package ch.hsr.geohash.util;
import ch.hsr.geohash.BoundingBox;
import ch.hsr.geohash.GeoHash;
/**
* Created by IntelliJ IDEA. User: kevin Date: Jan 17, 2011 Time: 12:03:47 PM
*/
public class TwoGeoHashBoundingBox {
private BoundingBox boundingBox;
private GeoHash bottomLeft;
private GeoHash topRight;
public static TwoGeoHashBoundingBox withCharacterPrecision(BoundingBox bbox, int numberOfCharacters) {
GeoHash bottomLeft = GeoHash.withCharacterPrecision(bbox.getMinLat(), bbox.getMinLon(), numberOfCharacters);
GeoHash topRight = GeoHash.withCharacterPrecision(bbox.getMaxLat(), bbox.getMaxLon(), numberOfCharacters);
return new TwoGeoHashBoundingBox(bottomLeft, topRight);
}
public static TwoGeoHashBoundingBox withBitPrecision(BoundingBox bbox, int numberOfBits) {
GeoHash bottomLeft = GeoHash.withBitPrecision(bbox.getMinLat(), bbox.getMinLon(), numberOfBits);
GeoHash topRight = GeoHash.withBitPrecision(bbox.getMaxLat(), bbox.getMaxLon(), numberOfBits);
return new TwoGeoHashBoundingBox(bottomLeft, topRight);
}
public static TwoGeoHashBoundingBox fromBase32(String base32) {
String bottomLeft = base32.substring(0, 7);
String topRight = base32.substring(7);
return new TwoGeoHashBoundingBox(GeoHash.fromGeohashString(bottomLeft), GeoHash.fromGeohashString(topRight));
}
public TwoGeoHashBoundingBox(GeoHash bottomLeft, GeoHash topRight) {
if (bottomLeft.significantBits() != topRight.significantBits()) {
throw new IllegalArgumentException(
"Does it make sense to iterate between hashes that have different precisions?");
}
this.bottomLeft = GeoHash.fromLongValue(bottomLeft.longValue(), bottomLeft.significantBits());
this.topRight = GeoHash.fromLongValue(topRight.longValue(), topRight.significantBits());
this.boundingBox = this.bottomLeft.getBoundingBox();
this.boundingBox.expandToInclude(this.topRight.getBoundingBox());
}
public BoundingBox getBoundingBox() {
return boundingBox;
}
public GeoHash getBottomLeft() {
return bottomLeft;
}
public GeoHash getTopRight() {
return topRight;
}
public String toBase32() {
return bottomLeft.toBase32() + topRight.toBase32();
}
}