Package org.apache.sis.coverage.grid

Class GridCoverage2D.PixelAccessor

java.lang.Object

org.apache.sis.coverage.grid.DefaultEvaluator

org.apache.sis.coverage.grid.GridCoverage2D.PixelAccessor

All Implemented Interfaces:

Function<org.opengis.geometry.DirectPosition,double[]>, BandedCoverage.Evaluator, GridCoverage.Evaluator

Enclosing class:

GridCoverage2D

private final class GridCoverage2D.PixelAccessor
extends DefaultEvaluator

Implementation of evaluator returned by BandedCoverage.evaluator().

Field Summary

Fields inherited from class org.apache.sis.coverage.grid.DefaultEvaluator

values

Constructor Summary

Constructors

Constructor	Description
PixelAccessor()	Creates a new evaluator for the enclosing coverage.

Method Summary

Modifier and Type	Method	Description
double[]	apply(org.opengis.geometry.DirectPosition point)	Returns a sequence of double values for a given point in the coverage.

Methods inherited from class org.apache.sis.coverage.grid.DefaultEvaluator

evaluate, getCoverage, getDefaultSlice, isNullIfOutside, isWraparoundEnabled, setDefaultSlice, setNullIfOutside, setWraparoundEnabled, toGridCoordinates, toGridPosition

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.function.Function

andThen, compose

Constructor Details

PixelAccessor

PixelAccessor()

Creates a new evaluator for the enclosing coverage.

Method Details

apply

public double[] apply(org.opengis.geometry.DirectPosition point)
               throws CannotEvaluateException

Returns a sequence of double values for a given point in the coverage. The CRS of the given point may be any coordinate reference system, or null for the same CRS than the coverage.

Specified by:

apply in interface BandedCoverage.Evaluator

Specified by:

apply in interface Function<org.opengis.geometry.DirectPosition,double[]>

Overrides:

apply in class DefaultEvaluator

Parameters:

point - the position where to evaluate.

Returns:

the sample values at the specified point, or null if the point is outside the coverage. For performance reason, this method may return the same array on every method call by overwriting previous values. Callers should not assume that the array content stay valid for a long time.

Throws:

PointOutsideCoverageException - if the evaluation failed because the input point has invalid coordinates and the DefaultEvaluator.isNullIfOutside() flag is false.

CannotEvaluateException - if the values cannot be computed at the specified coordinates for another reason. This exception may be thrown if the coverage data type cannot be converted to double by an identity or widening conversion. Subclasses may relax this constraint if appropriate.