ServiceImplementation.java

import java.util.ArrayList;
import java.util.List;

public interface Address {
    String getStreet();
    String getCity();
    String getPostalCode();
    String getCountry();
}

public class RoutePlannerAdapter implements IDUServiceRoutePlanner {

    // Assume there's a method to make HTTP requests to the API server
    private HttpClient httpClient;

    // Constructor for injecting the HttpClient

    public RoutePlannerAdapter(HttpClient httpClient) {
        this.httpClient = httpClient;
    }

    @Override
    public RouteDetails requestRouteAndEstimates(Address startLocation, Address targetLocation, String transportMeans) {
        // Prepare request body
        RouteRequest request = new RouteRequest(startLocation, targetLocation, transportMeans);

        // Make HTTP POST request to the API endpoint
        HttpResponse<JsonNode> response = httpClient.post("https://example.com/api/route-planner", request);

        // Parse response
        if (response.getStatus() == 200) {
            return parseRouteDetails(response.getBody());
        } else {
            throw new RuntimeException("Failed to retrieve route details: " + response.getStatusText());
        }
    }

    private RouteDetails parseRouteDetails(JsonNode responseBody) {
        // Parse JSON response and create RouteDetails object
        // Implement according to the structure of the JSON response
        // For simplicity, let's assume the structure matches RouteDetails schema
        String estimatedTime = responseBody.get("estimatedTime").asText();
        String distance = responseBody.get("distance").asText();
        List<Address> waypoints = new ArrayList<>();
        // Parse waypoints if available
        if (responseBody.has("waypoints")) {
            JsonNode waypointsNode = responseBody.get("waypoints");
            for (JsonNode waypointNode : waypointsNode) {
                Address waypoint = parseAddress(waypointNode);
                waypoints.add(waypoint);
            }
        }
        return new RouteDetails(estimatedTime, distance, waypoints);
    }

    private Address parseAddress(JsonNode addressNode) {
        // Parse JSON node representing an address and create Address object
        // Implement according to the structure of the JSON response
        // For simplicity, let's assume the structure matches Address schema
        String street = addressNode.get("street").asText();
        String city = addressNode.get("city").asText();
        String postalCode = addressNode.get("postalCode").asText();
        String country = addressNode.get("country").asText();
        return new Address(street, city, postalCode, country);
    }
}