Package com.esri.core.geometry

Class ListeningGeometryCursor

  • public final class ListeningGeometryCursor
extends GeometryCursor
    A GeometryCursor implementation that allows pushing geometries into it. To be used with aggregating operations, OperatorUnion and OperatorConvexHull, when the geometries are not available at the time of the execute method call, but are coming in a stream.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) java.util.LinkedList<Geometry> m_geomList  
      (package private) int m_index  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int getGeometryID()
      Returns the ID of the current geometry.
      Geometry next()
      Moves the cursor to the next Geometry.
      void tick​(Geometry geom)
      Call this method to add geometry to the cursor.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Field Detail

      • m_geomList

        java.util.LinkedList<Geometry> m_geomList

      • m_index

        int m_index

    • Constructor Detail

      • ListeningGeometryCursor

        public ListeningGeometryCursor()

    • Method Detail

      • getGeometryID

        public int getGeometryID()
        Description copied from class: GeometryCursor
        Returns the ID of the current geometry. The ID is propagated across the operations (when possible). Returns an ID associated with the current Geometry. The ID is passed along and is returned by some operators to preserve relationship between the input and output geometry classes. It is not always possible to preserve an ID during an operation.
        Specified by:
        getGeometryID in class GeometryCursor

      • next

        public Geometry next()
        Description copied from class: GeometryCursor
        Moves the cursor to the next Geometry. Returns null when reached the end. The behavior of the cursor is undefined after the method returns null.
        Specified by:
        next in class GeometryCursor

      • tick

        public void tick​(Geometry geom)
        Call this method to add geometry to the cursor. After this method is called, call immediately the tock() method on the GeometryCursor returned by the OperatorUnion (or OperatorConvexHull with b_merge == true). Call next() on the GeometryCursor returned by the OperatorUnion when done listening to incoming geometries to finish the union operation.
        Parameters:
        geom - The geometry to be pushed into the cursor.