/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2001-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.coverage.grid;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.RenderedImage;
import java.util.Locale;
import org.geotools.factory.Hints;
import org.geotools.geometry.DirectPosition2D;
import org.geotools.geometry.Envelope2D;
import org.geotools.geometry.TransformedDirectPosition;
import org.geotools.metadata.iso.spatial.PixelTranslation;
import org.geotools.referencing.CRS;
import org.geotools.referencing.factory.ReferencingFactoryContainer;
import org.geotools.referencing.operation.transform.DimensionFilter;
import org.geotools.referencing.operation.transform.ProjectiveTransform;
import org.geotools.resources.Classes;
import org.geotools.resources.i18n.ErrorKeys;
import org.geotools.resources.i18n.Errors;
import org.opengis.coverage.CannotEvaluateException;
import org.opengis.coverage.grid.GridEnvelope;
import org.opengis.coverage.grid.GridGeometry;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.Envelope;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.metadata.spatial.PixelOrientation;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
import org.opengis.referencing.datum.PixelInCell;
import org.opengis.referencing.operation.MathTransform;
import org.opengis.referencing.operation.MathTransform2D;
import org.opengis.referencing.operation.NoninvertibleTransformException;
import org.opengis.referencing.operation.TransformException;
/**
* Describes the valid range of grid coordinates and the math transform, in the special case
* where only 2 dimensions are in use. By "in use", we means dimension with more than 1 pixel.
* For example a grid size of 512×512×1 pixels can be represented by this
* {@code GridGeometry2D} class (some peoples said 2.5D) because a two-dimensional grid
* coordinate is enough for referencing a pixel without ambiguity. But a grid size of
* 512×512×2 pixels can not be represented by this {@code GridGeometry2D},
* because a three-dimensional coordinate is mandatory for referencing a pixel without
* ambiguity.
*
* @since 2.1
*
* @source $URL$
* @version $Id$
* @author Martin Desruisseaux (IRD)
*
* @see ImageGeometry
* @see GeneralGridGeometry
*/
public class GridGeometry2D extends GeneralGridGeometry {
/**
* Serial number for interoperability with different versions.
*/
private static final long serialVersionUID = -3989363771504614419L;
/**
* Helpers methods for 2D CRS creation. Will be constructed only when first needed.
*/
private static ReferencingFactoryContainer FACTORIES;
/**
* The two-dimensional part of the coordinate reference system.
*
* @see #getCoordinateReferenceSystem2D
*/
private final CoordinateReferenceSystem crs2D;
/**
* Index of column ({@link #gridDimensionX}) and row ({@link #gridDimensionY}) ordinates
* in a grid point. They are the index of the first two dimensions with a {@linkplain
* GridEnvelope#getSpan span} greater than 1 in the {@linkplain #getGridRange grid range}.
* Their values are usually 0 and 1 respectively.
* <p>
* It is garanteed that {@link #gridDimensionX} < {@link #gridDimensionY}.
*/
public final int gridDimensionX, gridDimensionY;
/**
* The ({@link #gridDimensionX}, {@link #gridDimensionY}) dimensions in the envelope space.
* They are index of (<var>x</var>, <var>y</var>) ordinates in a direct position after the
* {@linkplain #getGridToCoordinateSystem grid to CRS} transform.
* <p>
* There is no garantee that {@link #gridDimensionX} maps to {@link #axisDimensionX} and
* {@link #gridDimensionY} maps to {@link #axisDimensionY}, since axis may be interchanged.
* <p>
* It is garanteed that {@link #axisDimensionX} < {@link #axisDimensionY}.
*/
public final int axisDimensionX, axisDimensionY;
/**
* A math transform mapping only two dimensions of {@link #gridToCRS gridToCRS}.
* Is {@code null} if and only if {@link #gridToCRS} is null.
*/
private final MathTransform2D gridToCRS2D;
/**
* The inverse of {@code gridToCRS2D}.
* Is {@code null} if and only if {@link #gridToCRS2D} is null.
*/
private final MathTransform2D gridFromCRS2D;
/**
* {@link #gridToCRS2D} cached in the {@link PixelOrientation#UPPER_LEFT} case.
* This field is serialized because it may be user-provided, in which case it is
* likely to be more accurate than what we would compute. If {@code null}, will
* be computed when first needed.
*/
private MathTransform2D cornerToCRS2D;
/**
* Inverse of {@link #cornerToCRS2D} cached to transform grid coordinates
* to world coordinates with {@link PixelOrientation#UPPER_LEFT}. If {@code null},
* it will be computed when first needed.
*/
private transient MathTransform2D crsToCorner2D;
/**
* Used for transforming a direct position from arbitrary to internal CRS.
* Will be created only when first needed. Note that the target CRS should
* be two-dimensional.
*/
private transient TransformedDirectPosition arbitraryToInternal;
/**
* Tests the validity of this grid geometry.
*/
private boolean isValid() {
if (gridToCRS != null) {
final int sourceDim = gridToCRS.getSourceDimensions();
final int targetDim = gridToCRS.getTargetDimensions();
assert gridToCRS.equals(gridToCRS2D) == (sourceDim == 2 && targetDim == 2);
assert !gridToCRS2D.equals(cornerToCRS2D);
assert gridRange == null || sourceDim == gridRange.getDimension() : gridRange;
assert envelope == null || targetDim == envelope.getDimension() : envelope;
assert gridDimensionY < sourceDim : gridDimensionY;
assert axisDimensionY < targetDim : axisDimensionY;
}
assert gridDimensionX < gridDimensionY : gridDimensionX;
assert axisDimensionX < axisDimensionY : axisDimensionX;
return crs2D == null || crs2D.getCoordinateSystem().getDimension() == 2;
}
/**
* Constructs a new grid geometry identical to the specified one except for the CRS.
* Note that this constructor just defines the CRS; it does <strong>not</strong> reproject
* the envelope. For this reason, this constructor should not be public. It is for internal
* use by {@link GridCoverageFactory} only.
*/
GridGeometry2D(final GridGeometry2D gm, final CoordinateReferenceSystem crs) {
super(gm, crs);
gridDimensionX = gm.gridDimensionX;
gridDimensionY = gm.gridDimensionY;
axisDimensionX = gm.axisDimensionX;
axisDimensionY = gm.axisDimensionY;
gridFromCRS2D = gm.gridFromCRS2D;
gridToCRS2D = gm.gridToCRS2D;
cornerToCRS2D = gm.cornerToCRS2D;
crs2D = createCRS2D();
assert isValid() : this;
}
/**
* Creates a new grid geometry with the same values than the given grid geometry. This
* is a copy constructor useful when the instance must be a {@code GridGeometry2D}.
