Example usage for org.json JSONObject keys

Introduction

In this page you can find the example usage for org.json JSONObject keys.

Prototype

public Iterator keys() 

Source Link

Document

Get an enumeration of the keys of the JSONObject.

Usage

From source file:com.inductiveautomation.reporting.examples.datasource.common.RestJsonDataSource.java

/**
 * Looks through the {@link JSONArray}, evaluating each {@link JSONObject} to determine which has the largest
 * set of keys.  This process is useful because not all JSON objects in an array may have the same key set.  There
 * are some assumptions made that the largest keyset will contain all the keys available in those of lower sets.
 * This is far from true, but this assumption is allowed for the sake of simplicity for this example.
 * @param jsonArray a {@link JSONArray}//from ww w  . j  a va2  s .co m
 * @return a JSONObject containing the most keys found in the array.  May be empty.
 */
private JSONObject findReferenceObjectIndex(JSONArray jsonArray) throws JSONException {
    JSONObject reference = null;
    if (jsonArray != null && jsonArray.length() > 0) {
        reference = jsonArray.getJSONObject(0);

        for (int i = 0; i < jsonArray.length(); i++) {
            JSONObject jo = jsonArray.getJSONObject(i);
            if (Iterators.size(jo.keys()) > Iterators.size(reference.keys())) {
                reference = jo;
            }
        }
    }
    return reference == null ? new JSONObject() : reference;
}

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From source file:com.inductiveautomation.reporting.examples.datasource.common.RestJsonDataSource.java

/**
 * Creates and returns {@link Dataset} with String column types from a {@link JSONArray}.  Returns empty if no data
 * was found and an exception was not thrown.
 *///  www .  j a v a 2 s .c o  m
private Dataset createDatasetFromJSONArray(JSONArray jsonArray) throws JSONException {
    Dataset ds = null;

    if (jsonArray.length() >= 1) {
        // JSON objects in an array may not have values for each key, so make sure we
        // get the full keyset
        JSONObject reference = findReferenceObjectIndex(jsonArray);

        // get column names from the reference object
        List<String> colNames = new ArrayList<>();
        Iterator keys = reference.keys();
        while (keys.hasNext()) {
            colNames.add(keys.next().toString());
        }

        // now start building dataset to pass into report engine
        DatasetBuilder builder = new DatasetBuilder();
        builder.colNames(colNames.toArray(new String[colNames.size()]));

        // set the column types. We're using all strings in this example, but we could be
        // checking for numeric types and setting different column types to enable calculations
        Class[] types = new Class[colNames.size()];
        for (int i = 0; i < types.length; i++) {
            types[i] = String.class;
        }
        builder.colTypes(types);

        // now create rows for each json list value
        for (int row = 0; row < jsonArray.length(); row++) {
            String[] rowData = new String[colNames.size()];
            for (int col = 0; col < colNames.size(); col++) {
                try {
                    rowData[col] = jsonArray.getJSONObject(row).get(colNames.get(col)).toString();
                } catch (JSONException e) {
                    // ignore because it just means this object didn't have our key
                }
            }
            builder.addRow(rowData);
        }
        ds = builder.build();
    }
    return ds != null ? ds : new BasicDataset();
}

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From source file:org.loklak.server.Accounting.java

/**
 * cleanup deletes all old entries and frees up the memory.
 * some outside process muss call this frequently
 * @return self/*from  w  ww .  j av  a2  s  .  c o  m*/
 */
public Accounting cleanup() {
    if (!this.has("requests"))
        return this;
    JSONObject requests = this.getJSONObject("requests");
    for (String path : requests.keySet()) {
        JSONObject events = requests.getJSONObject(path);
        // shrink that map and delete everything which is older than now minus one hour
        long pivotTime = System.currentTimeMillis() - ONE_HOUR_MILLIS;
        while (events.length() > 0 && Long.parseLong(events.keys().next()) < pivotTime)
            events.remove(events.keys().next());
        if (events.length() == 0)
            requests.remove(path);
    }
    return this;
}

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From source file:de.grobox.blitzmail.MainActivity.java

private void sendNow() {
    JSONObject mails = MailStorage.getMails(this);

    Iterator<?> i = mails.keys();

    while (i.hasNext()) {
        String mail = mails.opt((String) i.next()).toString();

        Intent intent = new Intent(this, SendActivity.class);
        intent.setAction("BlitzMailReSend");
        intent.putExtra("mail", mail);
        startActivity(intent);/*from w  w  w.  j ava2 s  .c o  m*/
    }

