializing Guid");
if (args.Location.LocationType == typeof(string))
args.SetNewValue(Guid.NewGuid().ToString());
else if (args.Location.LocationType == typeof(Guid))
args.SetNewValue(Guid.NewGuid());
}
else if (_defaultValue != null)
{
args.SetNewValue(_defaultValue);
//Console.WriteLine("Initialized {0} to |{1}|", args.LocationName, args.GetCurrentValue());
}
else if (args.Location.PropertyInfo.GetType().IsClass)
{
var t = args.Location.PropertyInfo.PropertyType;
if (t.GetConstructor(Type.EmptyTypes) != null)
{
//Console.WriteLine("Initializing {0}", args.LocationName);
args.SetNewValue(Activator.CreateInstance(t));
}
else throw new InvalidOperationException(string.Format("The property {0} (type {1}) has no default constructor and must either be provided with a default value or have the [Initialize] attribute removed", args.LocationFullName, t));
}
}
//Console.WriteLine("Before get called. Current value is |{0}|", args.GetCurrentValue());
args.ProceedGetValue();
//Console.WriteLine("After get called. Current value is |{0}|", args.Value);
}
void LazyLoadValueFromDatabase(LocationInterceptionArgs args, LazyEntity lazyEntity)
{
lock (_writeLock) {
args.ProceedGetValue();
if (AlreadyLoaded)
{
return;
}
if (IsValueAlreadySpecified(args))
{
AlreadyLoaded = true;
return;
}
if (lazyEntity.Read == null)
{
AlreadyLoaded = true; //?if Read callback is null - it means that entity was created by the client code, and not was getted from db, so it's not persisted at all.
return;
}
var value = GetValueFor(args, lazyEntity, lazyEntity.Read);
args.SetNewValue(value);
AlreadyLoaded = true;
args.ProceedGetValue();
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
if (this.isFetched)
{
args.ProceedGetValue();
return;
}
else
{
this.isFetched = true;
var stringValue = ConfigurationManager.AppSettings[this.settingName];
if (!string.IsNullOrEmpty(stringValue))
{
var value = Convert.ChangeType(stringValue, args.Location.LocationType);
args.SetNewValue(value);
args.Value = value;
}
else
{
args.ProceedGetValue();
}
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
if (this.isFetched)
{
args.ProceedGetValue();
return;
}
else
{
this.isFetched = true;
Console.WriteLine("Reading from registry");
string stringValue = Registry.GetValue(this.keyName, this.valueName, null) as string;
if (stringValue != null )
{
object value = Convert.ChangeType(stringValue, args.Location.LocationType);
args.SetNewValue(value);
args.Value = value;
}
else
{
args.ProceedGetValue();
}
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
if (args.GetCurrentValue() == null)
{
args.SetNewValue(_value);
}
args.ProceedGetValue();
}
public override void OnGetValue(LocationInterceptionArgs args)
{
args.ProceedGetValue();
if (args.Value != null)
{
return;
}
args.SetNewValue(Activator.CreateInstance(type));
args.ProceedGetValue();
}
public override void OnGetValue(LocationInterceptionArgs args)
{
base.OnGetValue(args);
if (args.Value == null)
{
var obj = ((Node)args.Instance).GetNode(Path ?? args.LocationName);
args.SetNewValue(obj);
args.Value = obj;
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
args.ProceedGetValue(); // this actually fetches the field and populates the args.Value
if (args.Value == null)
{
var activity = args.Instance as Activity;
if (activity == null) throw new ArgumentException("LazyViewAttribute can only be used within Activities");
args.SetNewValue(activity.FindViewById(_viewId));
args.ProceedGetValue();
}
}
/// <summary>
/// Called on 'get' of the field or property, when it is the first 'get', and there was no 'set' before this get,
/// we will return 'our' value
/// </summary>
public override void OnGetValue(LocationInterceptionArgs args)
{
if (_isInitialized)
{
args.ProceedGetValue();
return;
}
args.SetNewValue(Value); // store the value using the property its setter
args.ProceedGetValue(); // then proceed the 'get' as usual
}
/// <inheritdoc />
public sealed override void OnSetValue(LocationInterceptionArgs args)
{
var newValue = args.Value;
var oldValue = args.GetCurrentValue();
if (Equals(newValue, oldValue))
{
return;
}
args.SetNewValue(newValue);
ReactiveManager.WasChanged(new CompositeReactiveObject(args.Instance, property));
}
public override void OnGetValue(LocationInterceptionArgs args)
{
if (!_fetchedFromRegistry)
{
var value = Registry.GetValue(KeyName, ValueName, DefaultValue);
args.SetNewValue(value);
args.Value = value;
}
else
{
args.ProceedGetValue();
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
args.ProceedGetValue(); // this actually fetches the field and populates the args.Value
if (args.Value == null)
{
var activity = args.Instance as Activity;
if (activity == null)
{
throw new ArgumentException("LazyViewAttribute can only be used within Activities");
}
args.SetNewValue(activity.FindViewById(_viewId));
args.ProceedGetValue();
}
}
public override void OnGetValue( LocationInterceptionArgs args )
{
var instance = args.Instance ?? args.Location.PropertyInfo.DeclaringType;
