[FIX] 대중교통 길찾기의 환승 방식 조정

src/main/java/com/wayble/server/direction/dto/TransportationGraphDto.java

@@ -0,0 +1,12 @@
+package com.wayble.server.direction.dto;
+
+import com.wayble.server.direction.entity.transportation.Edge;
+import org.springframework.data.util.Pair;
+
+import java.util.List;
+import java.util.Map;
+
+public record TransportationGraphDto( // 노드별 연결 정보와 엣지별 가중치를 함께 관리하기 위한 dto
+    Map<Long, List<Edge>> graph, // 노드별 연결 정보
+    Map<Pair<Long, Long>, Integer> weightMap // 엣지별 가중치
+) {}

src/main/java/com/wayble/server/direction/entity/transportation/Edge.java

@@ -21,17 +21,17 @@ public class Edge {
     private DirectionType edgeType;
 
     // 출발 노드
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "start_node_id")
     private Node startNode;
 
     // 도착 노드
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "end_node_id")
     private Node endNode;
 
     // 해당 연결이 속한 노선
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "route_id")
     private Route route;
 

src/main/java/com/wayble/server/direction/entity/transportation/Facility.java

@@ -38,7 +38,7 @@ public class Facility {
     @OneToMany(mappedBy = "facility", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     private List<Elevator> elevators;
 
-    @OneToOne
+    @OneToOne(fetch = FetchType.LAZY)
     @MapsId
     @JoinColumn(name = "id")
     private Node node;

src/main/java/com/wayble/server/direction/entity/transportation/Node.java

@@ -6,6 +6,8 @@
 import java.util.List;
 import java.util.Objects;
 
+import org.hibernate.annotations.BatchSize;
+
 import com.wayble.server.direction.entity.DirectionType;
 
 @Entity
@@ -32,23 +34,24 @@ public class Node {
     private Double longitude;
 
     // 출발 edge 리스트 (정류장에서 출발)
-    @OneToMany(mappedBy = "startNode")
+    @OneToMany(mappedBy = "startNode", fetch = FetchType.LAZY)
+    @BatchSize(size = 100)
     private List<Edge> outgoingEdges;
 
     // 도착 Edge 리스트 (정류장으로 도착)
-    @OneToMany(mappedBy = "endNode")
+    @OneToMany(mappedBy = "endNode", fetch = FetchType.LAZY)
+    @BatchSize(size = 100)
     private List<Edge> incomingEdges;
 
     // 이 정류장이 기점/종점인 노선
-    @OneToMany(mappedBy = "startNode")
+    @OneToMany(mappedBy = "startNode", fetch = FetchType.LAZY)
+    @BatchSize(size = 100)
     private List<Route> startRoutes;
 
-    @OneToMany(mappedBy = "endNode")
+    @OneToMany(mappedBy = "endNode", fetch = FetchType.LAZY)
+    @BatchSize(size = 100)
     private List<Route> endRoutes;
 
-    @OneToOne(mappedBy = "node")
-    private Facility facility_id;
-
     public Node(Long id, String stationName, DirectionType nodeType, double latitude, double longitude) {
         this.id = id;
         this.stationName = stationName;
@@ -57,6 +60,10 @@ public Node(Long id, String stationName, DirectionType nodeType, double latitude
         this.longitude = longitude;
     }
 
+    public static Node createNode(Long id, String stationName, DirectionType nodeType, double latitude, double longitude) {
+        return new Node(id, stationName, nodeType, latitude, longitude);
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

src/main/java/com/wayble/server/direction/repository/EdgeRepository.java

@@ -2,6 +2,16 @@
 
 import com.wayble.server.direction.entity.transportation.Edge;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
+@Repository
 public interface EdgeRepository extends JpaRepository<Edge, Long> {
+    @Query("SELECT DISTINCT e FROM Edge e " +
+           "JOIN FETCH e.startNode " +
+           "JOIN FETCH e.endNode " +
+           "LEFT JOIN FETCH e.route")
+    List<Edge> findAllWithNodesAndRoute();
 }