*
* @param other The other grid geometry to copy.
*
* @see #wrap
*
* @since 2.5
*/
public GridGeometry2D(final GridGeometry other) {
super(other);
if (other instanceof GridGeometry2D) {
final GridGeometry2D gg = (GridGeometry2D) other;
gridToCRS2D = gg.gridToCRS2D;
gridFromCRS2D = gg.gridFromCRS2D;
gridDimensionX = gg.gridDimensionX;
gridDimensionY = gg.gridDimensionY;
axisDimensionX = gg.axisDimensionX;
axisDimensionY = gg.axisDimensionY;
crs2D = gg.crs2D;
cornerToCRS2D = gg.cornerToCRS2D;
} else {
final int[] dimensions;
dimensions = new int[4];
gridToCRS2D = getMathTransform2D(gridToCRS, gridRange, dimensions, null);
gridFromCRS2D = inverse(gridToCRS2D);
gridDimensionX = dimensions[0];
gridDimensionY = dimensions[1];
axisDimensionX = dimensions[2];
axisDimensionY = dimensions[3];
crs2D = createCRS2D();
}
assert isValid() : this;
}
/**
* Constructs a new grid geometry from a grid range and a math transform. The arguments are
* passed unchanged to the {@linkplain GeneralGridGeometry#GeneralGridGeometry(GridEnvelope,
* MathTransform, CoordinateReferenceSystem) super-class constructor}. However, they must
* obey to the following additional constraints:
* <p>
* <ul>
* <li>Only two dimensions in the grid range can have a
* {@linkplain GridEnvelope#getSpan span} larger than 1.</li>
* </ul>
*
* @param gridRange The valid coordinate range of a grid coverage, or {@code null} if none.
* The lowest valid grid coordinate is zero for {@link java.awt.image.BufferedImage},
* but may be non-zero for arbitrary {@link java.awt.image.RenderedImage}. A grid with
* 512 cells can have a minimum coordinate of 0 and maximum of 512, with 511 as the
* highest valid index.
* @param gridToCRS The math transform which allows for the transformations
* from grid coordinates (pixel's <em>center</em>) to real world earth coordinates.
* @param crs The coordinate reference system for the "real world" coordinates, or {@code null}
* if unknown. This CRS is given to the {@linkplain #getEnvelope envelope}.
*
* @throws MismatchedDimensionException if the math transform and the CRS don't have
* consistent dimensions.
* @throws IllegalArgumentException if {@code gridRange} has more than 2 dimensions with
* a {@linkplain GridEnvelope#getSpan span} larger than 1, or if the math transform
* can't transform coordinates in the domain of the specified grid range.
*
* @since 2.2
*/
public GridGeometry2D(final GridEnvelope gridRange,
final MathTransform gridToCRS,
final CoordinateReferenceSystem crs)
throws IllegalArgumentException, MismatchedDimensionException
{
this(gridRange, PixelInCell.CELL_CENTER, gridToCRS, crs, null);
}
/**
* Constructs a new grid geometry from a math transform. This constructor is similar to
* <code>{@linkplain #GridGeometry2D(GridEnvelope, MathTransform, CoordinateReferenceSystem)
* GridGeometry2D}(gridRange, gridToCRS, crs)</code> with the addition of an explicit anchor
* and an optional set of hints giving more control on the {@link MathTransform2D} to be
* inferred from the <var>n</var>-dimensional transform.
* <p>
* The {@code anchor} argument tells whatever the {@code gridToCRS} transform maps {@linkplain
* PixelInCell#CELL_CENTER cell center} (OGC convention) or {@linkplain PixelInCell#CELL_CORNER
* cell corner} (Java2D/JAI convention). At the opposite of the constructor expecting a {@link
* PixelOrientation} argument, the translation (if any) applies to every dimensions, not just
* the ones mapping the 2D part.
*
* @param gridRange The valid coordinate range of a grid coverage, or {@code null} if none.
* @param anchor Whatever the {@code gridToCRS} transform maps
* {@linkplain PixelInCell#CELL_CENTER cell center} (OGC convention) or
* {@linkplain PixelInCell#CELL_CORNER cell corner} (Java2D/JAI convention).
* @param gridToCRS The math transform which allows for the transformations from grid
* coordinates to real world earth coordinates.
* @param crs The coordinate reference system for the "real world" coordinates, or
* {@code null} if unknown. This CRS is given to the
* {@linkplain #getEnvelope envelope}.
* @param hints An optional set of hints controlling the {@link DimensionFilter} to be
* used for deriving the {@link MathTransform2D} instance from the given
* {@code gridToCRS} transform.
*
* @throws MismatchedDimensionException if the math transform and the CRS don't have
* consistent dimensions.
* @throws IllegalArgumentException if the math transform can't transform coordinates
* in the domain of the specified grid range.
*
* @since 2.5
*/
public GridGeometry2D(final GridEnvelope gridRange,
final PixelInCell anchor,
final MathTransform gridToCRS,
final CoordinateReferenceSystem crs,
final Hints hints)
throws MismatchedDimensionException, IllegalArgumentException
{
super(gridRange, anchor, gridToCRS, crs);
final int[] dimensions;
dimensions = new int[4];
gridToCRS2D = getMathTransform2D(super.gridToCRS, gridRange, dimensions, hints);
gridFromCRS2D = inverse(gridToCRS2D);
gridDimensionX = dimensions[0];
gridDimensionY = dimensions[1];
axisDimensionX = dimensions[2];
axisDimensionY = dimensions[3];
crs2D = createCRS2D();
if (PixelInCell.CELL_CORNER.equals(anchor)) {
cornerToCRS2D = getMathTransform2D(gridToCRS, gridRange, dimensions, hints);
}
assert isValid() : this;
}
/**
* Constructs a new grid geometry from a math transform. This constructor is similar to
* <code>{@linkplain #GridGeometry2D(GridEnvelope, MathTransform, CoordinateReferenceSystem)
* GridGeometry2D}(gridRange, gridToCRS, crs)</code> with the addition of an explicit anchor
* and an optional set of hints giving more control on the {@link MathTransform2D} to be
* inferred from the <var>n</var>-dimensional transform.
