Examples with JsonElement com.google.gson.JsonElement used on opensource projects

Example 46 with JsonElement

use of com.google.gson.JsonElement in project weave by continuuity.

the class YarnWeaveRunnerService method getApplicationId.

/**
   * Decodes application ID stored inside the node data.
   * @param nodeData The node data to decode from. If it is {@code null}, this method would return {@code null}.
   * @return The ApplicationId or {@code null} if failed to decode.
   */
private ApplicationId getApplicationId(NodeData nodeData) {
    byte[] data = nodeData == null ? null : nodeData.getData();
    if (data == null) {
        return null;
    }
    Gson gson = new Gson();
    JsonElement json = gson.fromJson(new String(data, Charsets.UTF_8), JsonElement.class);
    if (!json.isJsonObject()) {
        LOG.warn("Unable to decode live data node.");
        return null;
    }
    JsonObject jsonObj = json.getAsJsonObject();
    json = jsonObj.get("data");
    if (!json.isJsonObject()) {
        LOG.warn("Property data not found in live data node.");
        return null;
    }
    try {
        ApplicationMasterLiveNodeData amLiveNode = gson.fromJson(json, ApplicationMasterLiveNodeData.class);
        return YarnUtils.createApplicationId(amLiveNode.getAppIdClusterTime(), amLiveNode.getAppId());
    } catch (Exception e) {
        LOG.warn("Failed to decode application live node data.", e);
        return null;
    }
}

Example 47 with JsonElement

use of com.google.gson.JsonElement in project buck by facebook.

the class ChromeTraceParser method parse.

/**
   * Parses a Chrome trace and stops parsing once all of the specified matchers have been
   * satisfied. This method parses only one Chrome trace event at a time, which avoids loading the
   * entire trace into memory.
   * @param pathToTrace is a relative path [to the ProjectFilesystem] to a Chrome trace in the
   *     "JSON Array Format."
   * @param chromeTraceEventMatchers set of matchers this invocation of {@code parse()} is trying to
   *     satisfy. Once a matcher finds a match, it will not consider any other events in the trace.
   * @return a {@code Map} where every matcher that found a match will have an entry whose key is
   *     the matcher and whose value is the one returned by
   *     {@link ChromeTraceEventMatcher#test(JsonObject, String)} without the {@link Optional}
   *     wrapper.
   */
public Map<ChromeTraceEventMatcher<?>, Object> parse(Path pathToTrace, Set<ChromeTraceEventMatcher<?>> chromeTraceEventMatchers) throws IOException {
    Set<ChromeTraceEventMatcher<?>> unmatchedMatchers = new HashSet<>(chromeTraceEventMatchers);
    Preconditions.checkArgument(!unmatchedMatchers.isEmpty(), "Must specify at least one matcher");
    Map<ChromeTraceEventMatcher<?>, Object> results = new HashMap<>();
    try (InputStream input = projectFilesystem.newFileInputStream(pathToTrace);
        JsonReader jsonReader = new JsonReader(new InputStreamReader(input))) {
        jsonReader.beginArray();
        Gson gson = new Gson();
        featureSearch: while (true) {
            // If END_ARRAY is the next token, then there are no more elements in the array.
            if (jsonReader.peek().equals(JsonToken.END_ARRAY)) {
                break;
            }
            // Verify and extract the name property before invoking any of the matchers.
            JsonElement eventEl = gson.fromJson(jsonReader, JsonElement.class);
            JsonObject event = eventEl.getAsJsonObject();
            JsonElement nameEl = event.get("name");
            if (nameEl == null || !nameEl.isJsonPrimitive()) {
                continue;
            }
            String name = nameEl.getAsString();
            // Prefer Iterator to Iterable+foreach so we can use remove().
            for (Iterator<ChromeTraceEventMatcher<?>> iter = unmatchedMatchers.iterator(); iter.hasNext(); ) {
                ChromeTraceEventMatcher<?> chromeTraceEventMatcher = iter.next();
                Optional<?> result = chromeTraceEventMatcher.test(event, name);
                if (result.isPresent()) {
                    iter.remove();
                    results.put(chromeTraceEventMatcher, result.get());
                    if (unmatchedMatchers.isEmpty()) {
                        break featureSearch;
                    }
                }
            }
        }
    }
    // We could throw if !unmatchedMatchers.isEmpty(), but that might be overbearing.
    return results;
}

Example 48 with JsonElement

use of com.google.gson.JsonElement in project JsonPath by jayway.

the class GsonJsonProviderTest method longs_are_unwrapped.

@Test
public void longs_are_unwrapped() {
    JsonElement node = using(GSON_CONFIGURATION).parse(JSON_DOCUMENT).read("$.long-max-property");
    long val = using(GSON_CONFIGURATION).parse(JSON_DOCUMENT).read("$.long-max-property", Long.class);
    assertThat(val).isEqualTo(Long.MAX_VALUE);
    assertThat(val).isEqualTo(node.getAsLong());
}

Example 49 with JsonElement

use of com.google.gson.JsonElement in project useful-java-links by Vedenin.

the class TreeModel method readJson.

/**
     *  Example to readJson using TreeModel
     */
private static void readJson() throws IOException {
    JsonParser parser = new JsonParser();
    JsonElement jsonElement = parser.parse("{\"message\":\"Hi\",\"place\":{\"name\":\"World!\"}}");
    JsonObject rootObject = jsonElement.getAsJsonObject();
    // get property "message"
    String message = rootObject.get("message").getAsString();
    // get place object
    JsonObject childObject = rootObject.getAsJsonObject("place");
    // get property "name"
    String place = childObject.get("name").getAsString();
    // print "Hi World!"*/
    System.out.println(message + " " + place);
}

Example 50 with JsonElement

use of com.google.gson.JsonElement in project malmo by Microsoft.

the class ObservationFromServer method writeObservationsToJSON.

@Override
public void writeObservationsToJSON(JsonObject json, MissionInit missionInit) {
    String jsonstring = "";
    synchronized (this.latestJsonStats) {
        jsonstring = this.latestJsonStats;
    }
    if (// "{}" is the empty JSON string.
    jsonstring.length() > 2) {
        // Parse the string into json:
        JsonParser parser = new JsonParser();
        JsonElement root = parser.parse(jsonstring);
        // Now copy the children of root into the provided json object:
        if (root.isJsonObject()) {
            JsonObject rootObj = root.getAsJsonObject();
            for (Map.Entry<String, JsonElement> entry : rootObj.entrySet()) {
                json.add(entry.getKey(), entry.getValue());
            }
        }
    }
}