Author: stianh
Date: 2007-05-09 11:00:37 +0200 (Wed, 09 May 2007)
New Revision: 5026
Added:
trunk/core-api/src/main/java/no/schibstedsok/searchportal/util/GeoSearchUtil.java
Log:
Added utility class for GeoSearch SEARCH-225
Added:
trunk/core-api/src/main/java/no/schibstedsok/searchportal/util/GeoSearchUtil.java
===================================================================
---
trunk/core-api/src/main/java/no/schibstedsok/searchportal/util/GeoSearchUtil.java
(rev 0)
+++
trunk/core-api/src/main/java/no/schibstedsok/searchportal/util/GeoSearchUtil.java
2007-05-09 09:00:37 UTC (rev 5026)
@@ -0,0 +1,99 @@
+/*
+ * $Id:$
+ */
+package no.schibstedsok.searchportal.util;
+
+import javax.measure.units.SI;
+
+
+import no.schibstedsok.searchportal.datamodel.request.ParametersDataObject;
+
+import org.apache.log4j.Logger;
+import org.jscience.geography.coordinates.LatLong;
+import org.jscience.geography.coordinates.UTM;
+import org.jscience.geography.coordinates.crs.ReferenceEllipsoid;
+/**
+ * Utility class for GEO search.
+ *
+ * @author <a href="mailto:[EMAIL PROTECTED]">Anders Johan Jamtli</a>
+ * @author Stian Hegglund.
+ * @version $Revision:$
+ */
+public class GeoSearchUtil {
+
+ /** Logger for this class. */
+ private static final Logger LOG = Logger.getLogger(GeoSearchUtil.class);
+
+ /** Constants for selected map rectangel. */
+ private static final String MIN_X = "minX";
+ private static final String MAX_X = "maxX";
+ private static final String MIN_Y = "minY";
+ private static final String MAX_Y = "maxY";
+
+ /** Measure unit to use. */
+ public static final String RADIUS_MEASURE_UNIT_TYPE = "km";
+
+ /** The sort by to use when the search is a geo search. */
+ public static final String GEO_SORT_BY = "geo_spec_sortable";
+
+ /** Utility class, should be used by calling static methods. */
+ private GeoSearchUtil(){
+
+ }
+
+
+ /**
+ * Calcluates a center point from minX,maxX,minY,maxY parameters.
+ * @param requestParameters Parameters for the request.
+ * @return The center point in latlong format.
+ */
+ public static String getCenter(final ParametersDataObject
requestParameters){
+
+ if(!isGeoSearch(requestParameters)){
+ throw new IllegalArgumentException("Given requestParameter object
must contain parameters: minX,maxX,minY,maxY");
+ }
+
+ final int minX = Integer.parseInt((String)
requestParameters.getValue(MIN_X).getString());
+ final int maxX = Integer.parseInt((String)
requestParameters.getValue(MAX_X).getString());
+ final int minY = Integer.parseInt((String)
requestParameters.getValue(MIN_Y).getString());
+ final int maxY = Integer.parseInt((String)
requestParameters.getValue(MAX_Y).getString());
+
+ final UTM utmMin = UTM.valueOf(33, 'W', minX, minY, SI.METER);
+ final UTM utmMax = UTM.valueOf(33, 'W', maxX, maxY, SI.METER);
+
+ final LatLong llMin = UTM.utmToLatLong(utmMin,
ReferenceEllipsoid.WGS84);
+ final LatLong llMax = UTM.utmToLatLong(utmMax,
ReferenceEllipsoid.WGS84);
+
+ final double llMinX = llMin.longitudeValue(SI.RADIAN);
+ final double llMaxX = llMax.longitudeValue(SI.RADIAN);
+ final double llMinY = llMin.latitudeValue(SI.RADIAN);
+ final double llMaxY = llMax.latitudeValue(SI.RADIAN);
+
+ LOG.debug("(" + minX + "," + minY + ") (" + llMinX + "," + llMinY +
")");
+ LOG.debug("(" + maxX + "," + maxY + ") (" + llMaxX + "," + llMaxY +
")");
+
+ final String center = new StringBuilder("(").append(llMinX + (llMaxX -
llMinX) / 2).append(",")
+ .append(llMinY + (llMaxY - llMinY) / 2).append(")").toString();
+ return center;
+
+ }
+
+ /**
+ * Responsible for checking if a ParameterDataObject is a geosearch.
+ * @param requestParameters
+ * @return true if the given parameter object contains minX,maxX,minY,maxY
values.
+ */
+ public static boolean isGeoSearch(final ParametersDataObject
requestParameters) {
+
+ if (requestParameters.getValue(MIN_X) == null ||
requestParameters.getValue(MAX_X) == null || requestParameters.getValue(MIN_Y)
== null
+ || requestParameters.getValue(MAX_Y) == null) {
+ return false;
+ }
+
+ if (requestParameters.getValue(MIN_X).getString() == null ||
requestParameters.getValue(MAX_X).getString() == null ||
requestParameters.getValue(MIN_Y).getString() == null
+ || requestParameters.getValue(MAX_Y).getString() == null) {
+ return false;
+ }
+ return true;
+ }
+}
\ No newline at end of file
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