* <p>
* The {@code anchor} argument tells whatever the {@code gridToCRS} transform maps pixel
* center or some corner. Use {@link PixelOrientation#CENTER CENTER} for OGC conventions or
* {@link PixelOrientation#UPPER_LEFT UPPER_LEFT} for Java2D/JAI conventions. A translation
* (if needed) is applied only on the {@link #gridDimensionX} and {@link #gridDimensionY}
* parts of the transform - all other dimensions are assumed mapping pixel center.
*
* @param gridRange The valid coordinate range of a grid coverage, or {@code null} if none.
* @param anchor Whatever the two-dimensional part of the {@code gridToCRS} transform
* maps pixel center or some corner.
* @param gridToCRS The math transform from grid coordinates to real world earth coordinates.
* @param crs The coordinate reference system for the "real world" coordinates, or
* {@code null} if unknown.
* @param hints An optional set of hints controlling the {@link DimensionFilter} to be
* used for deriving the {@link MathTransform2D} instance from the given
* {@code gridToCRS} transform.
*
* @throws MismatchedDimensionException if the math transform and the CRS don't have
* consistent dimensions.
* @throws IllegalArgumentException if {@code gridRange} has more than 2 dimensions with
* a {@linkplain GridEnvelope#getSpan span} larger than 1, or if the math transform
* can't transform coordinates in the domain of the specified grid range.
*
* @since 2.5
*/
public GridGeometry2D(final GridEnvelope gridRange,
final PixelOrientation anchor,
final MathTransform gridToCRS,
final CoordinateReferenceSystem crs,
final Hints hints)
throws IllegalArgumentException, MismatchedDimensionException
{
this(gridRange, anchor, gridToCRS, new int[4], crs, hints);
}
/**
* Workaround for RFE #4093999 ("Relax constraint on placement of this()/super()
* call in constructors"). We could write this code in a less convolved way if only
* this requested was honored...
*/
private GridGeometry2D(final GridEnvelope gridRange,
final PixelOrientation anchor,
final MathTransform gridToCRS,
final int[] dimensions, // Allocated by caller.
final CoordinateReferenceSystem crs,
final Hints hints)
{
this(gridRange, anchor, (gridToCRS != null) && (gridToCRS.getSourceDimensions() == 2) &&
(gridToCRS.getTargetDimensions() == 2) && PixelOrientation.UPPER_LEFT.equals(anchor) ?
PixelInCell.CELL_CORNER : PixelInCell.CELL_CENTER, gridToCRS,
getMathTransform2D(gridToCRS, gridRange, dimensions, hints), dimensions, crs);
}
/**
* Workaround for RFE #4093999 ("Relax constraint on placement of this()/super()
* call in constructors").
*/
private GridGeometry2D(final GridEnvelope gridRange,
final PixelOrientation anchor,
final PixelInCell anchorND, // Computed by caller
final MathTransform gridToCRS,
final MathTransform2D gridToCRS2D, // Computed by caller
final int[] dimensions, // Computed by caller
final CoordinateReferenceSystem crs)
{
super(gridRange, anchorND, PixelTranslation.translate(gridToCRS, anchor,
PixelTranslation.getPixelOrientation(anchorND), dimensions[0], dimensions[1]), crs);
gridDimensionX = dimensions[0];
gridDimensionY = dimensions[1];
axisDimensionX = dimensions[2];
axisDimensionY = dimensions[3];
if (gridToCRS == gridToCRS2D) {
// Recycles existing instance if we can (common case)
this.gridToCRS2D = (MathTransform2D) super.gridToCRS;
} else {
final int xdim = (gridDimensionX < gridDimensionY) ? 0 : 1;
this.gridToCRS2D = (MathTransform2D) PixelTranslation.translate(
gridToCRS2D, anchor, PixelOrientation.CENTER, xdim, xdim ^ 1);
}
gridFromCRS2D = inverse(this.gridToCRS2D);
crs2D = createCRS2D();
assert isValid() : this;
}
/**
* Constructs a new grid geometry from an envelope and a {@linkplain MathTransform math
* transform}. According OGC specification, the math transform should map {@linkplain
* PixelInCell#CELL_CENTER pixel center}. But in Java2D/JAI conventions, the transform
* is rather expected to maps {@linkplain PixelInCell#CELL_CORNER pixel corner}. The
* convention to follow can be specified by the {@code anchor} argument.
*
* @param anchor {@link PixelInCell#CELL_CENTER CELL_CENTER} for OGC conventions or
* {@link PixelInCell#CELL_CORNER CELL_CORNER} for Java2D/JAI conventions.
* @param gridToCRS The math transform which allows for the transformations from grid
* coordinates to real world earth coordinates. May be {@code null},
* but this is not recommended.
* @param envelope The envelope (including CRS) of a grid coverage, or {@code null} if none.
* @param hints An optional set of hints controlling the {@link DimensionFilter} to be
* used for deriving the {@link MathTransform2D} instance from the given
* {@code gridToCRS} transform.
*
* @throws MismatchedDimensionException if the math transform and the envelope doesn't have
* consistent dimensions.
* @throws IllegalArgumentException if the math transform can't transform coordinates
* in the domain of the grid range.
*
* @since 2.5
*/
public GridGeometry2D(final PixelInCell anchor,
final MathTransform gridToCRS,
final Envelope envelope,
final Hints hints)
throws MismatchedDimensionException, IllegalArgumentException
{
super(anchor, gridToCRS, envelope);
final int[] dimensions;
dimensions = new int[4];
gridToCRS2D = getMathTransform2D(this.gridToCRS, gridRange, dimensions, hints);
gridFromCRS2D = inverse(gridToCRS2D);
gridDimensionX = dimensions[0];
gridDimensionY = dimensions[1];
axisDimensionX = dimensions[2];
axisDimensionY = dimensions[3];
crs2D = createCRS2D();
if (PixelInCell.CELL_CORNER.equals(anchor)) {
cornerToCRS2D = getMathTransform2D(gridToCRS, gridRange, dimensions, hints);
}
assert isValid() : this;
}
/**
* Constructs a new grid geometry from an envelope. This constructors applies the same heuristic
* rules than the {@linkplain GeneralGridGeometry#GeneralGridGeometry(GridEnvelope,Envelope)
* super-class constructor}. However, they must obey to the same additional constraints than
* the {@linkplain #GridGeometry2D(GridEnvelope, MathTransform, CoordinateReferenceSystem) main
* constructor}.
*
* @param gridRange The valid coordinate range of a grid coverage.
* @param userRange The corresponding coordinate range in user coordinate.
*
* @throws IllegalArgumentException if {@code gridRange} has more than 2 dimensions with
* a {@linkplain GridEnvelope#getLength length} larger than 1.
