EntityCollection

Members

readonlycollectionChanged : Event

DataSources/EntityCollection.js 115

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

readonlyid : String

DataSources/EntityCollection.js 126

Gets a globally unique identifier for this collection.

readonlyowner : DataSource|CompositeEntityCollection

DataSources/EntityCollection.js 149

Gets the owner of this entity collection, ie. the data source or composite entity collection which created it.

readonlyvalues : Array.<Entity>

DataSources/EntityCollection.js 138

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

Methods

staticCesium.EntityCollection.collectionChangedEventCallback(collection, added, removed, changed)

DataSources/EntityCollection.js 105

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.

add(entity) → Entity

DataSources/EntityCollection.js 202

Add an entity to the collection.

Name	Type	Description
entity	Entity	The entity to be added.

Returns:

The entity that was added.

Throws:

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

computeAvailability() → TimeInterval

DataSources/EntityCollection.js 164

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.

contains(entity) → Boolean

DataSources/EntityCollection.js 250

Returns true if the provided entity is in this collection, false otherwise.

Name	Type	Description
entity	Entity	The entity.

Returns:

true if the provided entity is in this collection, false otherwise.

getById(id) → Entity

DataSources/EntityCollection.js 322

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.

getOrCreateEntity(id) → Entity

DataSources/EntityCollection.js 338

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.

remove(entity) → Boolean

DataSources/EntityCollection.js 237

Removes an entity from the collection.

Name	Type	Description
entity	Entity	The entity to be removed.

Returns:

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

removeAll()

DataSources/EntityCollection.js 290

Removes all Entities from the collection.

removeById(id) → Boolean

DataSources/EntityCollection.js 265

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.

resumeEvents()

DataSources/EntityCollection.js 85

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.

suspendEvents()

DataSources/EntityCollection.js 72

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.