List of usage examples for com.google.gson JsonNull INSTANCE
JsonNull INSTANCE
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From source file:com.talvish.tales.serialization.json.translators.MapToJsonArrayTranslator.java
License:Apache License
/** * Translates the received object into a json array with a key/value objects. * If the object is of the wrong type or translator doesn't return JsonElements, a TranslationException will occur. *///from ww w . ja va 2s .c om @Override public Object translate(Object anObject) { Object returnValue; if (anObject == null) { returnValue = JsonNull.INSTANCE; } else { try { Map<?, ?> map = (Map<?, ?>) anObject; JsonArray jsonArray = new JsonArray(); JsonObject jsonEntry; TypeFormatAdapter typeAdapter; for (Entry<?, ?> entry : map.entrySet()) { jsonEntry = new JsonObject(); // translate the key side if (keyTranslator == null) { // meaning we have more than one so didn't pull out the only translator // we need to find the translator to use // then save out the key type // and the key value typeAdapter = keyTypeAdapters.get(entry.getKey().getClass()); if (typeAdapter == null) { throw new TranslationException(String.format( "An object of type '%s' was attempting to be converted to a json object as a key in a map, but this object isn't supported", entry.getKey().getClass().getName())); } else { jsonEntry.addProperty("key_type", typeAdapter.getName()); jsonEntry.add("key", (JsonElement) typeAdapter.getToFormatTranslator().translate(entry.getKey())); } } else { jsonEntry.add("key", (JsonElement) keyTranslator.translate(entry.getKey())); } // translate the value side if (valueTranslator == null) { // meaning we have more than one so didn't pull out the only translator // we need to find the translator to use // then save out the key type // and the key value typeAdapter = valueTypeAdapters.get(entry.getValue().getClass()); if (typeAdapter == null) { throw new TranslationException(String.format( "An object of type '%s' was attempting to be converted to a json object as a value in a map, but this object isn't supported", entry.getValue().getClass().getName())); } else { jsonEntry.addProperty("value_type", typeAdapter.getName()); jsonEntry.add("value", (JsonElement) typeAdapter.getToFormatTranslator().translate(entry.getValue())); } } else { jsonEntry.add("value", (JsonElement) valueTranslator.translate(entry.getValue())); } jsonArray.add(jsonEntry); } returnValue = jsonArray; } catch (ClassCastException e) { throw new TranslationException(e); } } return returnValue; }
From source file:com.talvish.tales.serialization.json.translators.NumberToJsonPrimitiveTranslator.java
License:Apache License
/** * Translates the received object into a json primitive. * If the object is of the wrong type, a TranslationException will occur. *//*from w ww . j ava 2s. com*/ @Override public Object translate(Object anObject) { try { if (anObject == null) { return JsonNull.INSTANCE; } else { return new JsonPrimitive((Number) anObject); } } catch (ClassCastException e) { throw new TranslationException(e); } }
From source file:com.talvish.tales.serialization.json.translators.ObjectToJsonObjectTranslator.java
License:Apache License
/** * Translates the received object into a json primitive. * If the object is of the wrong type, a TranslationException will occur. *//* w w w. ja v a 2s . c o m*/ @Override public Object translate(Object anObject) { Object returnValue; if (anObject == null) { returnValue = JsonNull.INSTANCE; } else { returnValue = typeMap.getData(anObject); } return returnValue; }
From source file:com.talvish.tales.serialization.json.translators.ObjectToJsonPrimitiveTranslator.java
License:Apache License
/** * Translates the received object into a json primitive. * If the object is of the wrong type, a TranslationException will occur. *//*from ww w.j av a 2 s . co m*/ @Override public Object translate(Object anObject) { if (anObject == null) { return JsonNull.INSTANCE; } else { return new JsonPrimitive(anObject.toString()); } }
From source file:com.talvish.tales.serialization.json.translators.PolymorphicObjectToJsonObjectTranslator.java
License:Apache License
/** * Translates the received object into the appropriate json representation. * If the object is of the wrong type or the translator used doesn't produce * JsonElements's then a TranslationException will occur. *///from ww w. j a v a 2s.co m @Override public Object translate(Object anObject) { Object returnValue; if (anObject == null) { returnValue = JsonNull.INSTANCE; } else { TypeFormatAdapter typeAdapter = typeAdapters.get(anObject.getClass()); if (typeAdapter == null) { throw new TranslationException(String.format( "An object of type '%s' was attempting to be converted to a json object, but this object isn't supported", anObject.getClass().getName())); } else { try { JsonObject jsonEntry = new JsonObject(); jsonEntry.addProperty("value_type", typeAdapter.getName()); jsonEntry.add("value", (JsonElement) typeAdapter.getToFormatTranslator().translate(anObject)); returnValue = jsonEntry; } catch (ClassCastException e) { throw new TranslationException(e); } } } return returnValue; }
