The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 package org.mozilla.gecko.background.healthreport;

 import java.util.HashSet;

 import java.util.Iterator;

 import java.util.Set;

 import java.util.SortedSet;

 import java.util.TreeSet;

 import java.util.UUID;

 import org.json.JSONArray;

 import org.json.JSONException;

 import org.json.JSONObject;

 import org.mozilla.apache.commons.codec.digest.DigestUtils;

 import android.content.ContentUris;

 import android.net.Uri;

 public class HealthReportUtils {

   public static final String LOG_TAG = HealthReportUtils.class.getSimpleName();

   public static String getEnvironmentHash(final String input) {

     return DigestUtils.shaHex(input);

   }

   /**

    * Take an environment URI (one that identifies an environment) and produce an

    * event URI.

    *

    * That this is needed is tragic.

    *

    * @param environmentURI

    *          the {@link Uri} returned by an environment operation.

    * @return a {@link Uri} to which insertions can be dispatched.

    */

   public static Uri getEventURI(Uri environmentURI) {

     return environmentURI.buildUpon().path("/events/" + ContentUris.parseId(environmentURI) + "/").build();

   }

   /**

    * Copy the keys from the provided {@link JSONObject} into the provided {@link Set}.

    */

   private static <T extends Set<String>> T intoKeySet(T keys, JSONObject o) {

     if (o == null || o == JSONObject.NULL) {

       return keys;

     }

     @SuppressWarnings("unchecked")

     Iterator<String> it = o.keys();

     while (it.hasNext()) {

       keys.add(it.next());

     }

     return keys;

   }

   /**

    * Produce a {@link SortedSet} containing the string keys of the provided

    * object.

    *

    * @param o a {@link JSONObject} with string keys.

    * @return a sorted set.

    */

   public static SortedSet<String> sortedKeySet(JSONObject o) {

     return intoKeySet(new TreeSet<String>(), o);

   }

   /**

    * Produce a {@link Set} containing the string keys of the provided object.

    * @param o a {@link JSONObject} with string keys.

    * @return an unsorted set.

    */

   public static Set<String> keySet(JSONObject o) {

     return intoKeySet(new HashSet<String>(), o);

   }

   /**

    * Just like {@link JSONObject#accumulate(String, Object)}, but doesn't do the wrong thing for single values.

    * @throws JSONException 

    */

   public static void append(JSONObject o, String key, Object value) throws JSONException {

     if (!o.has(key)) {

       JSONArray arr = new JSONArray();

       arr.put(value);

       o.put(key, arr);

       return;

     }

     Object dest = o.get(key);

     if (dest instanceof JSONArray) {

       ((JSONArray) dest).put(value);

       return;

     }

     JSONArray arr = new JSONArray();

     arr.put(dest);

     arr.put(value);

     o.put(key, arr);

   }

   /**

    * Accumulate counts for how often each provided value occurs.

    *

    * <code>

    *   HealthReportUtils.count(o, "foo", "bar");

    * </code>

    *

    * will change

    *

    * <pre>

    *   {"foo", {"bar": 1}}

    * </pre>

    *

    * into

    *

    * <pre>

    *   {"foo", {"bar": 2}}

    * </pre>

    *

    */

   public static void count(JSONObject o, String key,

                            String value) throws JSONException {

     if (!o.has(key)) {

       JSONObject counts = new JSONObject();

       counts.put(value, 1);

       o.put(key, counts);

       return;

     }

     JSONObject dest = o.getJSONObject(key);

     dest.put(value, dest.optInt(value, 0) + 1);

   }

   public static String generateDocumentId() {

     return UUID.randomUUID().toString();

   }

 }