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import java.util.Base64;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import org.apache.http.ssl.SSLContextBuilder;
import javax.net.ssl.*;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import org.apache.http.conn.ssl.*;

public class knoxDemoClientRest {
		
   public static void main(String[] args) throws Exception {
    JSONObject jsonObj = new JSONObject();

    CloseableHttpClient client = createAcceptSelfSignedCertificateClient();

    HttpGet http_get = new HttpGet("https://127.0.0.1:8443/gateway/default/hbase/NS:MARCOS/row1");
    String user = "guest";
    String pass = "guest-password";
    String auth = Base64.getEncoder().encodeToString(String.format("%s:%s", user, pass).getBytes());
    http_get.addHeader("Accept", "application/json");
    http_get.addHeader("Authorization", "Basic " + auth);

    CloseableHttpResponse response = client.execute(http_get);

    String body = EntityUtils.toString(response.getEntity(), "UTF-8");

    client.close();

    if (response.getStatusLine().getStatusCode() != 200) {
        System.out.println("Error: " + response.getStatusLine());
        System.exit(1);
    }

    try {
        jsonObj = new JSONObject(body);
    } catch (JSONException e) {
        System.out.println("Error: " + e.getMessage());
        System.exit(1);
    }
    
    for(int i = 0; i < jsonObj.getJSONArray("Row").getJSONObject(0).getJSONArray("Cell").length(); i++) {
        long timestamp = jsonObj.getJSONArray("Row").getJSONObject(0).getJSONArray("Cell").getJSONObject(i).getLong("timestamp");
        String family = new String(Base64.getDecoder().decode(jsonObj.getJSONArray("Row").getJSONObject(0).getJSONArray("Cell").getJSONObject(i).getString("column"))).split(":")[0];
        String qualifier = new String(Base64.getDecoder().decode(jsonObj.getJSONArray("Row").getJSONObject(0).getJSONArray("Cell").getJSONObject(i).getString("column"))).split(":")[1];
        String value = new String(Base64.getDecoder().decode(jsonObj.getJSONArray("Row").getJSONObject(0).getJSONArray("Cell").getJSONObject(i).getString("$")));

        if (i > 0){
            System.out.println("--------");
        }

        System.out.println("family = " + family);
        System.out.println("qualifier = " + qualifier);
        System.out.println("value = " + value);
        System.out.println("timestamp = " + timestamp);
    }
   }

   private static CloseableHttpClient createAcceptSelfSignedCertificateClient() throws KeyManagementException, NoSuchAlgorithmException, KeyStoreException {
        SSLContext sslContext = SSLContextBuilder.create().loadTrustMaterial(new TrustSelfSignedStrategy()).build();
        HostnameVerifier allowAllHosts = new NoopHostnameVerifier();
        SSLConnectionSocketFactory connectionFactory = new SSLConnectionSocketFactory(sslContext, allowAllHosts);
        return HttpClients.custom().setSSLSocketFactory(connectionFactory).build();
    }
}