Module com.esri.arcgisruntime
Package com.esri.arcgisruntime.geometry

Class Segment

java.lang.Object
com.esri.arcgisruntime.geometry.Segment
Direct Known Subclasses:
CubicBezierSegment, EllipticArcSegment, LineSegment
public abstract class Segment extends Object
A segment represents an edge of a multipart geometry, connecting a start to an end point.

A segment describes a continuous line between a start location and an end location. ArcGIS software supports both linear segments (represented by LineSegment) and curve segments (represented by CubicBezierSegment and EllipticArcSegment).

GeometryEngine.densify(Geometry, double) can translate curve segments into multiple LineSegment instances to approximate the curve.

Every ImmutablePart in a Multipart geometry is a collection of Segment instances, where the end of one segment is at exactly the same location as the start of the following segment. Multipart geometries can be composed from and decomposed into their constituent segments if required.

Because a single location is shared by adjacent segments, a single Point object is used to represent the shared location when you iterate through the points in a part. As a result, when iterating through the points in a part of a polyline or polygon, there will be one more point than the number of segments in that same part.

Segments are immutable so you cannot change a segment's shape once it is created. For workflows that involve geometry editing, create a new segment with the properties you require.

From v100.12, curve segments are supported in geometry editing workflows. You can add curve segments to a MultipartBuilder, and if a geometry has curves (Geometry.hasCurves() is true) then curve segments will be returned where applicable from the ImmutablePart collections that comprise the multipart geometry. Curve and linear segments can be mixed together in the same geometry.

Like the geometries they comprise, a Segment is immutable.

Since:
100.0.0

  • Method Details

    • getStartPoint

      public Point getStartPoint()
      Gets a Point representing the start of this Segment.
      Returns:
      the start point
      Since:
      100.0.0

    • getEndPoint

      public Point getEndPoint()
      Gets a Point representing the end of this Segment.
      Returns:
      the end point
      Since:
      100.0.0

    • getSpatialReference

      public SpatialReference getSpatialReference()
      Gets the SpatialReference of this Segment.
      Returns:
      the SpatialReference of this Segment.
      Since:
      100.0.0

    • isCurve

      public boolean isCurve()
      Indicates if this Segment is curved. Prior to v100.12, only LineSegment instances were supported when creating new geometries using a MultipartBuilder or iterating the Segment instances in an existing Multipart geometry.

      From v100.12, you can add curve segments when using a MultipartBuilder, and get them back from an existing Multipart geometry when Geometry.hasCurves() is true.

      Returns:
      false if the object is a LineSegment; true otherwise
      Since:
      100.10.0
      See Also:

    • isClosed

      public boolean isClosed()
      Indicates if this segment is closed, that is it has a matching start and end point.
      Returns:
      true if the segment is closed, false otherwise
      Since:
      100.0.0