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:org.structr.core.rest.JsonInputGSONAdapter.java

License:Open Source License

public static JsonInput deserialize(final JsonElement json, final JsonDeserializationContext context)
        throws JsonParseException {

    final JsonInput wrapper = new JsonInput();
    if (json.isJsonObject()) {

        final JsonObject obj = json.getAsJsonObject();

        for (final Entry<String, JsonElement> entry : obj.entrySet()) {

            final String key = entry.getKey();
            final JsonElement elem = entry.getValue();

            if (elem.isJsonNull()) {

                wrapper.add(key, null);//  ww w  .j a  v a  2 s.com

            } else if (elem.isJsonObject()) {

                wrapper.add(key, deserialize(elem, context));

            } else if (elem.isJsonArray()) {

                final JsonArray array = elem.getAsJsonArray();
                final List list = new LinkedList();

                for (final JsonElement element : array) {

                    if (element.isJsonPrimitive()) {

                        list.add(fromPrimitive((element.getAsJsonPrimitive())));

                    } else if (element.isJsonObject()) {

                        // create map of values
                        list.add(deserialize(element, context));
                    }
                }

                wrapper.add(key, list);

            } else if (elem.isJsonPrimitive()) {

                // wrapper.add(key, elem.getAsString());
                wrapper.add(key, fromPrimitive(elem.getAsJsonPrimitive()));
            }

        }

    } else if (json.isJsonArray()) {

        final JsonArray array = json.getAsJsonArray();
        for (final JsonElement elem : array) {

            if (elem.isJsonPrimitive()) {

                wrapper.add(elem.toString(), fromPrimitive(elem.getAsJsonPrimitive()));

            } else if (elem.isJsonObject()) {

                wrapper.add(elem.toString(), deserialize(elem, context));

            } else if (elem.isJsonArray()) {

                wrapper.add(elem.toString(), deserialize(elem, context));
            }
        }

    } else {

        // when we arrive here, the input element was
        // not one of the expected types => error
        throw new JsonSyntaxException("Invalid JSON, expecting object or array");
    }

    return wrapper;
}

From source file:org.structr.rest.JsonInputGSONAdapter.java

License:Open Source License

private JsonInput deserialize(JsonElement json, JsonDeserializationContext context) throws JsonParseException {

    JsonInput wrapper = new JsonInput();
    if (json.isJsonObject()) {

        JsonObject obj = json.getAsJsonObject();

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

            String key = entry.getKey();
            JsonElement elem = entry.getValue();

            if (elem.isJsonNull()) {

                wrapper.add(key, null);//w w w .  j  a  v a  2  s .  co  m

            } else if (elem.isJsonObject()) {

                wrapper.add(key, deserialize(elem, context));

            } else if (elem.isJsonArray()) {

                final JsonArray array = elem.getAsJsonArray();
                final List list = new LinkedList();

                for (JsonElement element : array) {

                    if (element.isJsonPrimitive()) {

                        list.add(fromPrimitive((element.getAsJsonPrimitive())));

                    } else if (element.isJsonObject()) {

                        // create map of values
                        list.add(deserialize(element, context));
                    }
                }

                wrapper.add(key, list);

            } else if (elem.isJsonPrimitive()) {

                // wrapper.add(key, elem.getAsString());
                wrapper.add(key, fromPrimitive(elem.getAsJsonPrimitive()));
            }

        }

    } else if (json.isJsonArray()) {

        JsonArray array = json.getAsJsonArray();
        for (JsonElement elem : array) {

            if (elem.isJsonPrimitive()) {

                wrapper.add(elem.toString(), fromPrimitive(elem.getAsJsonPrimitive()));

            } else if (elem.isJsonObject()) {

                wrapper.add(elem.toString(), deserialize(elem, context));

            } else if (elem.isJsonArray()) {

                wrapper.add(elem.toString(), deserialize(elem, context));
            }
        }
    }

    return wrapper;
}

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.ActionTypeAdapterFactory.java

