如何在springboot中查询引用类型的Firestore数据库？

<dependency>
    <groupId>com.google.cloud</groupId>
    <artifactId>google-cloud-firestore</artifactId>
    <version>2.3.0</version>
</dependency>

import com.google.api.core.ApiFuture;
import com.google.cloud.firestore.DocumentReference;
import com.google.cloud.firestore.Firestore;
import com.google.cloud.firestore.Query;
import com.google.cloud.firestore.QueryDocumentSnapshot;
import com.google.cloud.firestore.QuerySnapshot;
import com.google.cloud.firestore.WriteResult;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Service
public class FirestoreService {

    private final Firestore firestore;

    public FirestoreService(Firestore firestore) {
        this.firestore = firestore;
    }

    public List<YourEntity> queryEntities() throws ExecutionException, InterruptedException {
        ApiFuture<QuerySnapshot> future = firestore.collection("your_collection").get();
        QuerySnapshot querySnapshot = future.get();
        List<QueryDocumentSnapshot> documents = querySnapshot.getDocuments();

        // 处理查询结果
        List<YourEntity> entities = new ArrayList<>();
        for (QueryDocumentSnapshot document : documents) {
            YourEntity entity = document.toObject(YourEntity.class);
            entities.add(entity);
        }

        return entities;
    }
}

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;
import java.util.concurrent.ExecutionException;

@RestController
public class YourController {

    private final FirestoreService firestoreService;

    public YourController(FirestoreService firestoreService) {
        this.firestoreService = firestoreService;
    }

    @GetMapping("/entities")
    public List<YourEntity> getEntities() throws ExecutionException, InterruptedException {
        return firestoreService.queryEntities();
    }
}