From aa19e881517c65bd05cadbbed96e57682e481b9b Mon Sep 17 00:00:00 2001
From: bertrand <bpinel@ippon.fr>
Date: Fri, 15 Sep 2017 11:35:58 +0200
Subject: [PATCH] Add Web service to retrieve cities inside a given perimeter
---
.../fr/ippon/geohipster/domain/Geocity.java | 21 ++++++++++++++++
.../repository/GeocityRepository.java | 7 +++++-
.../geohipster/service/GeocityService.java | 12 ++++++++++
.../service/impl/GeocityServiceImpl.java | 15 ++++++++++++
.../geohipster/web/rest/GeocityResource.java | 24 +++++++++++++++++++
.../20170914101249_added_entity_Geocity.xml | 5 ++++
6 files changed, 83 insertions(+), 1 deletion(-)
diff --git a/src/main/java/fr/ippon/geohipster/domain/Geocity.java b/src/main/java/fr/ippon/geohipster/domain/Geocity.java
index 8c2907e..7c728b9 100644
--- a/src/main/java/fr/ippon/geohipster/domain/Geocity.java
+++ b/src/main/java/fr/ippon/geohipster/domain/Geocity.java
@@ -36,6 +36,11 @@ public class Geocity implements Serializable {
@Column(name = "location")
private Point location;
+ @Expose
+ private double lat;
+ @Expose
+ private double lon;
+
@Column(name = "featureclass")
private String featureclass;
@@ -269,6 +274,22 @@ public class Geocity implements Serializable {
this.location = location;
}
+ public double getLat() {
+ return lat;
+ }
+
+ public void setLat(double lat) {
+ this.lat = lat;
+ }
+
+ public double getLon() {
+ return lon;
+ }
+
+ public void setLon(double lon) {
+ this.lon = lon;
+ }
+
@Override
public boolean equals(Object o) {
if (this == o) {
diff --git a/src/main/java/fr/ippon/geohipster/repository/GeocityRepository.java b/src/main/java/fr/ippon/geohipster/repository/GeocityRepository.java
index b690549..a471f45 100644
--- a/src/main/java/fr/ippon/geohipster/repository/GeocityRepository.java
+++ b/src/main/java/fr/ippon/geohipster/repository/GeocityRepository.java
@@ -1,10 +1,14 @@
package fr.ippon.geohipster.repository;
import fr.ippon.geohipster.domain.Geocity;
+import org.geolatte.geom.Geometry;
+import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import org.springframework.data.jpa.repository.*;
+import java.util.List;
+
/**
* Spring Data JPA repository for the Geocity entity.
@@ -12,5 +16,6 @@ import org.springframework.data.jpa.repository.*;
@SuppressWarnings("unused")
@Repository
public interface GeocityRepository extends JpaRepository<Geocity,Long> {
-
+ @Query("SELECT c FROM Geocity c WHERE dwithin(c.location, :point, :dist)=true")
+ public List<Geocity> findCityWithinCircle(@Param("point")Geometry point, @Param("dist")float dist);
}
diff --git a/src/main/java/fr/ippon/geohipster/service/GeocityService.java b/src/main/java/fr/ippon/geohipster/service/GeocityService.java
index ba5c696..2a0d974 100644
--- a/src/main/java/fr/ippon/geohipster/service/GeocityService.java
+++ b/src/main/java/fr/ippon/geohipster/service/GeocityService.java
@@ -4,6 +4,8 @@ import fr.ippon.geohipster.domain.Geocity;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
+import java.util.List;
+
/**
* Service Interface for managing Geocity.
*/
@@ -39,4 +41,14 @@ public interface GeocityService {
* @param id the id of the entity
*/
void delete(Long id);
+
+ /**
+ *
+ * @param lat : latitude for center point
+ * @param lon : longitude for center point
+ * @param radius : radius in meters for the search
+ * @return
+ */
+ List<Geocity> findCitiesWithinCircle(float lat, float lon, int radius);
+
}
diff --git a/src/main/java/fr/ippon/geohipster/service/impl/GeocityServiceImpl.java b/src/main/java/fr/ippon/geohipster/service/impl/GeocityServiceImpl.java
index c0ae096..df53dde 100644
--- a/src/main/java/fr/ippon/geohipster/service/impl/GeocityServiceImpl.java
+++ b/src/main/java/fr/ippon/geohipster/service/impl/GeocityServiceImpl.java
@@ -3,6 +3,10 @@ package fr.ippon.geohipster.service.impl;
import fr.ippon.geohipster.service.GeocityService;
import fr.ippon.geohipster.domain.Geocity;
import fr.ippon.geohipster.repository.GeocityRepository;
+import org.geolatte.geom.G2D;
+import org.geolatte.geom.Point;
+import org.geolatte.geom.Position;
+import org.geolatte.geom.crs.CrsRegistry;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.domain.Page;
@@ -10,6 +14,8 @@ import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
+import java.util.List;
+
/**
* Service Implementation for managing Geocity.
