Example usage for com.google.gson JsonElement isJsonNull

Introduction

In this page you can find the example usage for com.google.gson JsonElement isJsonNull.

Prototype

public boolean isJsonNull() 

Source Link

Document

provides check for verifying if this element represents a null value or not.

Usage

From source file:angularBeans.remote.InvocationHandler.java

License:LGPL

private void update(Object o, JsonObject params) {

    if (params != null) {

        // boolean firstIn = false;

        for (Map.Entry<String, JsonElement> entry : params.entrySet()) {

            JsonElement value = entry.getValue();
            String name = entry.getKey();

            if ((name.equals("sessionUID")) || (name.equals("args"))) {
                continue;
            }/*from w ww  .ja v a  2  s  . co m*/

            if ((value.isJsonObject()) && (!value.isJsonNull())) {

                String getName;
                try {
                    getName = CommonUtils.obtainGetter(o.getClass().getDeclaredField(name));

                    Method getter = o.getClass().getMethod(getName);

                    Object subObj = getter.invoke(o);

                    // logger.log(Level.INFO, "#entring sub object "+name);
                    update(subObj, value.getAsJsonObject());

                } catch (NoSuchFieldException | SecurityException | IllegalAccessException
                        | IllegalArgumentException | InvocationTargetException | NoSuchMethodException e) {

                    e.printStackTrace();
                }

            }
            // ------------------------------------
            if (value.isJsonArray()) {

                try {
                    String getter = CommonUtils.obtainGetter(o.getClass().getDeclaredField(name));

                    Method get = o.getClass().getDeclaredMethod(getter);

                    Type type = get.getGenericReturnType();
                    ParameterizedType pt = (ParameterizedType) type;
                    Type actType = pt.getActualTypeArguments()[0];

                    String className = actType.toString();

                    className = className.substring(className.indexOf("class") + 6);
                    Class clazz = Class.forName(className);

                    JsonArray array = value.getAsJsonArray();

                    Collection collection = (Collection) get.invoke(o);
                    Object elem;
                    for (JsonElement element : array) {
                        if (element.isJsonPrimitive()) {
                            JsonPrimitive primitive = element.getAsJsonPrimitive();

                            elem = element;
                            if (primitive.isBoolean())
                                elem = primitive.getAsBoolean();
                            if (primitive.isString()) {
                                elem = primitive.getAsString();
                            }
                            if (primitive.isNumber())
                                elem = primitive.isNumber();

                        } else {

                            elem = util.deserialise(clazz, element);
                        }

                        try {

                            if (collection instanceof List) {

                                if (collection.contains(elem))
                                    collection.remove(elem);
                            }

                            collection.add(elem);
                        } catch (UnsupportedOperationException e) {
                            Logger.getLogger("AngularBeans").log(java.util.logging.Level.WARNING,
                                    "trying to modify an immutable collection : " + name);
                        }

                    }

                } catch (Exception e) {
                    e.printStackTrace();

                }

            }

            // ------------------------------------------
            if (value.isJsonPrimitive() && (!name.equals("setSessionUID"))) {
                try {

                    if (!CommonUtils.hasSetter(o.getClass(), name)) {
                        continue;
                    }
                    name = "set" + name.substring(0, 1).toUpperCase() + name.substring(1);

                    Class type = null;
                    for (Method set : o.getClass().getDeclaredMethods()) {
                        if (CommonUtils.isSetter(set)) {
                            if (set.getName().equals(name)) {
                                Class<?>[] pType = set.getParameterTypes();

                                type = pType[0];
                                break;

                            }
                        }

                    }

                    if (type.equals(LobWrapper.class))
                        continue;

                    Object param = null;
                    if ((params.entrySet().size() >= 1) && (type != null)) {

                        param = CommonUtils.convertFromString(value.getAsString(), type);

                    }

                    o.getClass().getMethod(name, type).invoke(o, param);

                } catch (Exception e) {
                    e.printStackTrace();

                }
            }

        }
    }

}

---

From source file:at.orz.arangodb.util.JsonUtils.java

License:Apache License

public static double toDouble(JsonElement elem) {
    if (elem != null && !elem.isJsonNull()) {
        JsonPrimitive primitive = elem.getAsJsonPrimitive();
        if (primitive.isNumber()) {
            return primitive.getAsDouble();
        } else if (primitive.isString()) {
            if ("INF".equals(primitive.getAsString())) {
                return Double.POSITIVE_INFINITY;
            } else if ("NaN".equals(primitive.getAsString())) {
                return Double.NaN;
            }//from   www  . j  av a 2  s.  co m
        }
    }
    return Double.NaN;
}

---

From source file:au.edu.ausstage.tweetgatherer.MessageProcessor.java

License:Open Source License

/**
 * A private method to sanitise the message
 *
 * @param jsonTweetObject the original message object
 * @param idHash          the hash of the message id
 *
 * @return                the sanitised message object
 *//*from   w  ww .j  av  a2 s  .c  o m*/
private JsonObject sanitiseMessage(JsonObject jsonTweetObject, String idHash) {