* @throws MismatchedDimensionException if the grid range and the CRS doesn't have
* consistent dimensions.
*
* @since 2.2
*/
public GridGeometry2D(final GridEnvelope gridRange, final Envelope userRange)
throws IllegalArgumentException, MismatchedDimensionException
{
this(gridRange, userRange, null, false, true);
}
/**
* Implementation of heuristic constructors.
*/
private GridGeometry2D(final GridEnvelope gridRange,
final Envelope userRange,
final boolean[] reverse,
final boolean swapXY,
final boolean automatic)
throws IllegalArgumentException, MismatchedDimensionException
{
super(gridRange, userRange, reverse, swapXY, automatic);
final int[] dimensions;
dimensions = new int[4];
gridToCRS2D = getMathTransform2D(gridToCRS, gridRange, dimensions, null);
gridFromCRS2D = inverse(gridToCRS2D);
gridDimensionX = dimensions[0];
gridDimensionY = dimensions[1];
axisDimensionX = dimensions[2];
axisDimensionY = dimensions[3];
crs2D = createCRS2D();
assert isValid() : this;
}
/**
* Constructs a new two-dimensional grid geometry. A math transform will be computed
* automatically with an inverted <var>y</var> axis (i.e. {@code gridRange} and
* {@code userRange} are assumed to have <var>y</var> axis in opposite direction).
*
* @param gridRange The valid coordinate range of a grid coverage.
* Increasing <var>x</var> values goes right and
* increasing <var>y</var> values goes <strong>down</strong>.
* @param userRange The corresponding coordinate range in user coordinate.
* Increasing <var>x</var> values goes right and
* increasing <var>y</var> values goes <strong>up</strong>.
* This rectangle must contains entirely all pixels, i.e.
* the rectangle's upper left corner must coincide with
* the upper left corner of the first pixel and the rectangle's
* lower right corner must coincide with the lower right corner
* of the last pixel.
*/
public GridGeometry2D(final Rectangle gridRange, final Rectangle2D userRange) {
this(new GridEnvelope2D(gridRange), getMathTransform(gridRange, userRange),
(CoordinateReferenceSystem) null);
}
/**
* Returns the given grid geometry as a {@code GridGeometry2D}. If the given
* object is already an instance of {@code GridGeometry2D}, then it is returned
* unchanged. Otherwise a new {@code GridGeometry2D} instance is created using the
* {@linkplain #GridGeometry2D(GridGeometry) copy constructor}.
*
* @param other The grid geometry to wrap.
* @return The wrapped geometry, or {@code null} if {@code other} was null.
*
* @since 2.5
*/
public static GridGeometry2D wrap(final GridGeometry other) {
if (other == null || other instanceof GridGeometry2D) {
return (GridGeometry2D) other;
}
return new GridGeometry2D(other);
}
/**
* Workaround for RFE #4093999 ("Relax constraint on placement of this()/super()
* call in constructors").
*/
private static MathTransform getMathTransform(final Rectangle gridRange,
final Rectangle2D userRange)
{
final double scaleX = userRange.getWidth() / gridRange.getWidth();
final double scaleY = userRange.getHeight() / gridRange.getHeight();
final double transX = userRange.getMinX() - gridRange.x*scaleX;
final double transY = userRange.getMaxY() + gridRange.y*scaleY;
final AffineTransform tr = new AffineTransform(scaleX, 0, 0, -scaleY, transX, transY);
tr.translate(0.5, 0.5); // Maps to pixel center
return ProjectiveTransform.create(tr);
}
/**
* Returns the math transform for two dimensions of the specified transform. This methods
* search for the grid dimensions in the given grid range having a length greater than 1.
* The corresponding CRS dimensions are inferred from the transform itself.
*
* @param gridRange The grid range, or {@code null} if unknown.
* @param transform The transform, or {@code null} if none.
* @param axis An array of length 4 initialized to 0. This is the array where to store
* {@link #gridDimensionX}, {@link #gridDimensionY}, {@link #axisDimensionX} and
* {@link #axisDimensionY} values. This argument is actually a workaround for a
* Java language limitation (no multiple return values). If we could, we would
* have returned directly the arrays computed in the body of this method.
* @param hints An optional set of hints for {@link DimensionFilter} creation.
* @return The {@link MathTransform2D} part of {@code transform}, or {@code null}
* if and only if {@code gridToCRS} was null..
* @throws IllegalArgumentException if the 2D part is not separable.
*/
private static MathTransform2D getMathTransform2D(final MathTransform transform,
final GridEnvelope gridRange,
final int[] axis, final Hints hints)
throws IllegalArgumentException
{
if (transform==null || transform instanceof MathTransform2D) {
axis[1] = axis[3] = 1; // Identity: (0,1) --> (0,1)
return (MathTransform2D) transform;
}
/*
* Finds the axis for the two dimensional parts. We infer them from the grid range.
* If no grid range were specified, then we assume that they are the 2 first dimensions.
*/
final DimensionFilter filter = DimensionFilter.getInstance(hints);
if (gridRange != null) {
final int dimension = gridRange.getDimension();
for (int i=0; i<dimension; i++) {
if (gridRange.getSpan(i) > 1) {
filter.addSourceDimension(i);
}
}
} else {
filter.addSourceDimensionRange(0, 2);
}
Exception cause = null;
int[] dimensions = filter.getSourceDimensions();
/*
* Select a math transform that operate only on the two dimensions choosen above.
* If such a math transform doesn't have exactly 2 output dimensions, then select
* the same output dimensions than the input ones.
*/
MathTransform candidate;
if (dimensions.length == 2) {
axis[0] = dimensions[0]; // gridDimensionX
axis[1] = dimensions[1]; // gridDimensionY
try {
candidate = filter.separate(transform);
if (candidate.getTargetDimensions() != 2) {
filter.clear();
filter.addSourceDimensions(dimensions);
filter.addTargetDimensions(dimensions);
candidate = filter.separate(transform);
}
dimensions = filter.getTargetDimensions();
axis[2] = dimensions[0]; // axisDimensionX
axis[3] = dimensions[1]; // axisDimensionY
try {
return (MathTransform2D) candidate;
} catch (ClassCastException exception) {
cause = exception;
}
} catch (FactoryException exception) {
cause = exception;
}
}
throw new IllegalArgumentException(Errors.format(ErrorKeys.NO_TRANSFORM2D_AVAILABLE), cause);
}
/**
* Inverses the specified math transform. This method is invoked by constructors only. It wraps
* {@link NoninvertibleTransformException} into {@link IllegalArgumentException}, since failures
* to inverse a transform are caused by an illegal user-supplied transform.
