Example usage for com.google.gson JsonElement isJsonNull

List of usage examples for com.google.gson JsonElement isJsonNull

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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:com.skysql.manager.api.SystemInfo.java

License:Open Source License

public SystemInfo deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException, NullPointerException {
    SystemInfo systemInfo = new SystemInfo();

    JsonArray array = null;/* ww  w .  j  a v a  2s  . com*/

    int length = 0;
    if (json.getAsJsonObject().has("systems")) {
        array = json.getAsJsonObject().get("systems").getAsJsonArray();
        length = array.size();
    } else if (json.getAsJsonObject().has("system")) {
        length = 1;
    }

    LinkedHashMap<String, SystemRecord> systemsMap = new LinkedHashMap<String, SystemRecord>(length);
    systemInfo.setSystemsMap(systemsMap);
    if (length == 0) {
        return systemInfo;
    }

    for (int i = 0; i < length; i++) {

        SystemRecord systemRecord = new SystemRecord(SystemInfo.SYSTEM_ROOT);

        JsonObject systemObject = (array != null) ? array.get(i).getAsJsonObject()
                : json.getAsJsonObject().get("system").getAsJsonObject();
        JsonElement element;
        systemRecord
                .setID((element = systemObject.get("systemid")).isJsonNull() ? null : element.getAsString());
        systemRecord.setSystemType(
                (element = systemObject.get("systemtype")).isJsonNull() ? null : element.getAsString());
        systemRecord.setName((element = systemObject.get("name")).isJsonNull() ? null : element.getAsString());
        systemRecord
                .setState((element = systemObject.get("state")).isJsonNull() ? null : element.getAsString());
        systemRecord.setStartDate(
                (element = systemObject.get("started")).isJsonNull() ? null : element.getAsString());
        systemRecord.setLastAccess(
                (element = systemObject.get("lastaccess")).isJsonNull() ? null : element.getAsString());
        systemRecord.setLastBackup(
                (element = systemObject.get("lastbackup")).isJsonNull() ? null : element.getAsString());
        systemRecord.setDBUsername(
                (element = systemObject.get("dbusername")).isJsonNull() ? null : element.getAsString());
        systemRecord.setDBPassword(
                (element = systemObject.get("dbpassword")).isJsonNull() ? null : element.getAsString());
        systemRecord.setRepUsername(
                (element = systemObject.get("repusername")).isJsonNull() ? null : element.getAsString());
        systemRecord.setRepPassword(
                (element = systemObject.get("reppassword")).isJsonNull() ? null : element.getAsString());
        systemRecord.setLastMonitored(
                ((element = systemObject.get("lastmonitored")).isJsonNull()) ? null : element.getAsString());

        MonitorLatest monitorLatest = null;
        if ((element = systemObject.get("monitorlatest")) != null && !element.isJsonNull()) {
            monitorLatest = APIrestful.getGson().fromJson(element.toString(), MonitorLatest.class);
        }
        systemRecord.setMonitorLatest(monitorLatest);

        String[] nodes = null;
        if ((element = systemObject.get("nodes")) != null && !element.isJsonNull()) {
            JsonArray nodesJson = element.getAsJsonArray();
            int nodesCount = nodesJson.size();

            nodes = new String[nodesCount];
            for (int nodesIndex = 0; nodesIndex < nodesCount; nodesIndex++) {
                nodes[nodesIndex] = nodesJson.get(nodesIndex).getAsString();
            }
        }
        systemRecord.setNodes(nodes);

        LinkedHashMap<String, String> properties = new LinkedHashMap<String, String>();
        if ((element = systemObject.get("properties")) != null && !element.isJsonNull()) {

            JsonObject propertiesJson = element.getAsJsonObject();

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_EIP)) != null) {
                properties.put(SystemInfo.PROPERTY_EIP, element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_MONYOG)) != null) {
                properties.put(SystemInfo.PROPERTY_MONYOG, element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_PHPMYADMIN)) != null) {
                properties.put(SystemInfo.PROPERTY_PHPMYADMIN,
                        element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_DEFAULTMONITORINTERVAL)) != null) {
                properties.put(SystemInfo.PROPERTY_DEFAULTMONITORINTERVAL,
                        element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_DEFAULTMAXBACKUPCOUNT)) != null) {
                properties.put(SystemInfo.PROPERTY_DEFAULTMAXBACKUPCOUNT,
                        element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_DEFAULTMAXBACKUPSIZE)) != null) {
                properties.put(SystemInfo.PROPERTY_DEFAULTMAXBACKUPSIZE,
                        element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_VERSION)) != null) {
                properties.put(SystemInfo.PROPERTY_VERSION,
                        element.isJsonNull() ? null : element.getAsString());
            }

            if ((element = propertiesJson.get(SystemInfo.PROPERTY_SKIPLOGIN)) != null) {
                properties.put(SystemInfo.PROPERTY_SKIPLOGIN,
                        element.isJsonNull() ? null : element.getAsString());
            }

