/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, 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.data.ows;
import org.geotools.geometry.GeneralDirectPosition;
import org.geotools.referencing.CRS;
import org.geotools.referencing.crs.DefaultEngineeringCRS;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.Envelope;
import org.opengis.referencing.FactoryException;
import org.opengis.referencing.NoSuchAuthorityCodeException;
import org.opengis.referencing.crs.CoordinateReferenceSystem;
/**
* A pair of coordinates and a reference system that represents a section of the Earth
*
* @author Richard Gould
*
* @source $URL$
* http://svn.osgeo.org/geotools/branches/2.6.x/modules/extension/wms/src/main/java/org
* /geotools/data/ows/CRSEnvelope.java $
*/
public class CRSEnvelope implements Envelope {
/**
* Represents the Coordinate Reference System this bounding box is in. This is usually an EPSG
* code such as "EPSG:4326"
*/
private String srsName;
protected double minX;
protected double minY;
protected double maxX;
protected double maxY;
private CoordinateReferenceSystem crs;
/**
* Construct an empty BoundingBox
*/
public CRSEnvelope() {
}
/**
* Create a bounding box with the specified properties
*
* @param epsgCode
* The Coordinate Reference System this bounding box is in
* @param minX
* @param minY
* @param maxX
* @param maxY
*/
public CRSEnvelope(String epsgCode, double minX, double minY, double maxX, double maxY) {
this.srsName = epsgCode;
this.minX = minX;
this.maxX = maxX;
this.minY = minY;
this.maxY = maxY;
}
public CRSEnvelope(Envelope envelope) {
this.srsName = envelope.getCoordinateReferenceSystem().getIdentifiers().iterator().next().toString();
//this.srsName = epsgCode;
this.minX = envelope.getMinimum(0);
this.maxX = envelope.getMaximum(0);
this.minY = envelope.getMinimum(1);
this.maxY = envelope.getMaximum(1);
}
/**
* Returns the coordinate reference system for this envelope (if known).
* return CoordinateReferenceSystem if known, or {@code null}
*/
public CoordinateReferenceSystem getCoordinateReferenceSystem() {
synchronized (this) {
if (crs == null) {
try {
crs = CRS.decode(srsName);
} catch (NoSuchAuthorityCodeException e) {
crs = DefaultEngineeringCRS.CARTESIAN_2D;
} catch (FactoryException e) {
crs = DefaultEngineeringCRS.CARTESIAN_2D;
}
}
return crs == DefaultEngineeringCRS.CARTESIAN_2D ? null : crs;
}
}
/**
* The CRS is bounding box's Coordinate Reference System
*
* @return the CRS/SRS value
*/
public String getSRSName() {
return srsName;
}
/**
* @see setSRSName
*/
public void setEPSGCode(String epsgCode) {
setSRSName(epsgCode);
}
/**
* @see getSRSName
*/
public String getEPSGCode() {
return srsName;
}
/**
* The CRS is bounding box's Coordinate Reference System
*
* @param srsName
* The SRSName for this envelope; usually an EPSG code
*/
public void setSRSName(String epsgCode) {
this.srsName = epsgCode;
}
public int getDimension() {
return 2;
}
public double getMinimum(int dimension) {
if (dimension == 0) {
return getMinX();
}
return getMinY();
}
public double getMaximum(int dimension) {
if (dimension == 0) {
return getMaxX();
}
return getMaxY();
}
public double getCenter(int dimension) {
return getMedian(dimension);
}
public double getMedian(int dimension) {
double min;//, max;
if (dimension == 0) {
min = getMinX();
//max = getMaxX();
} else {
min = getMinY();
//max = getMaxY();
}
return min + (getLength(dimension) / 2);
}
public double getLength(int dimension) {
return getSpan(dimension);
}
public double getSpan(int dimension) {
double min, max;
if (dimension == 0) {
min = getMinX();
max = getMaxX();
} else {
min = getMinY();
max = getMaxY();
}
return max - min;
}
public DirectPosition getUpperCorner() {
return new GeneralDirectPosition(getMaxX(), getMaxY());
}
public DirectPosition getLowerCorner() {
return new GeneralDirectPosition(getMinX(), getMinY());
}
/**
* The maxX value is the higher X coordinate value
*
* @return the bounding box's maxX value
*/
public double getMaxX() {
return maxX;
}
/**
* The maxX value is the higher X coordinate value
*
* @param maxX
* the new value for maxX. Should be greater than minX.
*/
public void setMaxX(double maxX) {
this.maxX = maxX;
}
/**
* The maxY value is the higher Y coordinate value
*
* @return the bounding box's maxY value
*/
public double getMaxY() {
return maxY;
}
/**
* The maxY value is the higher Y coordinate value
*
* @param maxY
* the new value for maxY. Should be greater than minY.
*/
public void setMaxY(double maxY) {
this.maxY = maxY;
}
/**
* The minX value is the lower X coordinate value
*
* @return the bounding box's minX value
*/
public double getMinX() {
return minX;
}
/**
* The minX value is the lower X coordinate value
*
* @param minX
* the new value for minX. Should be less than maxX.
*/
public void setMinX(double minX) {
this.minX = minX;
}
/**
* The minY value is the lower Y coordinate value
*
* @return the bounding box's minY value
*/
public double getMinY() {
return minY;
}
/**
* The minY value is the lower Y coordinate value
*
* @param minY
* the new value for minY. Should be less than maxY.
*/
public void setMinY(double minY) {
this.minY = minY;
}
public String toString() {
return srsName.toString() + " [" + minX + "," + minY + " " + maxX + "," + maxY + "]";
}
}