Example usage for com.google.gson JsonNull INSTANCE

Introduction

In this page you can find the example usage for com.google.gson JsonNull INSTANCE.

Prototype

JsonNull INSTANCE

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Document

singleton for JsonNull

Usage

From source file:org.sprintapi.hyperdata.gson.GsonHyperDataSerializer.java

License:Apache License

@Override
public JsonElement serialize(HyperMap src, Type typeOfSrc, JsonSerializationContext context) {
    if (src == null) {
        return JsonNull.INSTANCE;
    }//  w w  w. j a va 2s .c  om

    JsonObject obj = new JsonObject();

    final Map<String, Object> metadata = src.getMetadata();
    if (metadata != null) {
        for (String name : metadata.keySet()) {
            Object value = metadata.get(name);
            obj.add(Constants.META_CHAR.concat(name), context.serialize(value));
        }
    }
    for (String name : src.names()) {
        Object value = src.get(name);
        obj.add(name, context.serialize(value));
    }
    return obj;
}

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From source file:org.structr.core.graph.GraphObjectModificationState.java

License:Open Source License

private JsonElement toElement(final Object value) {

    if (value != null) {

        if (value instanceof String) {

            return new JsonPrimitive((String) value);

        } else if (value instanceof Number) {

            return new JsonPrimitive((Number) value);

        } else if (value instanceof Boolean) {

            return new JsonPrimitive((Boolean) value);

        } else if (value.getClass().isArray()) {

            final JsonArray arr = new JsonArray();
            final Object[] values = (Object[]) value;

            for (final Object v : values) {
                arr.add(toElement(v));//from  w ww  . j  a v a  2 s.  c  o m
            }

            return arr;

        } else {

            return new JsonPrimitive(value.toString());
        }
    }

    return JsonNull.INSTANCE;
}

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

License:Apache License

/**
 * Takes a reader in any state and returns the next value as a JsonElement.
 *//*from w ww  .j ava 2  s .  c om*/
private static JsonElement parse(JsonReader reader) throws JsonParseException {
    boolean isEmpty = true;
    try {
        reader.peek();
        isEmpty = false;
        return RuntimeTypeAdapterFactory.JSON_ELEMENT.read(reader);
    } catch (EOFException e) {
        /*
         * For compatibility with JSON 1.5 and earlier, we return a JsonNull for
         * empty documents instead of throwing.
         */
        if (isEmpty) {
            return JsonNull.INSTANCE;
        }
        // The stream ended prematurely so it is likely a syntax error.
        throw new JsonSyntaxException(e);
    } catch (MalformedJsonException e) {
        throw new JsonSyntaxException(e);
    } catch (IOException e) {
        throw new JsonIOException(e);
    } catch (NumberFormatException e) {
        throw new JsonSyntaxException(e);
    }
}

---

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

License:Apache License

@Override
public PersistedData create(Iterable<PersistedData> data) {
    JsonArray result = new JsonArray();
    for (PersistedData val : data) {
        if (val != null) {
            result.add(((GsonPersistedData) val).getElement());
        } else {//from w  w w. j  ava  2 s  . c  o m
            result.add(JsonNull.INSTANCE);
        }
    }
    return new GsonPersistedData(result);
}

---

From source file:org.terasology.rendering.nui.widgets.models.JsonTreeConverter.java

License:Apache License

/**
 * @param tree A tree hierarchy based on a {@link JsonElement}, created by the serialize() method.
 * @return The initial {@link JsonElement} reconstructed from the tree.
 *///from   www.  j a  v  a2s. c  om
public static JsonElement deserialize(Tree<JsonTreeNode> tree) {
    JsonTreeNode node = tree.getValue();
    if (node.getType() == JsonTreeNode.ElementType.KEY_VALUE_PAIR
            || node.getType() == JsonTreeNode.ElementType.VALUE) {
        Object value = node.getValue();
        if (value instanceof Boolean) {
            return new JsonPrimitive((Boolean) value);
        } else if (value instanceof Number) {
            return new JsonPrimitive((Number) value);
        } else if (value instanceof String) {
            return new JsonPrimitive((String) value);
        } else {
            return JsonNull.INSTANCE;
        }
    } else if (node.getType() == JsonTreeNode.ElementType.ARRAY) {
        JsonArray array = new JsonArray();
        for (Tree<JsonTreeNode> child : tree.getChildren()) {
            array.add(deserialize(child));
        }
        return array;
    } else if (node.getType() == JsonTreeNode.ElementType.OBJECT) {
        JsonObject object = new JsonObject();
        for (Tree<JsonTreeNode> child : tree.getChildren()) {
            object.add(child.getValue().getKey(), deserialize(child));
        }
        return object;
    } else {
        return JsonNull.INSTANCE;
    }
}

---

From source file:org.terasology.rendering.nui.widgets.treeView.JsonTreeConverter.java

