Class ObservableAggregate<TSource, TAccumulator, TResult>

Denotes an abstract class for an aggregator incrementalization

Inheritance
object
NotifyValue<TResult>
ObservableAggregate<TSource, TAccumulator, TResult>
Implements
INotifyValue<TResult>
Inherited Members
Namespace: NMF.Expressions.Linq
Assembly: NMF.Expressions.Linq.dll
Syntax
public abstract class ObservableAggregate<TSource, TAccumulator, TResult> : NotifyValue<TResult>, INotifyValue<TResult>, INotifiable, IDisposable, ISuccessorList, IValueChangedNotificationResult<TResult>, IValueChangedNotificationResult, INotificationResult
Type Parameters
Name Description
TSource

The source type of elements
TAccumulator

The accumulator used
TResult

The result type

Constructors

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ObservableAggregate(INotifyEnumerable<TSource>, TAccumulator)

Creates a new instance

Declaration
protected ObservableAggregate(INotifyEnumerable<TSource> source, TAccumulator accumulator)
Parameters
Type Name Description
INotifyEnumerable<TSource> source

The incrementalized source collection
TAccumulator accumulator

The initial value for the accumulator
Exceptions
Type Condition
ArgumentNullException

Thrown if source is null

Properties

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Accumulator

Gets the current accumulator

Declaration
protected TAccumulator Accumulator { get; set; }
Property Value
Type Description
TAccumulator
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Dependencies

Nodes that notify this node.

Declaration
public override IEnumerable<INotifiable> Dependencies { get; }
Property Value
Type Description
IEnumerable<INotifiable>
Overrides
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Source

Gets the source collection

Declaration
protected INotifyEnumerable<TSource> Source { get; }
Property Value
Type Description
INotifyEnumerable<TSource>

Methods

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AddItem(TSource)

Adds the given item

Declaration
protected abstract void AddItem(TSource item)
Parameters
Type Name Description
TSource item

the item
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Attach()

Declaration
protected override void Attach()
Overrides
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Detach()

Declaration
protected override void Detach()
Overrides
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Notify(IList<INotificationResult>)

Gets called when one of the dependencies signals a notification.

Declaration
public override INotificationResult Notify(IList<INotificationResult> sources)
Parameters
Type Name Description
IList<INotificationResult> sources

Contains information about what triggered this notification.
Returns
Type Description
INotificationResult

An object describing the changes that happened in this notification.
Overrides
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RemoveItem(TSource)

Removes the given item

Declaration
protected abstract void RemoveItem(TSource item)
Parameters
Type Name Description
TSource item

the item
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ResetAccumulator()

Resets the accumulator

Declaration
protected abstract void ResetAccumulator()

Implements

Extension Methods