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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | 1x 1x 1x 1234x 1008x 504x 504x 1008x 1008x | import DeveloperError from "../Core/DeveloperError.js";
/**
* Defines the interface for data sources, which turn arbitrary data into a
* {@link EntityCollection} for generic consumption. This object is an interface
* for documentation purposes and is not intended to be instantiated directly.
* @alias DataSource
* @constructor
*
* @see Entity
* @see DataSourceDisplay
*/
function DataSource() {
DeveloperError.throwInstantiationError();
}
Object.defineProperties(DataSource.prototype, {
/**
* Gets a human-readable name for this instance.
* @memberof DataSource.prototype
* @type {string}
*/
name: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets the preferred clock settings for this data source.
* @memberof DataSource.prototype
* @type {DataSourceClock}
*/
clock: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets the collection of {@link Entity} instances.
* @memberof DataSource.prototype
* @type {EntityCollection}
*/
entities: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets a value indicating if the data source is currently loading data.
* @memberof DataSource.prototype
* @type {boolean}
*/
isLoading: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets an event that will be raised when the underlying data changes.
* @memberof DataSource.prototype
* @type {Event}
*/
changedEvent: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets an event that will be raised if an error is encountered during processing.
* @memberof DataSource.prototype
* @type {Event<function(this, RequestErrorEvent)>}
*/
errorEvent: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets an event that will be raised when the value of isLoading changes.
* @memberof DataSource.prototype
* @type {Event<function(this, boolean)>}
*/
loadingEvent: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets whether or not this data source should be displayed.
* @memberof DataSource.prototype
* @type {boolean}
*/
show: {
get: DeveloperError.throwInstantiationError,
},
/**
* Gets or sets the clustering options for this data source. This object can be shared between multiple data sources.
*
* @memberof DataSource.prototype
* @type {EntityCluster}
*/
clustering: {
get: DeveloperError.throwInstantiationError,
},
});
/**
* Updates the data source to the provided time. This function is optional and
* is not required to be implemented. It is provided for data sources which
* retrieve data based on the current animation time or scene state.
* If implemented, update will be called by {@link DataSourceDisplay} once a frame.
*
* @param {JulianDate} time The simulation time.
* @returns {boolean} True if this data source is ready to be displayed at the provided time, false otherwise.
*/
DataSource.prototype.update = function (time) {
DeveloperError.throwInstantiationError();
};
/**
* @private
*/
DataSource.setLoading = function (dataSource, isLoading) {
if (dataSource._isLoading !== isLoading) {
if (isLoading) {
dataSource._entityCollection.suspendEvents();
} else {
dataSource._entityCollection.resumeEvents();
}
dataSource._isLoading = isLoading;
dataSource._loading.raiseEvent(dataSource, isLoading);
}
};
export default DataSource;
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