License:Apache License

@Override
protected void beforeWrite(Action source, JsonElement toSerialize) {
    if (toSerialize == null || toSerialize.isJsonNull()) {
        return;/*from   w  w  w  .j  av  a  2 s  .  c o  m*/
    }

    JsonObject actionObj = toSerialize.getAsJsonObject();
    if (actionObj == null || actionObj.isJsonNull()) {
        return;
    }

    // rewrite parameters from a nested object (map) to properties on the action
    JsonElement paramsElem = actionObj.get(PROPERTY_PARAMETERS);
    if (paramsElem != null && !paramsElem.isJsonNull()) {
        JsonObject paramsObj = paramsElem.getAsJsonObject();
        actionObj.remove(PROPERTY_PARAMETERS);

        for (Entry<String, JsonElement> entry : paramsObj.entrySet()) {
            actionObj.add(entry.getKey(), entry.getValue());
        }
    }
}

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.ActionTypeAdapterFactory.java

License:Apache License

@Override
protected void afterRead(JsonElement deserialized) {
    if (deserialized == null || deserialized.isJsonNull()) {
        return;//  w  w  w.  j  a va  2 s .  c o  m
    }

    JsonObject actionObj = deserialized.getAsJsonObject();
    if (actionObj == null || actionObj.isJsonNull()) {
        return;
    }

    if (actionObj.has(PROPERTY_PARAMETERS)) {
        throw new IllegalArgumentException("Attempting to deserialize Action that contains a colliding "
                + PROPERTY_PARAMETERS + " property");
    }

    // temporary list of field names
    List<String> fields = new ArrayList<>();

    // rewrite parameters to a nested object (map)
    JsonObject paramsObj = new JsonObject();
    for (Entry<String, JsonElement> entry : actionObj.entrySet()) {
        // skip ID field
        if (PROPERTY_ID.equals(entry.getKey())) {
            continue;
        }

        String paramId = entry.getKey();
        fields.add(paramId); // to be removed later

        paramsObj.add(paramId, entry.getValue());
    }
    actionObj.add(PROPERTY_PARAMETERS, paramsObj);

    // remove all fields other than the list
    fields.forEach(field -> actionObj.remove(field));
}

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.ApplicationTypeAdapterFactory.java

License:Apache License

@Override
protected void beforeWrite(Application source, JsonElement toSerialize) {
    if (toSerialize == null || toSerialize.isJsonNull()) {
        return;/*from  w  w  w . j  a v  a  2  s.  co m*/
    }

    JsonObject appObj = toSerialize.getAsJsonObject();
    if (appObj == null || appObj.isJsonNull()) {
        return;
    }

    // remove widget IDs
    JsonElement widgetsElem = appObj.get(PROPERTY_WIDGETS);
    if (widgetsElem != null && !widgetsElem.isJsonNull()) {
        for (Entry<String, JsonElement> entry : widgetsElem.getAsJsonObject().entrySet()) {
            JsonElement widgetElem = entry.getValue();
            if (widgetElem == null || widgetElem.isJsonNull()) {
                continue;
            }
            widgetElem.getAsJsonObject().remove(PROPERTY_ID);
        }
    }

    // remove action IDs
    JsonElement actionsElem = appObj.get(PROPERTY_ACTIONS);
    if (actionsElem != null && !actionsElem.isJsonNull()) {
        for (Entry<String, JsonElement> entry : actionsElem.getAsJsonObject().entrySet()) {
            JsonElement actionElem = entry.getValue();
            if (actionElem == null || actionElem.isJsonNull()) {
                continue;
            }
            actionElem.getAsJsonObject().remove(PROPERTY_ID);
        }
    }
}

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.ApplicationTypeAdapterFactory.java

License:Apache License

@Override
protected void afterRead(JsonElement deserialized) {
    if (deserialized == null || deserialized.isJsonNull()) {
        return;//from   www . j  ava2 s  .  c o  m
    }

    JsonObject appObj = deserialized.getAsJsonObject();
    if (appObj == null || appObj.isJsonNull()) {
        return;
    }