    // remove the id and replace it with the hash
    jsonTweetObject.remove("id");
    jsonTweetObject.addProperty("id", idHash);

    // replace the "in_reply_to_user_id" field with a hash if present
    if (jsonTweetObject.has("in_reply_to_user_id") == true) {

        // get a hash of the value
        JsonElement elem = jsonTweetObject.get("in_reply_to_user_id");
        if (elem.isJsonNull() == false) {
            String hash = HashUtils.hashValue(elem.getAsString());

            // update the value
            jsonTweetObject.remove("in_reply_to_user_id");
            jsonTweetObject.addProperty("in_reply_to_user_id", hash);
        }
    }

    // replace the "in_reply_to_status_id" field with a hash if present
    if (jsonTweetObject.has("in_reply_to_status_id") == true) {

        // get a hash of the value
        JsonElement elem = jsonTweetObject.get("in_reply_to_status_id");
        if (elem.isJsonNull() == false) {
            String hash = HashUtils.hashValue(elem.getAsString());

            // update the value
            jsonTweetObject.remove("in_reply_to_status_id");
            jsonTweetObject.addProperty("in_reply_to_status_id", hash);
        }
    }

    // replace the "retweeted_status" field with a hash if present
    if (jsonTweetObject.has("retweeted_status") == true) {

        // get a hash of the value
        JsonElement elem = jsonTweetObject.get("retweeted_status");
        if (elem.isJsonNull() == false) {
            String hash = HashUtils.hashValue(elem.getAsString());

            // update the value
            jsonTweetObject.remove("retweeted_status");
            jsonTweetObject.addProperty("retweeted_status", hash);
        }
    }

    // return the sanitised object
    return jsonTweetObject;

}

---

From source file:augsburg.se.alltagsguide.common.EventCategory.java

License:Open Source License

@Nullable
public static EventCategory fromJson(@NonNull final JsonObject jsonCategory) {
    if (jsonCategory.isJsonNull()) {
        return null;
    }//  w ww  .j  a  v  a2 s .  c  o  m
    JsonElement idElement = jsonCategory.get("id");
    if (idElement.isJsonNull()) {
        return null;
    }
    int id = Helper.getIntOrDefault(idElement, -1);
    if (id == -1) {
        return null;
    }
    String name = jsonCategory.get("name").getAsString();
    int parent = jsonCategory.get("parent").getAsInt();
    return new EventCategory(id, name, parent);
}

---

From source file:augsburg.se.alltagsguide.common.EventLocation.java

License:Open Source License

@Nullable
public static EventLocation fromJson(@NonNull JsonObject jsonPage) {
    if (jsonPage.isJsonNull()) {
        return null;
    }//from www . j  a  v a 2s.  c  o m
    JsonElement idElement = jsonPage.get("id");
    if (idElement.isJsonNull()) {
        return null;
    }
    int id = Helper.getIntOrDefault(idElement, -1);
    if (id == -1) {
        return null;
    }
    return new EventLocation(id, Helper.getStringOrDefault(jsonPage.get("name"), null),
            Helper.getStringOrDefault(jsonPage.get("address"), null),
            Helper.getStringOrDefault(jsonPage.get("town"), null),
            Helper.getStringOrDefault(jsonPage.get("state"), null),
            Helper.getIntOrDefault(jsonPage.get("postcode"), 0),
            Helper.getStringOrDefault(jsonPage.get("region"), null),
            Helper.getStringOrDefault(jsonPage.get("country"), null),
            Helper.getFloatOrDefault(jsonPage.get("latitude"), 0.0f),
            Helper.getFloatOrDefault(jsonPage.get("longitude"), 0.0f));
}

---

From source file:augsburg.se.alltagsguide.common.EventPage.java

License:Open Source License

@NonNull
public static EventPage fromJson(@NonNull final JsonObject jsonPage) {
    Page page = Page.fromJson(jsonPage);
    //TODO jsonPage.get("page") !?
    Event event = Event.fromJson(jsonPage.get("event").getAsJsonObject(), page.getId());
    JsonElement locationElement = jsonPage.get("location");
    EventLocation location = null;//ww  w .  j  ava 2  s.  c om
    if (locationElement != null && !locationElement.isJsonNull()) {
        location = EventLocation.fromJson(locationElement.getAsJsonObject());
    }
    List<EventTag> tags = EventTag.fromJson(jsonPage.get("tags").getAsJsonArray());
    List<EventCategory> categories = EventCategory.fromJson(jsonPage.get("categories").getAsJsonArray());
    return new EventPage(page, event, location, tags, categories);
}