*
* @throws IllegalArgumentException if the transform is non-invertible.
*/
private static MathTransform2D inverse(final MathTransform2D gridToCRS2D)
throws IllegalArgumentException
{
if (gridToCRS2D == null) {
return null;
} else try {
return gridToCRS2D.inverse();
} catch (NoninvertibleTransformException exception) {
throw new IllegalArgumentException(Errors.format(ErrorKeys.BAD_TRANSFORM_$1,
Classes.getClass(gridToCRS2D)), exception);
}
}
/**
* Constructs the two-dimensional CRS. This is usually identical to the user-supplied CRS.
* However, the user is allowed to specify a wider CRS (for example a 3D one which includes
* a time axis), in which case we infer which axis apply to the 2D image, and constructs a
* 2D CRS with only those axis.
*
* @return The coordinate reference system, or {@code null} if none.
* @throws InvalidGridGeometryException if the CRS can't be reduced.
*/
private CoordinateReferenceSystem createCRS2D() throws InvalidGridGeometryException {
if (!super.isDefined(CRS_BITMASK)) {
return null;
}
CoordinateReferenceSystem crs = super.getCoordinateReferenceSystem();
try {
crs = reduce(crs);
} catch (FactoryException exception) {
throw new InvalidGridGeometryException(Errors.format(
ErrorKeys.ILLEGAL_ARGUMENT_$2, "crs", crs.getName()), exception);
}
return crs;
}
/**
* Reduces the specified envelope to a two-dimensional one. If the given envelope has
* more than two dimensions, then a new one is created using only the coordinates at
* ({@link #axisDimensionX}, {@link #axisDimensionY}) index.
* <p>
* The {@link Envelope#getCoordinateReferenceSystem coordinate reference system} of the
* source envelope is ignored. The coordinate reference system of the target envelope
* will be {@link #getCoordinateReferenceSystem2D} or {@code null}.
*
* @param envelope The envelope to reduce, or {@code null}. This envelope will not be modified.
* @return An envelope with exactly 2 dimensions, or {@code null} if {@code envelope} was null.
* The returned envelope is always a new instance, so it can be modified safely.
*
* @since 2.5
*/
public Envelope2D reduce(final Envelope envelope) {
if (envelope == null) {
return null;
}
return new Envelope2D(crs2D,
envelope.getMinimum(axisDimensionX),
envelope.getMinimum(axisDimensionY),
envelope.getSpan (axisDimensionX),
envelope.getSpan (axisDimensionY));
}
/**
* Reduces the specified CRS to a two-dimensional one. If the given CRS has more than two
* dimensions, then a new one is created using only the axis at ({@link #axisDimensionX},
* {@link #axisDimensionY}) index.
*
* @param crs The coordinate reference system to reduce, or {@code null}.
* @return A coordinate reference system with no more than 2 dimensions,
* or {@code null} if {@code crs} was null.
* @throws FactoryException if the given CRS can't be reduced to two dimensions.
*
* @since 2.5
*/
public CoordinateReferenceSystem reduce(final CoordinateReferenceSystem crs)
throws FactoryException
{
// Reminder: is is garanteed that axisDimensionX < axisDimensionY
if (crs == null || crs.getCoordinateSystem().getDimension() <= 2) {
return crs;
}
if (FACTORIES == null) {
FACTORIES = ReferencingFactoryContainer.instance(null);
// No need to synchronize: this is not a big deal if
// two ReferencingFactoryContainer instances are created.
}
final CoordinateReferenceSystem reducedCRS;
reducedCRS = FACTORIES.separate(crs, new int[] {axisDimensionX, axisDimensionY});
assert reducedCRS.getCoordinateSystem().getDimension() == 2 : reducedCRS;
return reducedCRS;
}
/**
* Returns the two-dimensional part of this grid geometry CRS. If the
* {@linkplain #getCoordinateReferenceSystem complete CRS} is two-dimensional, then this
* method returns the same CRS. Otherwise it returns a CRS for ({@link #axisDimensionX},
* {@link #axisDimensionY}) axis. Note that those axis are garanteed to appears in the
* same order than in the complete CRS.
*
* @return The coordinate reference system (never {@code null}).
* @throws InvalidGridGeometryException if this grid geometry has no CRS (i.e.
* <code>{@linkplain #isDefined isDefined}({@linkplain #CRS CRS})</code>
* returned {@code false}).
*
* @see #getCoordinateReferenceSystem
*
* @since 2.2
*/
public CoordinateReferenceSystem getCoordinateReferenceSystem2D()
throws InvalidGridGeometryException
{
if (crs2D != null) {
assert isDefined(CRS_BITMASK);
return crs2D;
}
assert !isDefined(CRS_BITMASK);
throw new InvalidGridGeometryException(ErrorKeys.UNSPECIFIED_CRS);
}
/**
* Returns the two-dimensional bounding box for the coverage domain in coordinate reference
* system coordinates. If the coverage envelope has more than two dimensions, only the
* dimensions used in the underlying rendered image are returned.
*
* @return The bounding box in "real world" coordinates (never {@code null}).
* @throws InvalidGridGeometryException if this grid geometry has no envelope (i.e.
* <code>{@linkplain #isDefined isDefined}({@linkplain #ENVELOPE_BITMASK ENVELOPE_BITMASK})</code>
* returned {@code false}).
*
* @see #getEnvelope
*/
public Envelope2D getEnvelope2D() throws InvalidGridGeometryException {
if (envelope!=null && !envelope.isNull()) {
assert isDefined(ENVELOPE_BITMASK);
return new Envelope2D(crs2D,
envelope.getMinimum(axisDimensionX),
envelope.getMinimum(axisDimensionY),
envelope.getSpan (axisDimensionX),
envelope.getSpan (axisDimensionY));
// Note: we didn't invoked reduce(Envelope) in order to make sure that
// our privated 'envelope' field is not exposed to subclasses.
}
assert !isDefined(ENVELOPE_BITMASK);
throw new InvalidGridGeometryException(gridToCRS == null ?
ErrorKeys.UNSPECIFIED_TRANSFORM : ErrorKeys.UNSPECIFIED_IMAGE_SIZE);
}
/**
* Returns the two-dimensional part of the {@linkplain #getGridRange grid range}
* as a rectangle. Note that the returned object is a {@link Rectangle} subclass.
*
* @return The grid range (never {@code null}).