    ((PreferenceCategory) findPreference("pref_sending")).removePreference(findPreference("pref_send_now"));
}

---

From source file:de.schildbach.wallet.ExchangeRatesProvider.java

private static Map<String, ExchangeRate> requestExchangeRates(final URL url, final String userAgent,
        final String source, final String... fields) {
    final long start = System.currentTimeMillis();

    HttpURLConnection connection = null;
    Reader reader = null;/*from   w  w w. j  a va  2  s .c o m*/

    try {
        connection = (HttpURLConnection) url.openConnection();

        connection.setInstanceFollowRedirects(false);
        connection.setConnectTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.setReadTimeout(Constants.HTTP_TIMEOUT_MS);
        connection.addRequestProperty("User-Agent", userAgent);
        connection.addRequestProperty("Accept-Encoding", "gzip");
        connection.connect();

        final int responseCode = connection.getResponseCode();
        if (responseCode == HttpURLConnection.HTTP_OK) {
            final String contentEncoding = connection.getContentEncoding();

            InputStream is = new BufferedInputStream(connection.getInputStream(), 1024);
            if ("gzip".equalsIgnoreCase(contentEncoding))
                is = new GZIPInputStream(is);

            reader = new InputStreamReader(is, Charsets.UTF_8);
            final StringBuilder content = new StringBuilder();
            final long length = Io.copy(reader, content);

            final Map<String, ExchangeRate> rates = new TreeMap<String, ExchangeRate>();

            final JSONObject head = new JSONObject(content.toString());
            for (final Iterator<String> i = head.keys(); i.hasNext();) {
                final String currencyCode = i.next();
                if (!"timestamp".equals(currencyCode)) {
                    final JSONObject o = head.getJSONObject(currencyCode);

                    for (final String field : fields) {
                        final String rateStr = o.optString(field, null);

                        if (rateStr != null) {
                            try {
                                final Fiat rate = Fiat.parseFiat(currencyCode, rateStr);

                                if (rate.signum() > 0) {
                                    rates.put(currencyCode, new ExchangeRate(
                                            new org.bitcoinj.utils.ExchangeRate(rate), source));
                                    break;
                                }
                            } catch (final NumberFormatException x) {
                                log.warn("problem fetching {} exchange rate from {} ({}): {}", currencyCode,
                                        url, contentEncoding, x.getMessage());
                            }
                        }
                    }
                }
            }

            log.info("fetched exchange rates from {} ({}), {} chars, took {} ms", url, contentEncoding, length,
                    System.currentTimeMillis() - start);

            return rates;
        } else {
            log.warn("http status {} when fetching exchange rates from {}", responseCode, url);
        }
    } catch (final Exception x) {
        log.warn("problem fetching exchange rates from " + url, x);
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (final IOException x) {
                // swallow
            }
        }

        if (connection != null)
            connection.disconnect();
    }

    return null;
}

---

From source file:org.cgiar.ilri.odk.pull.backend.services.FetchFormDataService.java

/**
 * This method is called whenever the service is called. Note that the service might have
 * already been running when it was called
 *
 * @param intent The intent used to call the service
 *///from   w  w  w .  j  av  a2  s  .com
@Override
protected void onHandleIntent(Intent intent) {
    formName = intent.getStringExtra(KEY_FORM_NAME);
    if (formName != null) {
        //fetch data on the form
        try {
            String jsonString = DataHandler.sendDataToServer(this, null,
                    DataHandler.URI_FETCH_FORM_DATA + URLEncoder.encode(formName, "UTF-8"));
            if (jsonString != null) {
                try {
                    JSONObject jsonObject = new JSONObject(jsonString);
                    JSONObject fileData = jsonObject.getJSONObject("files");
                    Iterator<String> keys = fileData.keys();
                    String fetchedFilesString = "";
                    while (keys.hasNext()) {
                        String currFileName = keys.next();
                        Log.d(TAG, "Processing " + currFileName);
                        JSONArray currFileData = fileData.getJSONArray(currFileName);
                        if (currFileName.equals(Form.DEFAULT_CSV_FILE_NAME)) {
                            Log.d(TAG, "Treating " + currFileName + " like a itemset file");
                            Log.d(TAG, currFileName + " data = " + currFileData.toString());
                            String csv = getCSVString(currFileData);
                            if (csv != null) {
                                saveCSVInFile(currFileName + Form.SUFFIX_CSV, csv);
                                fetchedFilesString = fetchedFilesString + "\n" + " - " + currFileName
                                        + Form.SUFFIX_CSV;
                            } else {
                                Log.w(TAG, Form.DEFAULT_CSV_FILE_NAME
                                        + " from the server is null. Unable to save this on the device");
                                Toast.makeText(FetchFormDataService.this,
                                        getResources().getText(R.string.unable_fetch_data_for) + " "
                                                + currFileName,
                                        Toast.LENGTH_LONG).show();