---

From source file:augsburg.se.alltagsguide.common.Location.java

License:Open Source License

@NonNull
public static Location fromJson(JsonObject jsonPage) {
    int id = jsonPage.get("id").getAsInt();
    String name = jsonPage.get("name").getAsString();
    String icon = jsonPage.get("icon").isJsonNull() ? null : jsonPage.get("icon").getAsString();
    String path = jsonPage.get("path").getAsString();
    String description = jsonPage.get("description").getAsString();
    boolean global = false;
    if (jsonPage.has("global")) {
        global = !jsonPage.get("global").isJsonNull() && jsonPage.get("global").getAsBoolean();
    }/*ww w. j a v a 2s .c  o m*/
    int color = jsonPage.get("color").isJsonNull() ? Color.parseColor("#00BCD4")
            : Color.parseColor(jsonPage.get("color").getAsString());
    String cityImage = jsonPage.get("cover_image").isJsonNull() ? ""
            : jsonPage.get("cover_image").getAsString();
    if (cityImage == null || "".equals(cityImage)) {
        cityImage = "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a6/Brandenburger_Tor_abends.jpg/300px-Brandenburger_Tor_abends.jpg";
    }
    float latitude = 0.0f; //TODO
    float longitude = 0.0f; //TODO
    boolean debug = false;
    if (jsonPage.has("live")) {
        JsonElement elem = jsonPage.get("live");
        if (elem != null && !elem.isJsonNull()) {
            debug = elem.getAsBoolean();
        }
    }
    return new Location(id, name, icon, path, description, global, color, cityImage, latitude, longitude,
            debug);
}

---

From source file:augsburg.se.alltagsguide.common.Page.java

License:Open Source License

@NonNull
public static Page fromJson(@NonNull final JsonObject jsonPage) {
    int id = jsonPage.get("id").getAsInt();
    String title = jsonPage.get("title").getAsString();
    String type = jsonPage.get("type").getAsString();
    String status = jsonPage.get("status").getAsString();
    long modified;
    try {//from   w  w w.  j a va2s .  c om
        modified = Helper.FROM_DATE_FORMAT.parse(jsonPage.get("modified_gmt").getAsString()).getTime();
    } catch (ParseException e) {
        Ln.e(e);
        modified = -1;
    }
    String description = jsonPage.get("excerpt").getAsString();
    String content = jsonPage.get("content").getAsString();
    int parentId = jsonPage.get("parent").getAsInt();
    int order = jsonPage.get("order").getAsInt();
    String thumbnail = jsonPage.get("thumbnail").isJsonNull() ? "" : jsonPage.get("thumbnail").getAsString();
    Author author = Author.fromJson(jsonPage.get("author").getAsJsonObject());
    List<AvailableLanguage> languages = AvailableLanguage.fromJson(jsonPage.get("available_languages"));

    boolean autoTranslated = false;
    if (jsonPage.has("automatic_translation")) {
        JsonElement elem = jsonPage.get("automatic_translation");
        if (elem != null && !elem.isJsonNull()) {
            autoTranslated = elem.getAsBoolean();
        }
    }
    return new Page(id, title, type, status, modified, description, content, parentId, order, thumbnail, author,
            autoTranslated, languages);
}

---

From source file:bind.JsonTreeReader.java

License:Apache License

@Override
public JsonToken peek() throws IOException {
    if (stack.isEmpty()) {
        return JsonToken.END_DOCUMENT;
    }/*from   w w  w . j a  v a2 s  .com*/

    Object o = peekStack();
    if (o instanceof Iterator) {
        Object secondToTop = stack.get(stack.size() - 2);
        boolean isObject = secondToTop instanceof JsonElement && ((JsonElement) secondToTop).isJsonObject();
        Iterator<?> iterator = (Iterator<?>) o;
        if (iterator.hasNext()) {
            if (isObject) {
                return JsonToken.NAME;
            } else {
                stack.add(iterator.next());
                return peek();
            }
        } else {
            return isObject ? JsonToken.END_OBJECT : JsonToken.END_ARRAY;
        }
    } else if (o instanceof JsonElement) {
        JsonElement el = (JsonElement) o;
        if (el.isJsonObject()) {
            return JsonToken.BEGIN_OBJECT;
        } else if (el.isJsonArray()) {
            return JsonToken.BEGIN_ARRAY;
        } else if (el.isJsonPrimitive()) {
            JsonPrimitive primitive = (JsonPrimitive) o;
            if (primitive.isString()) {
                return JsonToken.STRING;
            } else if (primitive.isBoolean()) {
                return JsonToken.BOOLEAN;
            } else if (primitive.isNumber()) {
                return JsonToken.NUMBER;
            } else {
                throw new AssertionError();
            }
        } else if (el.isJsonNull()) {
            return JsonToken.NULL;
        }
        throw new AssertionError();
    } else if (o == SENTINEL_CLOSED) {
        throw new IllegalStateException("JsonReader is closed");
    } else {
        throw new AssertionError();
    }
}

---

From source file:bind.JsonTreeWriter.java

License:Apache License

private void put(JsonElement value) {
    if (pendingName != null) {
        if (!value.isJsonNull() || getSerializeNulls()) {
            JsonObject object = (JsonObject) peek();
            object.add(pendingName, value);
        }/* ww w .j a v  a  2  s . c om*/
        pendingName = null;
    } else if (stack.isEmpty()) {
        product = value;
    } else {
        JsonElement element = peek();
        if (element.isJsonArray()) {
            element.getAsJsonArray().add(value);
        } else {
            throw new IllegalStateException();
        }
    }
}

---

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