Package org.locationtech.spatial4j.shape.impl

Class RectangleImpl

java.lang.Object
org.locationtech.spatial4j.shape.BaseShape<SpatialContext>
org.locationtech.spatial4j.shape.impl.RectangleImpl
All Implemented Interfaces:
Rectangle, Shape
public class RectangleImpl extends BaseShape<SpatialContext> implements Rectangle
A simple Rectangle implementation that also supports a longitudinal wrap-around. When minX > maxX, this will assume it is world coordinates that cross the date line using degrees. Immutable & threadsafe.

  • Field Details

    • minX

      private double minX

    • maxX

      private double maxX

    • minY

      private double minY

    • maxY

      private double maxY

  • Constructor Details

    • RectangleImpl

      public RectangleImpl(double minX, double maxX, double minY, double maxY, SpatialContext ctx)
      A simple constructor without normalization / validation.

    • RectangleImpl

      public RectangleImpl(Point lowerLeft, Point upperRight, SpatialContext ctx)
      A convenience constructor which pulls out the coordinates.

    • RectangleImpl

      public RectangleImpl(Rectangle r, SpatialContext ctx)
      Copy constructor.

  • Method Details

    • reset

      public void reset(double minX, double maxX, double minY, double maxY)
      Description copied from interface: Rectangle
      Expert: Resets the state of this shape given the arguments. This is a performance feature to avoid excessive Shape object allocation as well as some argument error checking. Mutable shapes is error-prone so use with care.
      Specified by:
      reset in interface Rectangle

    • isEmpty

      public boolean isEmpty()
      Description copied from interface: Shape
      Shapes can be "empty", which is to say it exists nowhere. The underlying coordinates are typically NaN.
      Specified by:
      isEmpty in interface Shape

    • getBuffered

      public Rectangle getBuffered(double distance, SpatialContext ctx)
      Description copied from interface: Shape
      Returns a buffered version of this shape. The buffer is usually a rounded-corner buffer, although some shapes might buffer differently. This is an optional operation.
      Specified by:
      getBuffered in interface Shape
      Returns:
      Not null, and the returned shape should contain the current shape.

    • hasArea

      public boolean hasArea()
      Description copied from interface: Shape
      Does the shape have area? This will be false for points and lines. It will also be false for shapes that normally have area but are constructed in a degenerate case as to not have area (e.g. a circle with 0 radius or rectangle with no height or no width).
      Specified by:
      hasArea in interface Shape

    • getArea

      public double getArea(SpatialContext ctx)
      Description copied from interface: Shape
      Calculates the area of the shape, in square-degrees. If ctx is null then simple Euclidean calculations will be used. This figure can be an estimate.
      Specified by:
      getArea in interface Shape

    • getCrossesDateLine

      public boolean getCrossesDateLine()
      Description copied from interface: Rectangle
      Only meaningful for geospatial contexts.
      Specified by:
      getCrossesDateLine in interface Rectangle

    • getHeight

      public double getHeight()
      Description copied from interface: Rectangle
      The height. In geospatial contexts, this is in degrees latitude. It will always be >= 0.
      Specified by:
      getHeight in interface Rectangle

    • getWidth

      public double getWidth()
      Description copied from interface: Rectangle
      The width. In geospatial contexts, this is generally in degrees longitude and is aware of the dateline (aka anti-meridian). It will always be >= 0.
      Specified by:
      getWidth in interface Rectangle

    • getMaxX

      public double getMaxX()
      Description copied from interface: Rectangle
      The right edge of the X coordinate.
      Specified by:
      getMaxX in interface Rectangle

    • getMaxY

      public double getMaxY()
      Description copied from interface: Rectangle
      The top edge of the Y coordinate.
      Specified by:
      getMaxY in interface Rectangle

    • getMinX

      public double getMinX()
      Description copied from interface: Rectangle
      The left edge of the X coordinate.
      Specified by:
      getMinX in interface Rectangle

    • getMinY

      public double getMinY()
      Description copied from interface: Rectangle
      The bottom edge of the Y coordinate.
      Specified by:
      getMinY in interface Rectangle

    • getBoundingBox

      public Rectangle getBoundingBox()
      Description copied from interface: Shape
      Get the bounding box for this Shape. This means the shape is within the bounding box and that it touches each side of the rectangle.

      Postcondition: this.getBoundingBox().relate(this) == CONTAINS

      Specified by:
      getBoundingBox in interface Shape

    • relate

      public SpatialRelation relate(Shape other)
      Description copied from interface: Shape
      Describe the relationship between the two objects. For example
      • this is WITHIN other
      • this CONTAINS other
      • this is DISJOINT other
      • this INTERSECTS other
      Note that a Shape implementation may choose to return INTERSECTS when the true answer is WITHIN or CONTAINS for performance reasons. If a shape does this then it must document when it does. Ideally the shape will not do this approximation in all circumstances, just sometimes.

      If the shapes are equal then the result is CONTAINS (preferred) or WITHIN.

      Specified by:
      relate in interface Shape

    • relate

      public SpatialRelation relate(Point point)

    • relate

      public SpatialRelation relate(Rectangle rect)

    • verticalAtDateline

      private static boolean verticalAtDateline(RectangleImpl rect1, Rectangle rect2)

    • relate_range

      private static SpatialRelation relate_range(double int_min, double int_max, double ext_min, double ext_max)

    • relateYRange

      public SpatialRelation relateYRange(double ext_minY, double ext_maxY)
      Description copied from interface: Rectangle
      A specialization of Shape.relate(Shape) for a vertical line.
      Specified by:
      relateYRange in interface Rectangle

    • relateXRange

      public SpatialRelation relateXRange(double ext_minX, double ext_maxX)
      Description copied from interface: Rectangle
      A specialization of Shape.relate(Shape) for a horizontal line.
      Specified by:
      relateXRange in interface Rectangle

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • getCenter

      public Point getCenter()
      Description copied from interface: Shape
      Returns the center point of this shape. This is usually the same as getBoundingBox().getCenter() but it doesn't have to be.

      Postcondition: this.relate(this.getCenter()) == CONTAINS

      Specified by:
      getCenter in interface Shape

    • equals

      public boolean equals(Object obj)
      Description copied from interface: Shape
      The sub-classes of Shape generally implement the same contract for Object.equals(Object) and Object.hashCode() amongst the same sub-interface type. This means, for example, that multiple Point implementations of different classes are equal if they share the same x & y.
      Specified by:
      equals in interface Shape
      Overrides:
      equals in class Object

    • equals

      public static boolean equals(Rectangle thiz, Object o)
      All Rectangle implementations should use this definition of Object.equals(Object).

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • hashCode

      public static int hashCode(Rectangle thiz)
      All Rectangle implementations should use this definition of Object.hashCode().