[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

The merge view works together with a group view that splits the data in a stream to multiple subviews, based on a key index. Every group view requires a merge view to merge the many subviews back into a single view. Typically the last view in a chain containing a group view is a merge view. The merge view has no other responsibility then becoming the single last instance in the chain to which external listeners for updates can be attached to receive updates for the many subviews that have this merge view as common child views. The parent view of this view is generally the AddPropertyValueView that adds the grouped-by information back into the data.

The following tables list the members exposed by the MergeView type.

Public Methods

  NameDescription
AddParentView
Add a parent data merge view.

AddView
Add a view to the viewable object.
(Inherited from ViewSupport.)
AttachesTo
Return null if the view will accept being attached to a particular object.
(Overrides .AttachesTo(Viewable).)
Equals (Inherited from Object.)
GetEnumerator
Returns an enumerator that iterates through the collection.
(Overrides .GetEnumerator().)
GetHashCode (Inherited from Object.)
GetType (Inherited from Object.)
GetViews
Returns all added views.
(Inherited from ViewSupport.)
RemoveView
Remove a view.
(Inherited from ViewSupport.)
ToString
Returns a String that represents the current Object.
(Overrides .ToString().)
Update
Notify that data has been added or removed from the Viewable parent. The last object in the newData array of objects would be the newest object added to the parent view. The first object of the oldData array of objects would be the oldest object removed from the parent view.

If the call to update contains new (inserted) data, then the first argument will be a non-empty list and the second will be empty. Similarly, if the call is a notification of deleted data, then the first argument will be empty and the second will be non-empty. Either the newData or oldData will be non-null. This method won't be called with both arguments being null, but either one could be null. The same is true for zero-length arrays. Either newData or oldData will be non-empty. If both are non-empty, then the update is a modification notification.

When update() is called on a view by the parent object, the data in newData will be in the collection of the parent, and its data structures will be arranged to reflect that. The data in oldData will not be in the parent's data structures, and any access to the parent will indicate that that data is no longer there.

(Overrides .Update(EventBean[](), EventBean[]()).)

Protected Methods

  NameDescription
Finalize (Inherited from Object.)
MemberwiseClone (Inherited from Object.)

Protected Fields

  NameDescription
parent
Parent viewable to this view - directly accessible by subclasses.
(Inherited from ViewSupport.)

Public Constructors

  NameDescription
MergeViewNewOverloaded.

Public Properties

  NameDescription
EventType
Provides metadata information about the type of object the event collection contains.
(Overrides .EventType.)
GroupFieldNames
Gets or sets the field name that contains the values to group by.

GroupFieldType
Sets types of fields used in the group-by.

GroupFieldTypes
Returns types of fields used in the group-by.

HasViews
Test is there are any views to the Viewable.
(Inherited from ViewSupport.)
Id
Gets the unique id for the view
(Inherited from ViewSupport.)
Parent
Gets or sets the View's parent Viewable.
(Inherited from ViewSupport.)
ParentAware
Sets a flag indicating that the view must couple to parent views.

ViewServiceContext
Gets or sets the context instances used by the view.

Explicit Interface Implementations

  NameDescription
Explicit interface implemetationIEnumerable.System.Collections.IEnumerable.GetEnumerator
Returns an enumerator that iterates through a collection.
(Inherited from ViewSupport.)