                            }
                        } else {
                            Log.d(TAG, "Treating " + currFileName + " like an external data file");
                            boolean dataDumped = saveDataInDb(currFileName, currFileData);
                            String csv = getCSVString(currFileData);
                            if (csv != null) {
                                if (dataDumped) {
                                    saveCSVInFile(currFileName + Form.SUFFIX_CSV + Form.SUFFIX_IMPORTED, csv);
                                    fetchedFilesString = fetchedFilesString + "\n" + " - " + currFileName
                                            + Form.SUFFIX_DB;
                                    fetchedFilesString = fetchedFilesString + "\n" + " - " + currFileName
                                            + Form.SUFFIX_CSV + Form.SUFFIX_IMPORTED;
                                } else {
                                    saveCSVInFile(currFileName + Form.SUFFIX_CSV, csv);
                                    fetchedFilesString = fetchedFilesString + "\n" + " - " + currFileName
                                            + Form.SUFFIX_CSV;
                                }
                            } else {
                                Log.w(TAG, currFileName
                                        + " from the server is null. Unable to save this on the device");
                                Toast.makeText(FetchFormDataService.this,
                                        getResources().getText(R.string.unable_fetch_data_for) + " "
                                                + currFileName,
                                        Toast.LENGTH_LONG).show();
                            }
                        }
                    }
                    DataHandler.updateFormLastUpdateTime(FetchFormDataService.this, formName);
                    if (fetchedFilesString.length() > 0) {//only show the notification if at least one file updated
                        updateNotification(formName, getString(R.string.fetched_data),
                                getString(R.string.the_following_files_were_added) + fetchedFilesString);
                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e(TAG,
                        "Data from server null. Something happened while trying to fetch csv for " + formName);
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    } else {
        Log.w(TAG, "Form name from intent bundle was null, doing nothing");
    }
}

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From source file:com.trk.aboutme.facebook.model.JsonUtil.java

static void jsonObjectClear(JSONObject jsonObject) {
    @SuppressWarnings("unchecked")
    Iterator<String> keys = (Iterator<String>) jsonObject.keys();
    while (keys.hasNext()) {
        keys.next();/*from w ww . jav  a 2 s. c  o m*/
        keys.remove();
    }
}

---

From source file:com.trk.aboutme.facebook.model.JsonUtil.java

static boolean jsonObjectContainsValue(JSONObject jsonObject, Object value) {
    @SuppressWarnings("unchecked")
    Iterator<String> keys = (Iterator<String>) jsonObject.keys();
    while (keys.hasNext()) {
        Object thisValue = jsonObject.opt(keys.next());
        if (thisValue != null && thisValue.equals(value)) {
            return true;
        }//from w ww .ja  va 2  s  . co  m
    }
    return false;
}

---

From source file:com.trk.aboutme.facebook.model.JsonUtil.java

static Set<Map.Entry<String, Object>> jsonObjectEntrySet(JSONObject jsonObject) {
    HashSet<Map.Entry<String, Object>> result = new HashSet<Map.Entry<String, Object>>();

    @SuppressWarnings("unchecked")
    Iterator<String> keys = (Iterator<String>) jsonObject.keys();
    while (keys.hasNext()) {
        String key = keys.next();
        Object value = jsonObject.opt(key);
        result.add(new JSONObjectEntry(key, value));
    }//from w w w. j av  a 2s.c o m

    return result;
}

---

From source file:com.trk.aboutme.facebook.model.JsonUtil.java

static Set<String> jsonObjectKeySet(JSONObject jsonObject) {
    HashSet<String> result = new HashSet<String>();

    @SuppressWarnings("unchecked")
    Iterator<String> keys = (Iterator<String>) jsonObject.keys();
    while (keys.hasNext()) {
        result.add(keys.next());/*from w  w w  .  ja va  2 s  .c  o m*/
    }

    return result;
}

---

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