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:com.tsc9526.monalisa.tools.json.MelpJson.java

License:Open Source License

private static Object toObject(JsonElement e) {
    if (e == null || e.isJsonNull()) {
        return null;
    } else if (e.isJsonPrimitive()) {
        return primitive((JsonPrimitive) e);
    } else if (e.isJsonObject()) {
        return parseToDataMap(e.getAsJsonObject());
    } else if (e.isJsonArray()) {
        List<Object> list = new ArrayList<Object>();

        JsonArray array = (JsonArray) e;
        for (int i = 0; i < array.size(); i++) {
            JsonElement je = array.get(i);

            Object v = toObject(je);

            list.add(v);/*from w ww .  ja v a 2s . co m*/
        }
        return list;
    } else {
        return e;
    }
}

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From source file:com.uprizer.sensearray.freetools.json.GsonPrettyPrinter.java

License:Open Source License

private List<String> toStringList(final JsonElement je) {
    if (je.isJsonPrimitive())
        return Collections.singletonList(je.getAsJsonPrimitive().toString());
    if (je.isJsonArray()) {
        final JsonArray jsonArray = je.getAsJsonArray();
        return arrayToStringList(jsonArray);
    } else if (je.isJsonObject()) {
        final JsonObject jsonObject = je.getAsJsonObject();
        return objectToStringList(jsonObject);
    } else if (je.isJsonNull()) {
        return Collections.singletonList("null");
    } else {/*from  w  ww. jav a2s  .com*/
        throw new RuntimeException("Unsupported Json element: " + je.getClass().getName());
    }
}

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From source file:com.urswolfer.gerrit.client.rest.http.GerritRestClient.java

License:Apache License

@Override
public JsonElement requestJson(String path, String requestBody, HttpVerb verb) throws RestApiException {
    try {/*  w  w  w .  j a  v a 2  s.co m*/
        HttpResponse response = requestRest(path, requestBody, verb);

        HttpEntity entity = response.getEntity();
        if (entity == null) {
            return null;
        }

        checkContentType(entity);

        JsonElement ret = parseResponse(entity.getContent());
        if (ret.isJsonNull()) {
            throw new RestApiException("Unexpectedly empty response.");
        }
        return ret;
    } catch (IOException e) {
        throw new RestApiException("Request failed.", e);
    }
}

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From source file:com.vmware.admiral.closures.services.adapter.AdmiralAdapterService.java

License:Open Source License

private LogConfig prepareLogConfig(ContainerConfiguration configuration) {
    JsonElement jsonLogConfig = configuration.logConfiguration;
    LogConfig logConfig = new LogConfig();
    if (jsonLogConfig == null || !jsonLogConfig.isJsonObject()) {
        // set default log configuration
        logConfig.type = "json-file";
        logConfig.config = new HashMap<>();
        logConfig.config.put("max-size", MAX_LOG_FILE_SIZE);
        return logConfig;
    }//ww  w.j  a  va2 s  . c o  m

    JsonObject jsonObject = (JsonObject) jsonLogConfig;
    JsonElement typeElement = jsonObject.get("type");
    if (typeElement == null || typeElement.isJsonNull()) {
        logConfig.type = "json-file";
    } else {
        logConfig.type = typeElement.getAsString();
    }

    Map<String, String> configMap = new HashMap<>();
    JsonElement configElement = jsonObject.get("config");
    if (configElement == null || configElement.isJsonNull()) {
        logConfig.config = configMap;
        return logConfig;
    }
    JsonObject jsonConfig = configElement.getAsJsonObject();
    for (Map.Entry<String, JsonElement> entry : jsonConfig.entrySet()) {
        configMap.put(entry.getKey(), entry.getValue().getAsString());
    }

    logConfig.config = configMap;
    return logConfig;
}

---

From source file:com.vmware.admiral.compute.container.maintenance.ContainerStatsEvaluator.java

License:Open Source License

private static void calculateCpuUsage(ContainerStats state, Map<String, JsonElement> stats) {
    try {//from w w  w.  j  a v a  2 s .  c  o  m
        JsonElement cpu_stats_json = stats.get("cpu_stats");
        if (cpu_stats_json == null || cpu_stats_json.isJsonNull()) {
            Utils.logWarning("cpu_stats is null.");
            return;
        }
        JsonObject cpu_stats = cpu_stats_json.getAsJsonObject();