        }
        systemRecord.setProperties(properties);

        systemsMap.put(systemRecord.getID(), systemRecord);
    }

    if (array != null) {
        // create a "ROOT" system record to contain the series of flat systems; in a hierarchical organization of systems, this might be provided by the API
        SystemRecord rootRecord = new SystemRecord(null);
        rootRecord.setID(SystemInfo.SYSTEM_ROOT);
        rootRecord.setName("Root");
        String[] systems = new String[systemsMap.keySet().size()];
        int i = 0;
        for (String systemID : systemsMap.keySet()) {
            systems[i++] = systemID;
        }
        rootRecord.setNodes(systems);
        systemsMap.put(SystemInfo.SYSTEM_ROOT, rootRecord);
    }

    return systemInfo;
}

From source file:com.skysql.manager.api.SystemTypes.java

License:Open Source License

public SystemTypes deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException, NullPointerException {

    SystemTypes systemTypes = new SystemTypes();

    JsonElement jsonElement = json.getAsJsonObject().get("systemtypes");
    if (jsonElement == null || jsonElement.isJsonNull()) {
        systemTypes.setList(null);//from   w  ww . j  a  v a2  s  .  co m
    } else {
        LinkedHashMap<String, String> types = new LinkedHashMap<String, String>();
        Set<Entry<String, JsonElement>> set = jsonElement.getAsJsonObject().entrySet();
        Iterator<Entry<String, JsonElement>> iter = set.iterator();
        while (iter.hasNext()) {
            Entry<String, JsonElement> entry = iter.next();
            String type = entry.getKey();
            String description = entry.getValue().getAsString();
            types.put(type, description);
        }
        systemTypes.setList(types);
    }
    return systemTypes;

}

From source file:com.skysql.manager.api.UserInfo.java

License:Open Source License

public UserInfo deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException, NullPointerException {
    UserInfo userInfo = new UserInfo();

    JsonElement jsonElement = json.getAsJsonObject().get("users");
    if (jsonElement.isJsonNull()) {
        userInfo.setUsersList(new LinkedHashMap<String, UserObject>());
    } else {/*from  w  w  w. j a  v  a  2s.  c  o  m*/
        JsonArray array = jsonElement.getAsJsonArray();
        int length = array.size();

        LinkedHashMap<String, UserObject> usersList = new LinkedHashMap<String, UserObject>(length);
        for (int i = 0; i < length; i++) {
            JsonObject backupJson = array.get(i).getAsJsonObject();
            JsonElement element;
            String username = (element = backupJson.get("username")).isJsonNull() ? null
                    : element.getAsString();
            String name = (element = backupJson.get("name")).isJsonNull() ? null : element.getAsString();
            UserObject userObject = new UserObject(username, name);
            usersList.put(username, userObject);
        }
        userInfo.setUsersList(usersList);
    }

    return userInfo;
}

From source file:com.skysql.manager.api.UserObject.java

License:Open Source License

public UserObject deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException, NullPointerException {
    UserObject userObject = new UserObject();

    JsonObject jsonObject = json.getAsJsonObject();
    JsonElement element;

    if (jsonObject.has("user")) {
        jsonObject = jsonObject.get("user").getAsJsonObject();
        userObject.setUserID(((element = jsonObject.get("username")) == null || element.isJsonNull()) ? null
                : element.getAsString());
        userObject.setName(((element = jsonObject.get("name")) == null || element.isJsonNull()) ? null
                : element.getAsString());

        JsonElement jsonElement = jsonObject.get("properties");
        if (jsonElement == null || jsonElement.isJsonNull()) {
            userObject.setProperties(null);
        } else {/*from  w w w. j av  a 2  s  . com*/
            jsonObject = (JsonObject) jsonElement;
            LinkedHashMap<String, String> properties = new LinkedHashMap<String, String>();
            Set<Entry<String, JsonElement>> set = jsonObject.entrySet();
            Iterator<Entry<String, JsonElement>> iter = set.iterator();
            while (iter.hasNext()) {
                Entry<String, JsonElement> entry = iter.next();
                String property = entry.getKey();
                String value = entry.getValue().getAsString();
                properties.put(property, value);
            }
            userObject.setProperties(properties);
        }