From source file:com.talvish.tales.serialization.json.translators.StringToJsonElementToChainTranslator.java
License:Apache License
@Override public Object translate(Object anObject) { Object returnValue;//w ww . j a v a 2 s . co m if (anObject == null) { returnValue = chainedTranslator.translate(JsonNull.INSTANCE); } else { try { // NOTE: there is a bug in GSON that if the string is missing an ending curly brace then it doesn't report a json parsing exception returnValue = chainedTranslator.translate(parser.parse((String) anObject)); } catch (JsonParseException e) { throw new TranslationException(e); } catch (ClassCastException e) { throw new TranslationException(e); } } return returnValue; }
From source file:com.talvish.tales.serialization.json.translators.StringToJsonPrimitiveTranslator.java
License:Apache License
/** * Translates the received object into a json primitive. * If the object is of the wrong type, a TranslationException will occur. *///w w w. j a v a 2s. c o m @Override public Object translate(Object anObject) { try { if (anObject == null) { return JsonNull.INSTANCE; } else { return new JsonPrimitive((String) anObject); } } catch (ClassCastException e) { throw new TranslationException(e); } }
From source file:com.vaadin.addon.charts.model.gsonhelpers.DataSeriesItemTypeAdapterFactory.java
private TypeAdapter<DataSeriesItem> customizeMyClassAdapter(Gson gson, TypeToken<DataSeriesItem> type) { final TypeAdapter<DataSeriesItem> delegate = gson.getDelegateAdapter(this, type); final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class); return new TypeAdapter<DataSeriesItem>() { @Override/*from w w w.j a va 2 s. c o m*/ public void write(JsonWriter out, DataSeriesItem value) throws IOException { if (value.isCustomized()) { elementAdapter.write(out, delegate.toJsonTree(value)); } else { Number x = value.getX(); Number y = value.getY(); if (x != null) { JsonArray jsonArray = new JsonArray(); jsonArray.add(new JsonPrimitive(x)); if (y != null) { jsonArray.add(new JsonPrimitive(y)); } else if (value.getLow() != null) { jsonArray.add(new JsonPrimitive(value.getLow())); jsonArray.add(new JsonPrimitive(value.getHigh())); } else { jsonArray.add(JsonNull.INSTANCE); jsonArray.add(JsonNull.INSTANCE); } elementAdapter.write(out, jsonArray); } else { // If no x set, make it like list series, just number or // min-max pairs if (y != null) { elementAdapter.write(out, new JsonPrimitive(y)); } else { JsonArray jsonArray = new JsonArray(); jsonArray.add(new JsonPrimitive(value.getLow())); jsonArray.add(new JsonPrimitive(value.getHigh())); elementAdapter.write(out, jsonArray); } } } } // This is never used @Override public DataSeriesItem read(JsonReader in) throws IOException { JsonElement tree = elementAdapter.read(in); return delegate.fromJsonTree(tree); } }; }
From source file:com.vmware.admiral.closures.drivers.nashorn.EmbeddedNashornJSDriver.java
License:Open Source License
@SuppressWarnings({ "restriction", "unchecked" })
private JsonElement convertToJsonElement(ScriptEngine engine, Object val) {
if (val == null) {
return JsonNull.INSTANCE;
} else if (val instanceof String) {
return new JsonPrimitive((String) val);
} else if (val instanceof Number) {
return new JsonPrimitive((Number) val);
} else if (val instanceof Boolean) {
return new JsonPrimitive((Boolean) val);
} else if (val instanceof Object[]) {
JsonArray jsArray = new JsonArray();
Object[] nums = (Object[]) val;
for (Object n : nums) {
jsArray.add(convertToJsonElement(engine, n));
}/*from ww w. j a va 2s. c om*/
return jsArray;
} else if (val instanceof List) {
JsonArray jsArray = new JsonArray();
List<Object> objs = (List<Object>) val;
for (Object o : objs) {
jsArray.add(convertToJsonElement(engine, o));
}
return jsArray;
} else if (val instanceof ScriptObjectMirror) {
ScriptObjectMirror m = (ScriptObjectMirror) val;
if (m.isArray()) {
List<Object> list = m.values().stream().collect(Collectors.toList());
return convertToJsonElement(engine, list);
} else {
JsDateWrap jsDate = ((Invocable) engine).getInterface(val, JsDateWrap.class);
if (jsDate != null) {
long timestampLocalTime = jsDate.getTime();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(timestampLocalTime);
val = calendar.getTime();
}
String stringified = Utils.toJson(val);
return Utils.fromJson(stringified, JsonElement.class);
}
}
return new JsonPrimitive(val.toString());
}
From source file:com.vmware.admiral.closures.util.ClosureUtils.java
License:Open Source License
private static JsonElement getPrimitiveJsonElement(JsonNode node) { if (node.isNull()) { return JsonNull.INSTANCE; } else if (node.isNumber()) { return new JsonPrimitive(node.numberValue()); }/*from ww w . java2s. c o m*/ com.google.gson.JsonParser parser = new com.google.gson.JsonParser(); return parser.parse(node.asText()); }