@@ -74,4 +80,13 @@ public class GeocityServiceImpl implements GeocityService{
log.debug("Request to delete Geocity : {}", id);
geocityRepository.delete(id);
}
+
+ @Override
+ public List<Geocity> findCitiesWithinCircle(float lat, float lon, int radius) {
+ Position g2d = new G2D(lon, lat);
+ Point point = new Point(g2d, CrsRegistry.getCoordinateReferenceSystemForEPSG(4326, null));
+ float geoRadius = radius/110.0f;
+
+ List<Geocity> cities = geocityRepository.findCityWithinCircle(point, geoRadius);
+ return cities; }
}
diff --git a/src/main/java/fr/ippon/geohipster/web/rest/GeocityResource.java b/src/main/java/fr/ippon/geohipster/web/rest/GeocityResource.java
index 94af5aa..da553a5 100644
--- a/src/main/java/fr/ippon/geohipster/web/rest/GeocityResource.java
+++ b/src/main/java/fr/ippon/geohipster/web/rest/GeocityResource.java
@@ -1,6 +1,8 @@
package fr.ippon.geohipster.web.rest;
import com.codahale.metrics.annotation.Timed;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
import fr.ippon.geohipster.domain.Geocity;
import fr.ippon.geohipster.service.GeocityService;
import fr.ippon.geohipster.web.rest.util.HeaderUtil;
@@ -15,6 +17,7 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
+import org.springframework.data.repository.query.Param;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
@@ -30,6 +33,8 @@ import java.net.URISyntaxException;
import java.util.List;
import java.util.Optional;
+import static org.springframework.web.bind.annotation.RequestMethod.GET;
+
/**
* REST controller for managing Geocity.
*/
@@ -134,6 +139,22 @@ public class GeocityResource {
return ResponseEntity.ok().headers(HeaderUtil.createEntityDeletionAlert(ENTITY_NAME, id.toString())).build();
}
+ /**
+ *
+ * @param lat : Latitude for the center of the circle
+ * @param lon : longitude for the center of the circle
+ * @param radius : radius of the circle in kilometers
+ * @return
+ */
+ @RequestMapping(value = "/geocities", method = GET, params = { "lat", "lon", "radius"})
+ @Timed
+ public String getGeocitiesWithinCircle(@Param("lat") float lat, @Param("lon")float lon, @Param("radius") int radius) {
+ Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create(); // new Gson();
+ List<Geocity> cities = geocityService.findCitiesWithinCircle(lat, lon, radius);
+
+ return gson.toJson(cities);
+ }
+
@GetMapping("/loadGeoNamesCities")
public void loadGeoNamesCities(){
log.info("Loading GeoName file "+FRGeonamesCityFile);
@@ -154,6 +175,9 @@ public class GeocityResource {
Position g2d = new G2D(new Double(columns[5]), new Double(columns[4]));
Point point = new Point(g2d, CrsRegistry.getCoordinateReferenceSystemForEPSG(4326, null));
geocity.setLocation(point);
+ // Also copy lat / lon to duplicate columns in the Database
+ geocity.setLat(new Double(columns[4]));
+ geocity.setLon(new Double(columns[5]));
geocity.setFeatureclass(columns[6]);
geocity.setFeaturetype(columns[7]);
diff --git a/src/main/resources/config/liquibase/changelog/20170914101249_added_entity_Geocity.xml b/src/main/resources/config/liquibase/changelog/20170914101249_added_entity_Geocity.xml
index 507638c..be6f987 100644
--- a/src/main/resources/config/liquibase/changelog/20170914101249_added_entity_Geocity.xml
+++ b/src/main/resources/config/liquibase/changelog/20170914101249_added_entity_Geocity.xml
@@ -30,7 +30,12 @@
<column name="alternatenames" type="varchar(1000)">
<constraints nullable="true" />
</column>
+
<column name="location" type="geometry(Point, 4326)"/>
+ <!-- We keep lat / lng column for better visibility of data -->
+ <column name="lat" type="float4"/>
+ <column name="lon" type="float4"/>
+
<column name="featureclass" type="varchar(255)">
<constraints nullable="true" />
</column>
--
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