EntityCollection

Members

readonlycollectionChanged :Event

Gets the event that is fired when entities are added or removed from the collection. The generated event is a EntityCollection.collectionChangedEventCallback.

Source: DataSources/EntityCollection.js, line 108

readonlyentities :Array.<Entity>

Gets the array of Entity instances in the collection. This array should not be modified directly.

Source: DataSources/EntityCollection.js, line 131

readonlyid :String

Gets a globally unique identifier for this collection.

Source: DataSources/EntityCollection.js, line 119

Methods

staticEntityCollection.collectionChangedEventCallback(collection, added, removed, changed)

The signature of the event generated by EntityCollection#collectionChanged.

Name	Type	Description
collection	EntityCollection	The collection that triggered the event.
added	Array.<Entity>	The array of Entity instances that have been added to the collection.
removed	Array.<Entity>	The array of Entity instances that have been removed from the collection.
changed	Array.<Entity>	The array of Entity instances that have been modified.

Source: DataSources/EntityCollection.js, line 98

add(entity)

Add an entity to the collection.

Name	Type	Description
entity	Entity	The entity to be added.

Throws:

• DeveloperError : An entity with already exists in this collection.

Source: DataSources/EntityCollection.js, line 183

computeAvailability() → TimeInterval

Computes the maximum availability of the entities in the collection. If the collection contains a mix of infinitely available data and non-infinite data, it will return the interval pertaining to the non-infinite data only. If all data is infinite, an infinite interval will be returned.

Returns:

The availability of entities in the collection.

Source: DataSources/EntityCollection.js, line 146

getById(id) → Entity

Gets an entity with the specified id.

Name	Type	Description
id	Object	The id of the entity to retrieve.

Returns:

The entity with the provided id or undefined if the id did not exist in the collection.

Source: DataSources/EntityCollection.js, line 288

getOrCreateEntity(id) → Entity

Gets an entity with the specified id or creates it and adds it to the collection if it does not exist.

Name	Type	Description
id	Object	The id of the entity to retrieve or create.

Returns:

The new or existing object.

Source: DataSources/EntityCollection.js, line 304

remove(entity) → Boolean

Removes an entity from the collection.

Name	Type	Description
entity	Entity	The entity to be added.

Returns:

true if the item was removed, false if it did not exist in the collection.

Source: DataSources/EntityCollection.js, line 213

removeAll()

Removes all Entities from the collection.

Source: DataSources/EntityCollection.js, line 256

removeById(id) → Boolean

Removes an entity with the provided id from the collection.

Name	Type	Description
id	Object	The id of the entity to remove.

Returns:

true if the item was removed, false if no item with the provided id existed in the collection.

Source: DataSources/EntityCollection.js, line 229

resumeEvents()

Resumes raising EntityCollection#collectionChanged events immediately when an item is added or removed. Any modifications made while while events were suspended will be triggered as a single event when this function is called. This function is reference counted and can safely be called multiple times as long as there are corresponding calls to EntityCollection#resumeEvents.

Throws:

• DeveloperError : resumeEvents can not be called before suspendEvents.

Source: DataSources/EntityCollection.js, line 78

suspendEvents()

Prevents EntityCollection#collectionChanged events from being raised until a corresponding call is made to EntityCollection#resumeEvents, at which point a single event will be raised that covers all suspended operations. This allows for many items to be added and removed efficiently. This function can be safely called multiple times as long as there are corresponding calls to EntityCollection#resumeEvents.

Source: DataSources/EntityCollection.js, line 65