How to retrive specifc Layer from Here Map JS? - here-api

Question

I add DataPoints into Provider then into Layer which is bundled into the map.
Later I want to edit some of DataPoints, to do this I need to retrieve layer then provider from the map.
I try it by getting an array of layers but I won't know which one is a layer with my dataPoints.
let clusterDataProvider = new H.clustering.Provider(dataPoints, {
clusteringOptions: {
eps: 16,
minWeight: 2,
strategy: H.clustering.Provider.Strategy.GRID
},
theme: {
getClusterPresentation: this.getClusterPresentation,
getNoisePresentation: this.getNoisePresentation
}
})
}),
let layer = hereMap.getLayers().asArray().find(layer => layer instanceof H.map.layer.ObjectLayer)
if(!layer) {
layer = new H.map.layer.ObjectLayer(clusterDataProvider)
hereMap.addLayer(layer, 0);
}
layer.getProvider()
But ofc there can be a lot of ObjectLayers in my map, so how can I recognize which one is that with clusterDataProvider.
Or anyone has a better idea of how to edit a specific layer or cluster provider?

Answer 1

You can retrieve the layer by utilize this code:
function findClusterLayer(hereMap){
let layer = hereMap.getLayers().asArray().find(layer => {
let isObjLayer = layer instanceof H.map.layer.ObjectLayer;
return isObjLayer && (layer.getProvider() instanceof H.clustering.Provider);
});
return layer;
}
Unfortunately, you can't get dataPoints nor from layer nor from cluster provider, use please workaround like this:
var clusteringLayer = new H.map.layer.ObjectLayer(clusteredDataProvider);
clusteringLayer.$data = dataPoints;
later you can get datapoints like this:
var layer = findClusterLayer(map);
var dataPoints = layer.$data;
after changing some datapoints save it to cluster:
clusteredDataProvider.setDataPoints(dataPoints);
See please complete example
BTW: you can save some object into every datapoint see please documentation on https://developer.here.com/documentation/maps/3.1.20.0/api_reference/H.clustering.DataPoint.html#data