        JsonElement systemCpuUsageValue = cpu_stats.get("system_cpu_usage");
        if (systemCpuUsageValue == null || systemCpuUsageValue.isJsonNull()) {
            Utils.logWarning("system_cpu_usage is null.");
            return;
        }
        long system_cpu_usage = systemCpuUsageValue.getAsLong();

        JsonElement cpu_usage_json = cpu_stats.get("cpu_usage");
        if (cpu_usage_json == null || cpu_usage_json.isJsonNull()) {
            Utils.logWarning("cpu_usage is null.");
            return;
        }
        JsonObject cpu_usage = cpu_usage_json.getAsJsonObject();

        JsonElement totalUsageValue = cpu_usage.get("total_usage");
        if (totalUsageValue == null || totalUsageValue.isJsonNull()) {
            Utils.logWarning("totalUsageValue is null.");
            return;
        }
        long total_usage = totalUsageValue.getAsLong();

        JsonElement percpu_usage_json = cpu_usage.get("percpu_usage");
        if (percpu_usage_json == null || percpu_usage_json.isJsonNull()) {
            Utils.logWarning("percpu_usage is null.");
            return;
        }
        JsonArray percpu_usage = percpu_usage_json.getAsJsonArray();

        JsonElement precpu_stats_json = stats.get("precpu_stats");
        if (precpu_stats_json == null || precpu_stats_json.isJsonNull()) {
            Utils.logWarning("precpu_stats is null.");
            return;
        }
        JsonObject precpu_stats = precpu_stats_json.getAsJsonObject();

        JsonElement system_cpu_usage_json = precpu_stats.get("system_cpu_usage");
        if (system_cpu_usage_json == null || system_cpu_usage_json.isJsonNull()) {
            Utils.logWarning("system_cpu_usage is null.");
            return;
        }
        long presystem_cpu_usage = system_cpu_usage_json.getAsLong();

        JsonElement precpu_usage_json = precpu_stats.get("cpu_usage");
        if (precpu_usage_json == null || precpu_usage_json.isJsonNull()) {
            Utils.logWarning("precpu_usage is null.");
            return;
        }
        JsonObject precpu_usage = precpu_usage_json.getAsJsonObject();

        JsonElement pretotal_usage_json = precpu_usage.get("total_usage");
        if (pretotal_usage_json == null || pretotal_usage_json.isJsonNull()) {
            Utils.logWarning("total_usage is null.");
            return;
        }

        long pretotal_usage = pretotal_usage_json.getAsLong();

        long cpuDelta = total_usage - pretotal_usage;
        long systemDelta = system_cpu_usage - presystem_cpu_usage;

        if (systemDelta > 0 && cpuDelta > 0) {
            double cpuUsage = (((double) cpuDelta / systemDelta) * percpu_usage.size()) * 100.0;
            state.cpuUsage = Math.round(cpuUsage * 100d) / 100d;
        }

    } catch (Exception e) {
        Utils.logWarning("Error during container stats CPU usage calculations: %s", Utils.toString(e));
    }
}

---

From source file:com.vmware.admiral.compute.container.maintenance.ContainerStatsEvaluator.java

License:Open Source License

private static void setContainerStopped(ContainerStats state, Map<String, JsonElement> stats) {
    try {/*from  www .j  a  v a 2s  .  co m*/
        JsonElement read_json = stats.get("read");
        if (read_json == null || read_json.isJsonNull()) {
            Utils.logWarning("read is null.");
            return;
        }
        String read = read_json.getAsString();
        state.containerStopped = Boolean.FALSE;
        if (CONTAINER_STOPPED_TIME.equals(read)) {
            state.containerStopped = Boolean.TRUE;
        }
    } catch (Exception e) {
        Utils.logWarning("Error during container stats status calculations: %s", Utils.toString(e));
    }
}

---

From source file:com.vmware.dcp.common.serialization.ObjectMapTypeConverter.java

License:Open Source License

@Override
public Map<String, Object> deserialize(JsonElement json, Type unused, JsonDeserializationContext context)
        throws JsonParseException {

    if (!json.isJsonObject()) {
        throw new JsonParseException("The json element is not valid");
    }/* w ww.  ja  va 2  s .c  om*/

