Package org.h2.util.geometry

Class GeometryUtils.Target

java.lang.Object
org.h2.util.geometry.GeometryUtils.Target
Direct Known Subclasses:
EWKBUtils.EWKBTarget, EWKTUtils.EWKTTarget, GeoJsonUtils.GeoJsonTarget, GeometryUtils.DimensionSystemTarget, GeometryUtils.EnvelopeTarget, JTSUtils.GeometryTarget
Enclosing class:
GeometryUtils
public abstract static class GeometryUtils.Target extends Object
Converter output target.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Target()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    protected abstract void
    addCoordinate(double x, double y, double z, double m, int index, int total)
    Invoked to add a coordinate to a geometry.
    protected void
    dimensionSystem(int dimensionSystem)
    Invoked to add dimension system requirement.
    protected void
    endCollectionItem(GeometryUtils.Target target, int type, int index, int total)
    Invoked after writing of a collection item.
    protected void
    endNonEmptyPolygon()
    Invoked after writing of non-empty POLYGON.
    protected void
    endObject(int type)
    Invoked after writing of the object.
    protected void
    init(int srid)
    Initializes top-level target.
    protected void
    startCollection(int type, int numItems)
    Invoked before writing of a collection.
    protected GeometryUtils.Target
    startCollectionItem(int index, int total)
    Invoked before writing of a collection item.
    protected void
    startLineString(int numPoints)
    Invoked before writing a LINESTRING.
    protected void
    startPoint()
    Invoked before writing a POINT.
    protected void
    startPolygon(int numInner, int numPoints)
    Invoked before writing a POLYGON.
    protected void
    startPolygonInner(int numInner)
    Invoked before writing an inner polygon in POLYGON.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Target

      public Target()

  • Method Details

    • init

      protected void init(int srid)
      Initializes top-level target.
      Parameters:
      srid - SRID

    • dimensionSystem

      protected void dimensionSystem(int dimensionSystem)
      Invoked to add dimension system requirement.
      Parameters:
      dimensionSystem - dimension system

    • startPoint

      protected void startPoint()
      Invoked before writing a POINT.

    • startLineString

      protected void startLineString(int numPoints)
      Invoked before writing a LINESTRING.
      Parameters:
      numPoints - number of points in line string

    • startPolygon

      protected void startPolygon(int numInner, int numPoints)
      Invoked before writing a POLYGON. If polygon is empty, both parameters are 0.
      Parameters:
      numInner - number of inner polygons
      numPoints - number of points in outer polygon

    • startPolygonInner

      protected void startPolygonInner(int numInner)
      Invoked before writing an inner polygon in POLYGON.
      Parameters:
      numInner - number of points in inner polygon

    • endNonEmptyPolygon

      protected void endNonEmptyPolygon()
      Invoked after writing of non-empty POLYGON.

    • startCollection

      protected void startCollection(int type, int numItems)
      Invoked before writing of a collection.
      Parameters:
      type - type of collection, one of GeometryUtils.MULTI_POINT, GeometryUtils.MULTI_LINE_STRING, GeometryUtils.MULTI_POLYGON, GeometryUtils.GEOMETRY_COLLECTION
      numItems - number of items in this collection

    • startCollectionItem

      protected GeometryUtils.Target startCollectionItem(int index, int total)
      Invoked before writing of a collection item.
      Parameters:
      index - 0-based index of this item in the collection
      total - total number of items in the collection
      Returns:
      output target that should be used for processing of this collection item. May return this target or an custom sub-target.

    • endCollectionItem

      protected void endCollectionItem(GeometryUtils.Target target, int type, int index, int total)
      Invoked after writing of a collection item. This method is invoked on the same target that was used for startCollectionItem(int, int).
      Parameters:
      target - the result of startCollectionItem(int, int)
      type - type of collection
      index - 0-based index of this item in the collection
      total - total number of items in the collection

    • endObject

      protected void endObject(int type)
      Invoked after writing of the object.
      Parameters:
      type - type of the object

    • addCoordinate

      protected abstract void addCoordinate(double x, double y, double z, double m, int index, int total)
      Invoked to add a coordinate to a geometry.
      Parameters:
      x - X coordinate
      y - Y coordinate
      z - Z coordinate (NaN if not used)
      m - M coordinate (NaN if not used)
      index - 0-based index of coordinate in the current sequence
      total - total number of coordinates in the current sequence