Climatiq java example

1_main.java

import com.fasterxml.jackson.databind.ObjectMapper;
import models.ClimatiqEstimateResponse;
import org.apache.hc.client5.http.classic.methods.HttpPost;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.http.io.entity.EntityUtils;
import org.apache.hc.core5.http.io.entity.StringEntity;

// Example of how to use Java to use the climatiq API
// This example requires jackson and apache's HttpClient to be installed into the project
public class Main {
    public static void main(String[] args) throws Exception {

        try(CloseableHttpClient client = HttpClients.createDefault()){
            //1. ---------------------- Make the request
            HttpPost httpPost = new HttpPost("https://beta3.api.climatiq.io/estimate");

            // Add the header with your API key
            httpPost.addHeader("Authorization", "Bearer: YOUR_API_KEY_HERE");

            // Send some JSON. In a bigger example you would construct this JSON via Java objects
            var requestJson = "{\n" +
                    "\t\"emission_factor\": {\n" +
                    "\t\t\"id\": \"accommodation_type_hotel_stay\",\n" +
                    "\t\t\"region\": \"CA\"\n" +
                    "\t},\n" +
                    "\t\"parameters\": {\n" +
                    "\t\t\"number\": 2\n" +
                    "\t}\n" +
                    "}";


            httpPost.setEntity(new StringEntity(requestJson));
            var httpResponse = client.execute(httpPost);

            // 2. -------------------- Parse the response
            System.out.println(httpResponse); // Print out the status code
            var httpBody = EntityUtils.toString(httpResponse.getEntity());
            System.out.println(httpBody); // Print out the raw body


            // Transform the raw body into a Java object
            ObjectMapper objectMapper = new ObjectMapper();

            var parsedResponse = objectMapper.readValue(httpBody, ClimatiqEstimateResponse.class);

            System.out.println(parsedResponse.co2e);

        }
    }
}

ClimatiqEstimateResponse.java

package models;

public class ClimatiqEstimateResponse {
    public double co2e;
    public String co2e_unit;
    public String co2e_calculation_method;
    public String co2e_calculation_origin;
    public EmissionFactor emission_factor;
    public ConstituentGases constituent_gases;
}

ConstituentGases.java

package models;

public class ConstituentGases {
    public double co2e_total;
    public Object co2e_other;
    public Object co2;
    public Object ch4;
    public Object n2o;
}

EmissionFactor.java

package models;

public class EmissionFactor {
    public String id;
    public String source;
    public String year;
    public String region;
    public String category;
    public String lca_activity;
}