    Map<String, Object> result = new HashMap<String, Object>();
    JsonObject jsonObject = json.getAsJsonObject();
    for (Entry<String, JsonElement> entry : jsonObject.entrySet()) {
        String key = entry.getKey();
        JsonElement element = entry.getValue();
        if (element.isJsonObject()) {
            result.put(key, element.toString());
        } else if (element.isJsonNull()) {
            result.put(key, null);
        } else if (element.isJsonPrimitive()) {
            result.put(key, element.getAsString());
        } else {
            throw new JsonParseException("The json element is not valid for key:" + key + " value:" + element);
        }
    }
    return result;
}

---

From source file:com.vmware.xenon.common.serialization.ObjectCollectionTypeConverter.java

License:Open Source License

@Override
public Collection<Object> deserialize(JsonElement json, Type type, JsonDeserializationContext context)
        throws JsonParseException {

    if (!json.isJsonArray()) {
        throw new JsonParseException("Expecting a json array object but found: " + json);
    }//w  ww  .j  ava2  s.co  m

    Collection<Object> result;
    if (TYPE_SET.equals(type)) {
        result = new HashSet<>();
    } else if (TYPE_LIST.equals(type) || TYPE_COLLECTION.equals(type)) {
        result = new LinkedList<>();
    } else {
        throw new JsonParseException("Unexpected target type: " + type);
    }

    JsonArray jsonArray = json.getAsJsonArray();
    for (JsonElement entry : jsonArray) {
        if (entry.isJsonNull()) {
            result.add(null);
        } else if (entry.isJsonPrimitive()) {
            JsonPrimitive elem = entry.getAsJsonPrimitive();
            Object value = null;
            if (elem.isBoolean()) {
                value = elem.getAsBoolean();
            } else if (elem.isString()) {
                value = elem.getAsString();
            } else if (elem.isNumber()) {
                // We don't know if this is an integer, long, float or double...
                BigDecimal num = elem.getAsBigDecimal();
                try {
                    value = num.longValueExact();
                } catch (ArithmeticException e) {
                    value = num.doubleValue();
                }
            } else {
                throw new RuntimeException("Unexpected value type for json element:" + elem);
            }
            result.add(value);
        } else {
            // keep JsonElement to prevent stringified json issues
            result.add(entry);
        }
    }
    return result;
}

---

From source file:com.wallellen.wechat.common.util.json.GsonHelper.java

License:Open Source License

public static boolean isNull(JsonElement element) {
    return element == null || element.isJsonNull();
}

---

From source file:com.wallellen.wechat.mp.util.json.WxMpMassNewsArticleGsonAdapter.java

License:Open Source License

public WxMpMassNews.WxMpMassNewsArticle deserialize(JsonElement jsonElement, Type type,
        JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
    JsonObject articleInfo = jsonElement.getAsJsonObject();
    WxMpMassNews.WxMpMassNewsArticle article = new WxMpMassNews.WxMpMassNewsArticle();

    JsonElement title = articleInfo.get("title");
    if (title != null && !title.isJsonNull()) {
        article.setTitle(GsonHelper.getAsString(title));
    }// w  ww .j a  v  a2 s. c  o  m
    JsonElement content = articleInfo.get("content");
    if (content != null && !content.isJsonNull()) {
        article.setContent(GsonHelper.getAsString(content));
    }
    JsonElement contentSourceUrl = articleInfo.get("content_source_url");
    if (contentSourceUrl != null && !contentSourceUrl.isJsonNull()) {
        article.setContentSourceUrl(GsonHelper.getAsString(contentSourceUrl));
    }
    JsonElement author = articleInfo.get("author");
    if (author != null && !author.isJsonNull()) {
        article.setAuthor(GsonHelper.getAsString(author));
    }
    JsonElement digest = articleInfo.get("digest");
    if (digest != null && !digest.isJsonNull()) {
        article.setDigest(GsonHelper.getAsString(digest));
    }
    JsonElement thumbMediaId = articleInfo.get("thumb_media_id");
    if (thumbMediaId != null && !thumbMediaId.isJsonNull()) {
        article.setThumbMediaId(GsonHelper.getAsString(thumbMediaId));
    }
    JsonElement showCoverPic = articleInfo.get("show_cover_pic");
    if (showCoverPic != null && !showCoverPic.isJsonNull()) {
        article.setShowCoverPic(GsonHelper.getAsBoolean(showCoverPic));
    }
    return article;
}

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