* @throws InvalidGridGeometryException if this grid geometry has no grid range (i.e.
* <code>{@linkplain #isDefined isDefined}({@linkplain #GRID_RANGE_BITMASK GRID_RANGE_BITMASK})</code>
* returned {@code false}).
*
* @see #getGridRange
*/
public GridEnvelope2D getGridRange2D() throws InvalidGridGeometryException {
if (gridRange != null) {
assert isDefined(GRID_RANGE_BITMASK);
return new GridEnvelope2D(gridRange.getLow (gridDimensionX),
gridRange.getLow (gridDimensionY),
gridRange.getSpan (gridDimensionX),
gridRange.getSpan (gridDimensionY));
}
assert !isDefined(GRID_RANGE_BITMASK);
throw new InvalidGridGeometryException(ErrorKeys.UNSPECIFIED_IMAGE_SIZE);
}
/**
* Returns a math transform for the two dimensional part. This is a convenience method for
* working on horizontal data while ignoring vertical or temporal dimensions.
*
* @return The transform which allows for the transformations from grid coordinates
* to real world earth coordinates, operating only on two dimensions.
* The returned transform is often an instance of {@link AffineTransform}, which
* make it convenient for interoperability with Java2D.
* @throws InvalidGridGeometryException if a two-dimensional transform is not available
* for this grid geometry.
*
* @see #getGridToCRS
*
* @since 2.3
*/
public MathTransform2D getGridToCRS2D() throws InvalidGridGeometryException {
if (gridToCRS2D != null) {
return gridToCRS2D;
}
throw new InvalidGridGeometryException(ErrorKeys.NO_TRANSFORM2D_AVAILABLE);
}
/**
* Returns a math transform for the two dimensional part for conversion from world to
* grid coordinates. This is a convenience method for working on horizontal data
* while ignoring vertical or temporal dimensions.
*
* @return The transform which allows for the transformations from real world earth
* coordinates to grid coordinates, operating only on two dimensions.
* The returned transform is often an instance of {@link AffineTransform}, which
* makes it convenient for interoperability with Java2D.
* @throws InvalidGridGeometryException if a two-dimensional transform is not available
* for this grid geometry.
*
* @see #getGridToCRS
*
* @since 2.6
*/
public MathTransform2D getCRSToGrid2D() throws InvalidGridGeometryException {
if (gridFromCRS2D != null) {
return gridFromCRS2D;
}
throw new InvalidGridGeometryException(ErrorKeys.NONINVERTIBLE_TRANSFORM);
}
/**
* Returns a math transform for the two dimensional part. This method is similar
* to {@link #getGridToCRS2D()} except that the transform may maps a pixel corner
* instead of pixel center.
*
* @param orientation The pixel part to map. The default value is
* {@link PixelOrientation#CENTER CENTER}.
* @return The transform which allows for the transformations from grid coordinates
* to real world earth coordinates.
* @throws InvalidGridGeometryException if a two-dimensional transform is not available
* for this grid geometry.
*
* @since 2.3
*/
public MathTransform2D getGridToCRS2D(final PixelOrientation orientation) {
if (gridToCRS2D == null) {
throw new InvalidGridGeometryException(ErrorKeys.NO_TRANSFORM2D_AVAILABLE);
}
if (!PixelOrientation.UPPER_LEFT.equals(orientation)) {
return computeGridToCRS2D(orientation);
}
synchronized (this) {
if (cornerToCRS2D == null) {
/*
* If the gridToCRS transform is 2-dimensional, reuse the existing instance
* (we will ensure in the assertion that it is suitable). Otherwise computes
* and caches a new instance. We cache only the UPPER_LEFT case since it is
* widely used; the other cases are rather unusual.
*/
if (gridToCRS.getSourceDimensions() == 2 && gridToCRS.getTargetDimensions() == 2) {
cornerToCRS2D = (MathTransform2D) super.getGridToCRS(PixelInCell.CELL_CORNER);
} else {
cornerToCRS2D = computeGridToCRS2D(orientation);
}
}
}
return cornerToCRS2D;
}
/**
* Returns a math transform for the two dimensional part. This method is similar
* to {@link #getCRSToGrid2D()} except that the transform may map a pixel corner
* instead of pixel center.
*
* @param orientation The pixel part to map. The default value is
* {@link PixelOrientation#CENTER CENTER}.
* @return The transform which allows for the transformations from world coordinates
* to grid coordinates.
* @throws InvalidGridGeometryException if a two-dimensional transform is not available
* for this grid geometry.
*
* @since 2.6
*/
public MathTransform2D getCRSToGrid2D(final PixelOrientation orientation) {
if (gridToCRS2D == null) {
throw new InvalidGridGeometryException(ErrorKeys.NO_TRANSFORM2D_AVAILABLE);
}
if (!PixelOrientation.UPPER_LEFT.equals(orientation)) {
try {
return computeGridToCRS2D(orientation).inverse();
} catch (NoninvertibleTransformException nte) {
throw new InvalidGridGeometryException(ErrorKeys.NONINVERTIBLE_TRANSFORM);
}
}
if (crsToCorner2D == null) {
try {
crsToCorner2D = getGridToCRS2D(PixelOrientation.UPPER_LEFT).inverse();
} catch (NoninvertibleTransformException nte) {
throw new InvalidGridGeometryException(ErrorKeys.NONINVERTIBLE_TRANSFORM);
}
}
return crsToCorner2D;
}
/**
* Computes the value to be returned by {@link #getGridToCRS2D}.
*/
private MathTransform2D computeGridToCRS2D(final PixelOrientation orientation) {
final int xdim = (gridDimensionX < gridDimensionY) ? 0 : 1;
return (MathTransform2D) PixelTranslation.translate(gridToCRS2D,
PixelOrientation.CENTER, orientation, xdim, xdim ^ 1);
}
/**
* Returns a math transform mapping the specified pixel part. A translation (if needed) is
* applied on the {@link #gridDimensionX} and {@link #gridDimensionY} parts of the transform;
* all other dimensions are assumed mapping pixel center. For applying a translation on all
* dimensions, use {@link #getGridToCRS(PixelInCell)} instead.
*
* @param orientation The pixel part to map. The default value is
* {@link PixelOrientation#CENTER CENTER}.
* @return The transform which allows for the transformations from grid coordinates
* to real world earth coordinates.
* @throws InvalidGridGeometryException if a transform is not available
* for this grid geometry.
