Package org.geotools.styling.zoom

Class ListZoomContext

Object

MedialZoomContext

ListZoomContext

All Implemented Interfaces:

ZoomContext

Direct Known Subclasses:

ListZoomContext

public class ListZoomContext
extends MedialZoomContext

A zoom context specified by an explicit list of scale denominators.

Author:

Kevin Smith, Boundless

Field Summary

Fields inherited from interface ZoomContext

HINT_ID

Constructor Summary

Constructors

Constructor	Description
ListZoomContext(List<Double> scales)
ListZoomContext(List<Double> scales, int initial)

Method Summary

Modifier and Type	Method	Description
double	getMedialScale(int level)	Get a scale between the given zoom level and the next
double	getScaleDenominator(int level)	Find the reciprocal of the scale at a specified zoom level in this context.
boolean	isInRange(int level)	Is the given level within the range for which the context has clearly defined scales.
static void	validate(List<Double> scales)	Checks if the list contains a decreasing sequence of finite, positive, non-null values.

Methods inherited from class MedialZoomContext

getRange

Methods inherited from class Object

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

Constructor Details

ListZoomContext

public ListZoomContext(List<Double> scales,
 int initial)

ListZoomContext

public ListZoomContext(List<Double> scales)

Method Details

validate

public static void validate(List<Double> scales)

Checks if the list contains a decreasing sequence of finite, positive, non-null values.

Throws:

IllegalArgumentException - if the values are not decreasing, positive, and finite.

NullPointerException - if any values are null.

getScaleDenominator

public double getScaleDenominator(int level)

Description copied from interface: ZoomContext

Find the reciprocal of the scale at a specified zoom level in this context.

Parameters:

level - The level

Returns:

The scale denominator

getMedialScale

public double getMedialScale(int level)

Description copied from class: MedialZoomContext

Get a scale between the given zoom level and the next

Specified by:

getMedialScale in class MedialZoomContext

isInRange

public boolean isInRange(int level)

Description copied from interface: ZoomContext

Is the given level within the range for which the context has clearly defined scales.