var apply = Apply( instance, args.Location.PropertyInfo );
if ( apply )
{
var parameter = new DefaultValueParameter( instance, args.Location.PropertyInfo );
var value = source( parameter );
args.SetNewValue( args.Value = value );
}
else
{
base.OnGetValue( args );
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
var form = (UserForm)args.Instance; // this form is only used here to write to a listbox for demonstration
args.ProceedGetValue();
if (args.Value == null)
{
form.LogListBox.Items.Add("Instantiating UserService");
args.SetNewValue(Activator.CreateInstance(_type));
args.ProceedGetValue();
}
else
{
form.LogListBox.Items.Add("Using a UserService that has already been created");
}
}
/// <inheritdoc/>
public sealed override void OnSetValue(LocationInterceptionArgs args)
{
// ReSharper disable once ConditionIsAlwaysTrueOrFalse
if (this == null) //This is because of the case in TestPropertyAccessDuringConstructionReflection
{
args.ProceedSetValue();
return;
}
var newValue = args.Value;
var oldValue = args.GetCurrentValue();
if (Equals(newValue, oldValue))
{
return;
}
args.SetNewValue(newValue);
ReactiveManager.WasChanged(this);
}
public override void OnSetValue(LocationInterceptionArgs args)
{
args.SetNewValue(args.Value);
var instance = (INotifyPropertyChangedImplementor)args.Instance;
instance.RaisePropertyChanged(args.LocationName);
foreach (var dependentProperty in _DependentProperties)
{
if (typeof(IMPCommand).IsAssignableFrom(dependentProperty.PropertyType))
{
(args.Instance.GetType().GetProperty(dependentProperty.PropertyName)
.GetValue(args.Instance) as IMPCommand).ChangeCanExecute();
}
else
{
instance.RaisePropertyChanged(dependentProperty.PropertyName);
}
}
args.ProceedSetValue();
}
void InitializeCollectionPropertyWithEmptyCollection(LocationInterceptionArgs args)
{
lock (_writeLock) {
args.ProceedGetValue();
if (AlreadyLoaded)
{
return;
}
if (args.Value != null)
{
return;
}
var targetCollection = Activator.CreateInstance(TargetCollectionType);
args.SetNewValue(targetCollection);
args.ProceedGetValue();
}
}
public override sealed void OnGetValue(LocationInterceptionArgs args)
{
args.ProceedGetValue();
if (args.Value == null) // lazy loading
{
var context = args.Instance as Context;
if(context == null) throw new Exception("The IoC Aspect can only be used on a field within an Activity (or Context) object");
ResolveContextDependency((Context)args.Instance);
var dependencyType = args.Location.LocationType;
var instantiation = ServiceLocator.Get(dependencyType);
if (instantiation != null)
{
args.SetNewValue(instantiation);
}
args.ProceedGetValue();
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
var form = (ProductForm)args.Instance; // this form is only used here to write to a listbox for demonstration
args.ProceedGetValue(); // this actually fetches the field and populates the args.Value
if (args.Value == null)
{
form.LogListBox.Items.Add("Instantiating ProductService");
var locationType = args.Location.LocationType;
var instantiation = ObjectFactory.GetInstance(locationType);
if (instantiation != null)
{
args.SetNewValue(instantiation);
}
args.ProceedGetValue();
}
else
{
form.LogListBox.Items.Add("Using a ProductService that has already been instantiated");
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
if (isFetched)
{
args.ProceedGetValue();
}
else
{
isFetched = true;
var stringValue = Registry.GetValue(keyFullName, valueName, null) as string;
if (stringValue != null)
{
var value = Convert.ChangeType(stringValue, args.Location.LocationType);
args.SetNewValue(value);
args.Value = value;
}
else
{
args.ProceedGetValue();
}
}
}
public sealed override void OnGetValue(LocationInterceptionArgs args)
{
args.ProceedGetValue();
if (args.Value == null) // lazy loading
{
var context = args.Instance as Context;
if (context == null)
{
throw new Exception("The IoC Aspect can only be used on a field within an Activity (or Context) object");
}
ResolveContextDependency((Context)args.Instance);
var dependencyType = args.Location.LocationType;
var instantiation = ServiceLocator.Get(dependencyType);
if (instantiation != null)
{
args.SetNewValue(instantiation);
}
args.ProceedGetValue();
}
}
public override void OnGetValue(LocationInterceptionArgs args)
{
var eb = ((IEntityBase)args.Instance);
args.SetNewValue(eb.Extensions.GetTypeSafe <string>());
}
/// <summary>
/// </summary>
/// <param name="args"></param>
public override void OnSetValue(LocationInterceptionArgs args)
{
args.SetNewValue(string.Intern((string)args.Value));
}
/// <summary>
/// Called on 'get' of the field or property, when it is the first 'get', and there was no 'set' before this get,
/// we will return 'our' value
/// </summary>
public override void OnGetValue(LocationInterceptionArgs args)
{
if (_isInitialized)
{
args.ProceedGetValue();
return;
}
args.SetNewValue(Value); // store the value using the property its setter
args.ProceedGetValue(); // then proceed the 'get' as usual
}