*
* @since 2.3
*/
public MathTransform getGridToCRS(final PixelOrientation orientation) {
if (gridToCRS == null) {
throw new InvalidGridGeometryException(ErrorKeys.UNSPECIFIED_TRANSFORM);
}
return PixelTranslation.translate(gridToCRS, PixelOrientation.CENTER, orientation,gridDimensionX, gridDimensionY);
}
/**
* Transforms a point represented by a DirectPosition object from world
* to grid coordinates. If the point contains a {@code CoordinateReferenceSystem},
* and it differs from that of the coverage, it will be reprojected on the fly.
* The the nearest grid cell centre to the input point is found.
* <p>
* Users needing more control over the nature of the conversion can access
* the {@linkplain MathsTransform} provided by
* {@linkplain GridGeometry2D#getCRSToGrid2D(PixelOrientation) }
* which is accessed via {@linkplain #getGridGeometry()}.
*
* @param point The point in world coordinate system.
*
* @return A new point in the grid coordinate system as a GridCoordinates2D object
*
* @throws InvalidGridGeometryException if a two-dimensional inverse
* transform is not available.
*
* @throws TransformException if the transformation failed.
*
* @since 2.6
*/
public final GridCoordinates2D worldToGrid(final DirectPosition point)
throws InvalidGridGeometryException, TransformException {
final double TOL = 1.0E-6;
Point2D trPoint = toPoint2D(point);
if (gridFromCRS2D != null) {
if (Math.abs(trPoint.getX() - getEnvelope2D().getMaxX()) <= TOL) {
trPoint.setLocation(trPoint.getX() - TOL, trPoint.getY());
}
if (Math.abs(trPoint.getY() - getEnvelope2D().getMinY()) <= TOL) {
trPoint.setLocation(trPoint.getX(), trPoint.getY() + TOL);
}
GridCoordinates2D gc2D = new GridCoordinates2D();
gridFromCRS2D.transform(trPoint, gc2D);
return gc2D;
}
throw new InvalidGridGeometryException(ErrorKeys.NONINVERTIBLE_TRANSFORM);
}
/**
* Transforms a rectangle represented by an Envelope2D object from world
* to grid coordinates. If the envelope contains a {@code CoordinateReferenceSystem},
* it <b>must</b> be the same as that of this coverage, otherwise an exception
* is thrown.
* <p>
* The {@code GridEnvelope2D} returned contains the range of cells whose centers
* lie inside the input {@code Envelope2D}
* <p>
* Users needing more control over the nature of the conversion can access
* the {@linkplain MathsTransform} provided by
* {@linkplain GridGeometry2D#getCRSToGrid2D(PixelOrientation)}
* which is accessed via {@linkplain #getGridGeometry()}.
*
* @param env The envelope in world coordinate system.
* @return The corresponding rectangle in the grid coordinate system as a new
* {@code GridEnvelope2D} object
*
* @throws IllegalArgumentException if the coordinate reference system of the
* envelope is not {@code null} and does not match that of the coverage
*
* @throws InvalidGridGeometryException if a two-dimensional inverse
* transform is not available for this grid geometry.
*
* @throws TransformException if the transformation failed.
*
* @since 2.6
*/
public final GridEnvelope2D worldToGrid(final Envelope2D envelope)
throws TransformException, InvalidGridGeometryException {
// get the upper left corner transform (this is cached by the
// GridGeometry2D object)
MathTransform2D mt = getCRSToGrid2D(PixelOrientation.UPPER_LEFT);
CoordinateReferenceSystem sourceCRS = envelope.getCoordinateReferenceSystem();
if (sourceCRS != null) {
CoordinateReferenceSystem targetCRS = getCoordinateReferenceSystem();
if (!CRS.equalsIgnoreMetadata(sourceCRS, targetCRS)) {
throw new IllegalArgumentException(
Errors.format(ErrorKeys.ILLEGAL_COORDINATE_SYSTEM_FOR_CRS_$2,
sourceCRS, targetCRS));
}
}
Point2D lc = toPoint2D(envelope.getLowerCorner());
Point lcGrid = new Point();
mt.transform(lc, lcGrid);
Point2D uc = toPoint2D(envelope.getUpperCorner());
Point ucGrid = new Point();
mt.transform(uc, ucGrid);
GridEnvelope2D gridEnv = new GridEnvelope2D(
Math.min(lcGrid.x, ucGrid.x),
Math.min(lcGrid.y, ucGrid.y),
Math.abs(lcGrid.x - ucGrid.x),
Math.abs(lcGrid.y - ucGrid.y));
return gridEnv;
}
/**
* Transforms a point represented by a GridCoordinates2D object from grid
* to world coordinates. The coordinates returned are those of the centre
* of the grid cell in which the point lies.
* <p>
* Users needing more control over the nature of the conversion (e.g. calculating
* cell corner coordinates) can use the {@code MathsTransform} provided by
* {@linkplain GridGeometry2D#getGridToCRS2D(PixelOrientation) }
* which is accessed via {@linkplain #getGridGeometry()}.
*
* @param point The point in world coordinate system.
* @return A new point in the grid coordinate system as a GridCoordinates2D object
*
* @throws TransformException if the transformation failed.
*
* @throws IllegalArgumentException if the point lies outside the coverage
*
* @since 2.6
*/
public final DirectPosition gridToWorld(final GridCoordinates2D point)
throws TransformException {
if (getGridRange2D().contains(point)) {
Point2D trPoint = getGridToCRS2D().transform(point, null);
return new DirectPosition2D(getCoordinateReferenceSystem2D(),
trPoint.getX(), trPoint.getY());
} else {
throw new IllegalArgumentException(
Errors.format(ErrorKeys.POINT_OUTSIDE_COVERAGE_$1, point));
}
}
/**
* Transforms a rectangle represented by a GridEnvelope2D object from grid
* to world coordinates. The bounds of the Envelope2D object returned
* correspond to the outer edges of the grid cells within the input envelope.
* <p>
* Users needing more control over the nature of the conversion
* can use the {@code MathsTransform} provided by
* {@linkplain GridGeometry2D#getGridToCRS2D(PixelOrientation) }
* which is accessed via {@linkplain #getGridGeometry()}.
*
* @param gridEnv The rectangle of grid coordinates to convert
* @return World coordinates of the rectangle as a new Envelope2D object
*
* @throws TransformException if the transformation failed.
