TraceLocation | API Reference | ArcGIS Maps SDK for JavaScript 4.31

To perform the trace analytic, users can optionally supply a list of locations in forms of globalIds (UUID) and terminals. These locations indicate where should the trace start (also known as starting points) and where should it end (barriers) Starting locations can be applied to all network sources.

See also

trace

Constructors

TraceLocation Constructor new TraceLocation(properties)

Parameter

properties Object

optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Watch for changes topic.

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Type	Summary	Class
String	The name of the class.	Accessor
String	The globalId (UUID) of the feature to start or stop the trace.	TraceLocation
Boolean	This indicates whether this barrier starting location should be skipped (filtered) when a trace attempts to find upstream controllers.	TraceLocation
Number	This double parameter of value of 0-1 indicates a percentage along the line of where the trace location is placed.	TraceLocation
Number	The terminal Id to place the starting location at.	TraceLocation
String	The type of the trace location; `starting-point` defines where the trace should start and `barrier` defines where the trace should stop.	TraceLocation

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

The name of the class. The declared class name is formatted as esri.folder.className.

globalId Property globalId String

The globalId (UUID) of the feature to start or stop the trace.

isFilterBarrier Property isFilterBarrier Boolean

This indicates whether this barrier starting location should be skipped (filtered) when a trace attempts to find upstream controllers. Setting this to false will stop the trace if it encounters this barrier. When to set to true, the trace will momenterily skip the barrier to find any upstream controllers and will filter out the output accordingly. Applicable subnetwork-based trace types only.

Default Value:false

percentAlong Property percentAlong Number

This double parameter of value of 0-1 indicates a percentage along the line of where the trace location is placed. Applicable to line features only.

Example

Line feature with objectId 100 with 2 midspan junctions (j1,j2). The line feature has 3 edge network elements
F-j1, j1-j2 and j2-T.

                                       OID=100
                               F------j1------j2------T

F-j1  (objectId=100, positionFrom=0, positionTo=0.33)
j1-j2 (objectId=100, positionFrom=0.33, positionTo=0.66)
j2-T  (objectId=100, positionFrom=0.66, positionTo=1)

When percentAlong is 0.5 (50%) the starting location will be placed on the middle edge (j1-j2)

                                       OID=100
                               F------j1---x--j2------T

When percentAlong is 0.1 (10%) the starting location will be placed on the first edge (F-j1)

                                       OID=100
                               F-x----j1------j2------T

terminalId Property terminalId Number

The terminal Id to place the starting location at. Applicable for junction/device sources only. Users can use getTerminalConfiguration() in UtilityNetwork to get the terminal.

See also

Terminal

type Property type String

The type of the trace location; starting-point defines where the trace should start and barrier defines where the trace should stop.

Possible Values:"starting-point" |"barrier"

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
*	Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.	TraceLocation
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor
Object	Converts an instance of this class to its ArcGIS portal JSON representation.	TraceLocation

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 4.25.

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

fromJSON Method fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter

json Object

A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, hasHandles added at 4.25.

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, removeHandles added at 4.25.

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

toJSON Method toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.