    // inject widget IDs
    JsonElement widgetsElem = appObj.get(PROPERTY_WIDGETS);
    if (widgetsElem != null && !widgetsElem.isJsonNull()) {
        for (Entry<String, JsonElement> entry : widgetsElem.getAsJsonObject().entrySet()) {
            JsonElement widgetElem = entry.getValue();
            if (widgetElem == null || widgetElem.isJsonNull()) {
                continue;
            }
            widgetElem.getAsJsonObject().addProperty(PROPERTY_ID, entry.getKey());
        }
    }

    // inject action IDs
    JsonElement actionsElem = appObj.get(PROPERTY_ACTIONS);
    if (actionsElem != null && !actionsElem.isJsonNull()) {
        for (Entry<String, JsonElement> entry : actionsElem.getAsJsonObject().entrySet()) {
            JsonElement actionElem = entry.getValue();
            if (actionElem == null || actionElem.isJsonNull()) {
                continue;
            }
            actionElem.getAsJsonObject().addProperty(PROPERTY_ID, entry.getKey());
        }
    }
}

From source file:org.syphr.lametrictime.api.common.impl.typeadapters.UpdateActionTypeAdapterFactory.java

License:Apache License

@Override
protected void beforeWrite(UpdateAction source, JsonElement toSerialize) {
    if (toSerialize == null || toSerialize.isJsonNull()) {
        return;/*from w  ww . jav  a 2 s. co m*/
    }

    JsonObject actionObj = toSerialize.getAsJsonObject();
    if (actionObj == null || actionObj.isJsonNull()) {
        return;
    }

    // rewrite parameters map from {name => Parameter} to {name => value}
    JsonElement paramsElem = actionObj.get(PROPERTY_PARAMETERS);
    if (paramsElem != null && !paramsElem.isJsonNull()) {
        JsonObject paramsObj = paramsElem.getAsJsonObject();
        actionObj.remove(PROPERTY_PARAMETERS);

        JsonObject newParamsObj = new JsonObject();
        for (Entry<String, JsonElement> entry : paramsObj.entrySet()) {
            newParamsObj.add(entry.getKey(),
                    entry.getValue().getAsJsonObject().getAsJsonPrimitive(PROPERTY_VALUE));
        }
        actionObj.add(PROPERTY_PARAMETERS, newParamsObj);
    }
}

From source file:org.tallison.gramreaper.ingest.schema.AnalyzerDeserializer.java

License:Apache License

private static CharFilterFactory[] buildCharFilters(JsonElement el, String analyzerName) throws IOException {
    if (el == null || el.isJsonNull()) {
        return null;
    }// w w  w. ja va 2  s. com
    if (!el.isJsonArray()) {
        throw new IllegalArgumentException(
                "Expecting array for charfilters, but got:" + el.toString() + " for " + analyzerName);
    }
    JsonArray jsonArray = (JsonArray) el;
    List<CharFilterFactory> ret = new LinkedList<CharFilterFactory>();
    for (JsonElement filterMap : jsonArray) {
        if (!(filterMap instanceof JsonObject)) {
            throw new IllegalArgumentException(
                    "Expecting a map with \"factory\" string and \"params\" map in char filter factory;"
                            + " not: " + filterMap.toString() + " in " + analyzerName);
        }
        JsonElement factoryEl = ((JsonObject) filterMap).get(FACTORY);
        if (factoryEl == null || !factoryEl.isJsonPrimitive()) {
            throw new IllegalArgumentException(
                    "Expecting value for factory in char filter factory builder in:" + analyzerName);
        }
        String factoryName = factoryEl.getAsString();
        factoryName = factoryName.replaceAll("oala.", "org.apache.lucene.analysis.");