*
* @throws IllegalArgumentException if the input rectangle lies outside
* the coverage
*
* @since 2.6
*/
public final Envelope2D gridToWorld(final GridEnvelope2D gridEnv)
throws TransformException {
MathTransform2D mt = getGridToCRS2D();
if (getGridRange2D().contains(gridEnv)) {
GridCoordinates2D low = gridEnv.getLow();
Point2D trLow = mt.transform(new Point2D.Double(low.x - 0.5, low.y - 0.5), null);
GridCoordinates2D high = gridEnv.getHigh();
Point2D trHigh = mt.transform(new Point2D.Double(high.x + 0.5, high.y + 0.5), null);
return new Envelope2D(
new DirectPosition2D(crs2D, trLow.getX(), trLow.getY()),
new DirectPosition2D(crs2D, trHigh.getX(), trHigh.getY()));
} else {
throw new IllegalArgumentException(
Errors.format(ErrorKeys.POINT_OUTSIDE_COVERAGE_$1, gridEnv));
}
}
/**
* Converts the specified point into a two-dimensional one.
*
* @param point The point to transform into a {@link Point2D} object.
* @return The specified point as a {@link Point2D} object.
* @throws CannotEvaluateException if a reprojection was required and failed.
* @throws MismatchedDimensionException if the point doesn't have the expected dimension.
*/
Point2D toPoint2D(final DirectPosition point)
throws CannotEvaluateException, MismatchedDimensionException
{
/*
* If the point contains a CRS, transforms the point on the fly
*/
final CoordinateReferenceSystem sourceCRS = point.getCoordinateReferenceSystem();
if (sourceCRS != null) {
synchronized (this) {
if (arbitraryToInternal == null) {
final CoordinateReferenceSystem targetCRS = getCoordinateReferenceSystem2D();
arbitraryToInternal = new TransformedDirectPosition(sourceCRS, targetCRS, null);
}
try {
arbitraryToInternal.transform(point);
} catch (TransformException exception) {
throw new CannotEvaluateException(Errors.format(
ErrorKeys.CANT_EVALUATE_$1,
AbstractGridCoverage.toString(point, Locale.getDefault())), exception);
}
return arbitraryToInternal.toPoint2D();
}
}
/*
* If the point did not contains any CRS, take only the axis specified by the grid
* geometry and copy in a new Point2D instance.
*
* Note: this method was previously in GridCoverage2D and, at this point, there was
* a check that the number of point dimensions were the same as that of the coverage's
* CRS. Here this is modified to just check that the point is at least 2D - mbedward
*/
if (point.getDimension() < 2) {
throw new MismatchedDimensionException(Errors.format(
ErrorKeys.MISMATCHED_DIMENSION_$2, point.getDimension(), 2));
}
if (point instanceof Point2D) {
return (Point2D) point;
}
assert axisDimensionX < axisDimensionY;
return new Point2D.Double(point.getOrdinate(axisDimensionX),
point.getOrdinate(axisDimensionY));
}
/**
* Transforms a point using the inverse of {@link #getGridToCRS2D()}.
*
* @param point The point in logical coordinate system.
* @return A new point in the grid coordinate system.
* @throws InvalidGridGeometryException if a two-dimensional inverse
* transform is not available for this grid geometry.
* @throws CannotEvaluateException if the transformation failed.
*/
final Point2D inverseTransform(final Point2D point) throws InvalidGridGeometryException {
if (gridFromCRS2D != null) {
try {
return gridFromCRS2D.transform(point, null);
} catch (TransformException exception) {
throw new CannotEvaluateException(Errors.format(ErrorKeys.CANT_EVALUATE_$1,
AbstractGridCoverage.toString(point, Locale.getDefault()), exception));
}
}
throw new InvalidGridGeometryException(ErrorKeys.NO_TRANSFORM2D_AVAILABLE);
}
/**
* Returns the pixel coordinate of a rectangle containing the
* specified geographic area. If the rectangle can't be computed,
* then this method returns {@code null}.
*/
final Rectangle inverseTransform(Rectangle2D bounds) {
if (bounds!=null && gridFromCRS2D!=null) {
try {
bounds = org.geotools.referencing.CRS.transform(gridFromCRS2D, bounds, null);
final int xmin = (int) Math.floor(bounds.getMinX() - 0.5);
final int ymin = (int) Math.floor(bounds.getMinY() - 0.5);
final int xmax = (int) Math.ceil (bounds.getMaxX() - 0.5);
final int ymax = (int) Math.ceil (bounds.getMaxY() - 0.5);
return new Rectangle(xmin, ymin, xmax-xmin, ymax-ymin);
} catch (TransformException exception) {
// Ignore, since this method is invoked from 'GridCoverage.prefetch' only.
// It doesn't matter if the transformation failed; 'prefetch' is just a hint.
}
}
return null;
}
/**
* Compares the specified object with this grid geometry for equality.
*/
@Override
public boolean equals(final Object object) {
if (super.equals(object)) {
final GridGeometry2D that = (GridGeometry2D) object;
return this.gridDimensionX == that.gridDimensionX &&
this.gridDimensionY == that.gridDimensionY &&
this.axisDimensionX == that.axisDimensionX &&
this.axisDimensionY == that.axisDimensionY;
// Do not compare cornerToCRS2D since it may not be computed yet,
// and should be strictly derived from gridToCRS2D anyway.
}
return false;
}
/**
* Checks if the bounding box of the specified image is consistents with the specified
* grid geometry. If an inconsistency has been found, then an error string is returned.
* This string will be typically used as a message in an exception to be thrown.
* <p>
* Note that a succesful check at construction time may fails later if the image is part
* of a JAI chain (i.e. is a {@link javax.media.jai.RenderedOp}) and its bounds has been
* edited (i.e the image node as been re-rendered). Since {@code GridCoverage2D} are immutable
* by design, we are not allowed to propagate the image change here. The {@link #getGridGeometry}
* method will thrown an {@link IllegalStateException} in this case.
*/
static String checkConsistency(final RenderedImage image, final GridGeometry2D grid) {
final GridEnvelope range = grid.getGridRange();
final int dimension = range.getDimension();
for (int i=0; i<dimension; i++) {
final int min, length;
final Object label;
if (i == grid.gridDimensionX) {
min = image.getMinX();
length = image.getWidth();
label = "\"X\"";
} else if (i == grid.gridDimensionY) {
min = image.getMinY();
length = image.getHeight();
label = "\"Y\"";
} else {
min = range.getLow(i);
length = Math.min(Math.max(range.getHigh(i)+1, 0), 1);
label = Integer.valueOf(i);
}
if (range.getLow(i)!=min || range.getSpan(i)!=length) {
return Errors.format(ErrorKeys.BAD_GRID_RANGE_$3, label, min, min + length);
}
}
return null;
}
}