License:Apache License

/**
 * @param tree A tree hierarchy based on a {@link JsonElement} as generated by the serialize() method.
 * @return The initial {@link JsonElement} reconstructed from the tree.
 *//*  w  w  w  .ja  v  a  2  s  .  c o  m*/
public static JsonElement deserialize(Tree<JsonTreeValue> tree) {
    JsonTreeValue value = tree.getValue();
    if (value.getType() == JsonTreeValue.Type.KEY_VALUE_PAIR || value.getType() == JsonTreeValue.Type.VALUE) {
        Object primitive = value.getValue();
        if (primitive instanceof Boolean) {
            return new JsonPrimitive((Boolean) primitive);
        } else if (primitive instanceof Number) {
            return new JsonPrimitive((Number) primitive);
        } else if (primitive instanceof String) {
            return new JsonPrimitive((String) primitive);
        } else {
            return JsonNull.INSTANCE;
        }
    } else if (value.getType() == JsonTreeValue.Type.ARRAY) {
        JsonArray array = new JsonArray();
        for (Tree<JsonTreeValue> child : tree.getChildren()) {
            array.add(deserialize(child));
        }
        return array;
    } else if (value.getType() == JsonTreeValue.Type.OBJECT) {
        JsonObject object = new JsonObject();
        for (Tree<JsonTreeValue> child : tree.getChildren()) {
            object.add(child.getValue().getKey(), deserialize(child));
        }
        return object;
    } else {
        return JsonNull.INSTANCE;
    }
}

---

From source file:org.tuleap.mylyn.task.ui.internal.wizards.query.QueryFieldVisitor.java

License:Open Source License

/**
 * Constructor.// www .  j a  v a2 s.  c o m
 *
 * @param group
 *            The parent composite.
 * @param gson
 *            The Gson to use to deserialize query parameters.
 * @param page
 *            The wizard page.
 */
public QueryFieldVisitor(Composite group, Gson gson, final TuleapCustomQueryPage page) {
    this.group = group;
    this.gson = gson;
    this.page = page;
    IRepositoryQuery currentQuery = page.getQuery();
    String jsonCriteria = null;
    if (currentQuery != null) {
        jsonCriteria = currentQuery.getAttribute(ITuleapQueryConstants.QUERY_CUSTOM_CRITERIA);
    }
    JsonElement jsonElement;
    if (jsonCriteria != null) {
        jsonElement = new JsonParser().parse(jsonCriteria);
    } else {
        jsonElement = JsonNull.INSTANCE;
    }
    if (jsonElement.isJsonObject()) {
        currentQueryCriteria = jsonElement.getAsJsonObject();
    } else {
        currentQueryCriteria = new JsonObject();
    }
    elements = new ArrayList<AbstractTuleapCustomQueryElement<?>>();
}

---

From source file:org.wso2.carbon.mdm.services.android.util.AndroidDeviceUtils.java

License:Open Source License

private static String getProperty(String properties, String needed) {
    // This is not a key value pair. value is the immediate element to its filed name.
    // Ex:/*from  ww w  .  j a  v  a2 s  .com*/
    // [{"name":"ENCRYPTION_ENABLED","value":"false"},{"name":"PASSCODE_ENABLED","value":"true"},
    // {"name":"BATTERY_LEVEL","value":"100"},{"name":"INTERNAL_TOTAL_MEMORY","value":"0.76"}]
    JsonElement jsonElement = new JsonParser().parse(properties);
    JsonArray jsonArray = jsonElement.getAsJsonArray();
    for (JsonElement element : jsonArray) {
        if (element.isJsonObject()) {
            JsonObject jsonObject = element.getAsJsonObject();
            if (jsonObject.has("name") && jsonObject.get("name").getAsString().equalsIgnoreCase(needed)) {
                if (jsonObject.has("value") && jsonObject.get("value") != JsonNull.INSTANCE) {
                    return jsonObject.get("value").getAsString().replace("%", "");
                } else {
                    return "";
                }
            }
        }
    }
    return "";
}

---

From source file:org.wso2.carbon.uuf.renderablecreator.hbs.internal.serialize.ScriptObjectMirrorSerializer.java

License:Open Source License

/**
 * {@inheritDoc}//from w w  w .j a  v a  2s.c o  m
 */
@Override
public JsonElement serialize(ScriptObjectMirror jsObj, Type type, JsonSerializationContext context) {
    if ((jsObj == null) || ScriptObjectMirror.isUndefined(jsObj) || jsObj.isFunction()) {
        return JsonNull.INSTANCE;
    }

    if (jsObj.isArray()) {
        JsonArray jsonArray = new JsonArray();
        for (Object item : jsObj.values()) {
            jsonArray.add(serializeFurther(context.serialize(item), context));
        }
        return jsonArray;
    }
    if (jsObj.isEmpty()) {
        return new JsonObject();
    }

    JsonObject jsonObject = new JsonObject();
    for (String key : jsObj.getOwnKeys(false)) {
        jsonObject.add(key, serializeFurther(jsObj.getMember(key), context));
    }
    return jsonObject;
}

---

From source file:org.wso2.carbon.uuf.renderablecreator.hbs.internal.serialize.ScriptObjectMirrorSerializer.java

License:Open Source License

private JsonElement serializeFurther(Object src, JsonSerializationContext context) {
    return ScriptObjectMirror.isUndefined(src) ? JsonNull.INSTANCE : context.serialize(src);
}

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