    } else if (jsonObject.has("errors")) {

    } else {

    }

    return userObject;
}

From source file:com.skysql.manager.api.Versions.java

License:Open Source License

public Versions deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException, NullPointerException {

    JsonElement jsonElement = json.getAsJsonObject().get("components");
    if (jsonElement != null && !jsonElement.isJsonNull()) {

        LinkedHashMap<String, Versions> versionsList = new LinkedHashMap<String, Versions>();
        Set<Entry<String, JsonElement>> set = jsonElement.getAsJsonObject().entrySet();
        Iterator<Entry<String, JsonElement>> iter = set.iterator();
        while (iter.hasNext()) {
            Entry<String, JsonElement> entry = iter.next();
            String componentID = entry.getKey();
            JsonObject jsonObject = entry.getValue().getAsJsonObject();
            JsonElement element;// w  w  w.  ja v a2s .  c  om
            String name = (element = jsonObject.get("name")) == null || element.isJsonNull()
                    ? Versions.NOT_AVAILABLE
                    : element.getAsString();
            String version = (element = jsonObject.get("version")) == null || element.isJsonNull()
                    ? Versions.NOT_AVAILABLE
                    : element.getAsString();
            String release = (element = jsonObject.get("release")) == null || element.isJsonNull()
                    ? Versions.NOT_AVAILABLE
                    : element.getAsString();
            String date = (element = jsonObject.get("date")) == null || element.isJsonNull() ? null
                    : element.getAsString();
            versionsList.put(componentID, new Versions(name, version, release, date));
        }
        Versions.setVersionsList(versionsList);
    }

    return null;
}

From source file:com.skysql.manager.api.WriteResponse.java

License:Open Source License

public WriteResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
        throws JsonParseException {

    WriteResponse writeResponse = new WriteResponse();

    JsonElement jsonElement = json.getAsJsonObject().get("deletecount");
    if (jsonElement != null && !jsonElement.isJsonNull()) {
        writeResponse.setDeleteCount(jsonElement.getAsInt());
    }/*from   w  w w .  j a  v a  2s .c  o  m*/

    jsonElement = json.getAsJsonObject().get("updatecount");
    if (jsonElement != null && !jsonElement.isJsonNull()) {
        writeResponse.setUpdateCount(jsonElement.getAsInt());
    }

    jsonElement = json.getAsJsonObject().get("insertkey");
    if (jsonElement != null && !jsonElement.isJsonNull()) {
        writeResponse.setInsertKey(jsonElement.getAsString());
    }

    return writeResponse;
}

From source file:com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.java

License:Open Source License

private @CheckForNull Object jsonToJavaObject(JsonElement jsonValue, Class<?> parameterType, Type gsonType) {
    Object value;//from ww  w.ja v  a  2  s  .c  om
    if (jsonValue.isJsonNull()) {
        return null;
    }

    // Handle string in a special way, due to possibility of having a Java char type in the Java
    // side
    if (isString(jsonValue)) {
        if (parameterType.equals(String.class)) {
            value = jsonValue.getAsString();
            return value;
        }
        if (parameterType.equals(char.class) || parameterType.equals(Character.class)) {
            value = Character.valueOf(jsonValue.getAsString().charAt(0));
            return value;
        }
    }

    // If Java parameter is Object, we perform 'magic': json string, number, boolean and
    // null are converted to Java String, Double, Boolean and null. For json objects,
    // we create a Map<String,Object>, and for json arrays an Object[], and then perform
    // internal object conversion recursively using the same technique
    if (parameterType.equals(Object.class) && SUPPORTS_OBJECT_TYPE_PARAMETER) {
        value = toSimpleJavaType(jsonValue);
        return value;
    }

    // If the Java parameter is an array, but we are receiving a single item, we try to convert
    // the item to a single item array so that the Java method can digest it
    boolean useCustomGsonType = gsonType != null;
    boolean fakeJsonArrayForManyValuedClasses = JsonDeserializationManager.isManyValuedClass(parameterType)
            && !jsonValue.isJsonArray();

    Type typeToInstantiate = parameterType;
    if (useCustomGsonType) {
        typeToInstantiate = gsonType;
    }