        JsonElement paramsEl = ((JsonObject) filterMap).get(PARAMS);
        Map<String, String> params = mapify(paramsEl);
        for (Map.Entry<String, String> e : params.entrySet()) {
            System.out.println("PARAM: " + e.getKey() + " : " + e.getValue());
        }
        String spiName = "";
        for (String s : CharFilterFactory.availableCharFilters()) {
            Class clazz = CharFilterFactory.lookupClass(s);
            if (clazz.getName().equals(factoryName)) {
                spiName = s;
                break;
            }
        }
        try {
            CharFilterFactory charFilterFactory = CharFilterFactory.forName(spiName, params);
            if (charFilterFactory instanceof ResourceLoaderAware) {
                ((ResourceLoaderAware) charFilterFactory)
                        .inform(new ClasspathResourceLoader(AnalyzerDeserializer.class));
            }
            ret.add(charFilterFactory);
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("While trying to load " + analyzerName + ": " + e.getMessage(),
                    e);
        }
    }
    if (ret.size() == 0) {
        return new CharFilterFactory[0];
    }
    return ret.toArray(new CharFilterFactory[ret.size()]);
}

From source file:org.tallison.gramreaper.ingest.schema.AnalyzerDeserializer.java

License:Apache License

private static TokenFilterFactory[] buildTokenFilterFactories(JsonElement el, String analyzerName)
        throws IOException {
    if (el == null || el.isJsonNull()) {
        return null;
    }/*  w  ww . j  a  v  a 2 s.  c  o  m*/
    if (!el.isJsonArray()) {
        throw new IllegalArgumentException(
                "Expecting array for tokenfilters, but got:" + el.toString() + " in " + analyzerName);
    }
    JsonArray jsonArray = (JsonArray) el;
    List<TokenFilterFactory> ret = new LinkedList<>();
    for (JsonElement filterMap : jsonArray) {
        if (!(filterMap instanceof JsonObject)) {
            throw new IllegalArgumentException(
                    "Expecting a map with \"factory\" string and \"params\" map in token filter factory;"
                            + " not: " + filterMap.toString() + " in " + analyzerName);
        }
        JsonElement factoryEl = ((JsonObject) filterMap).get(FACTORY);
        if (factoryEl == null || !factoryEl.isJsonPrimitive()) {
            throw new IllegalArgumentException(
                    "Expecting value for factory in token filter factory builder in " + analyzerName);
        }
        String factoryName = factoryEl.getAsString();
        factoryName = factoryName.startsWith("oala.")
                ? factoryName.replaceFirst("oala.", "org.apache.lucene.analysis.")
                : factoryName;

        JsonElement paramsEl = ((JsonObject) filterMap).get(PARAMS);
        Map<String, String> params = mapify(paramsEl);
        String spiName = "";
        for (String s : TokenFilterFactory.availableTokenFilters()) {
            Class clazz = TokenFilterFactory.lookupClass(s);
            if (clazz.getName().equals(factoryName)) {
                spiName = s;
                break;
            }
        }

        try {
            TokenFilterFactory tokenFilterFactory = TokenFilterFactory.forName(spiName, params);
            if (tokenFilterFactory instanceof ResourceLoaderAware) {
                ((ResourceLoaderAware) tokenFilterFactory)
                        .inform(new ClasspathResourceLoader(AnalyzerDeserializer.class));
            }
            ret.add(tokenFilterFactory);
        } catch (IllegalArgumentException e) {
            throw new IllegalArgumentException("While loading " + analyzerName, e);
        }
    }
    if (ret.size() == 0) {
        return new TokenFilterFactory[0];
    }
    return ret.toArray(new TokenFilterFactory[ret.size()]);
}

From source file:org.terasology.persistence.typeHandling.gson.GsonTypeHandlerAdapter.java

License:Apache License

@Override
public T read(JsonReader in) throws IOException {
    JsonElement value = Streams.parse(in);
    if (value.isJsonNull()) {
        return null;
    }/*  w  w  w.j a  v a  2 s .  c o m*/

    return deserializer.deserialize(value, typeToken.getType(),
            (JsonDeserializationContext) ReflectionUtil.readField(gson, "deserializationContext"));
}