    JsonElement json = jsonValue;
    if (fakeJsonArrayForManyValuedClasses) {
        JsonArray fakeJson = new JsonArray();
        fakeJson.add(jsonValue);
        json = fakeJson;
    }
    value = getGson().fromJson(json, typeToInstantiate);
    return value;
}

From source file:com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.java

License:Open Source License

private @CheckForNull Object toSimpleJavaType(JsonElement jsonValue) {
    if (jsonValue == null)
        return null; //VR
    Object value = null;/*w ww .j  av  a 2 s  .  co  m*/
    if (!jsonValue.isJsonNull()) {
        if (jsonValue.isJsonPrimitive()) {
            JsonPrimitive primitive = jsonValue.getAsJsonPrimitive();
            if (primitive.isBoolean()) {
                value = Boolean.valueOf(primitive.getAsBoolean());
            } else if (primitive.isNumber()) {
                value = Double.valueOf(primitive.getAsDouble());
            } else if (primitive.isString()) {
                value = primitive.getAsString();
            } else {
                throw UnexpectedException.forUnexpectedCodeBranchExecuted();
            }
        } else if (jsonValue.isJsonArray()) {
            //This simply does not work (?) 
            JsonArray array = jsonValue.getAsJsonArray();
            Object[] result = new Object[array.size()];
            for (int i = 0; i < array.size(); i++) {
                result[i] = toSimpleJavaType(array.get(i));
            }
            value = result;
        } else if (jsonValue.isJsonObject()) {
            //This simply does not work (?)
            //value = getGson().fromJson(jsonValue, Map.class );

            JsonObject obj = jsonValue.getAsJsonObject();
            Iterator<Entry<String, JsonElement>> properties = obj.entrySet().iterator();
            Map<String, Object> result = new HashMap<String, Object>();
            while (properties.hasNext()) {
                Entry<String, JsonElement> property = properties.next();
                JsonElement propertyValue = property.getValue();
                result.put(property.getKey(), toSimpleJavaType(propertyValue));
            }
            value = result;
        } else {
            throw UnexpectedException.forUnexpectedCodeBranchExecuted();
        }
    }

    return value;
}

From source file:com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.java

License:Open Source License

private static boolean isValidJsonTypeForJavaType(JsonElement jsonElement, Class<?> parameterType) {
    assert jsonElement != null;
    assert parameterType != null;

    // Check json nulls
    if (jsonElement.isJsonNull()) {
        return !parameterType.isPrimitive();
    }//www.  j ava 2 s.  c  om

    if (parameterType.isArray()) {
        // This is *always* ok because if the value is not a json array
        // we will instantiate a single item array and attempt conversion
        return true;
    }

    if (parameterType.equals(Boolean.class) || parameterType.equals(boolean.class)) {
        return jsonElement.isJsonPrimitive() && ((JsonPrimitive) jsonElement).isBoolean();
    } else if (parameterType.equals(char.class) || parameterType.equals(Character.class)) {
        if (jsonElement.isJsonPrimitive() && ((JsonPrimitive) jsonElement).isString()) {
            return jsonElement.getAsString().length() == 1;
        }
        return false;
    } else if (parameterType.equals(String.class)) {
        return jsonElement.isJsonPrimitive() && ((JsonPrimitive) jsonElement).isString();
    } else if (ClassUtils.isNumericType(parameterType)) {
        return jsonElement.isJsonPrimitive() && ((JsonPrimitive) jsonElement).isNumber();
    }

    // If we arrived here, assume somebody will know how to handle the json element, maybe customizing Gson's serialization
    return true;
}

From source file:com.softwarementors.extjs.djn.router.processor.standard.json.JsonRequestProcessor.java

License:Open Source License

@CheckForNull
private static JsonArray getMethodParametersJsonData(JsonObject object) {
    assert object != null;

    JsonElement data = object.get(JsonRequestData.DATA_ELEMENT);
    if (data == null) {
        RequestException ex = RequestException.forJsonElementMissing(JsonRequestData.DATA_ELEMENT);
        logger.error(ex.getMessage(), ex);
        throw ex;
    }//ww  w  .ja v a  2s.  c om

    if (data.isJsonNull()) {
        return null;
    }

    if (!data.isJsonNull() && !data.isJsonArray()) {
        RequestException ex = RequestException.forJsonElementMustBeAJsonArray(JsonRequestData.DATA_ELEMENT,
                data.toString());
        logger.error(ex.getMessage(), ex);
        throw ex;
    }

    return (JsonArray) data;
}