Example usage for com.google.gson JsonNull INSTANCE

List of usage examples for com.google.gson JsonNull INSTANCE

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Prototype

JsonNull INSTANCE

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singleton for JsonNull

Usage

From source file:com.codenvy.ide.ext.java.server.TypeBindingConvector.java

License:Open Source License

private static JsonElement toJsonAnnotations(AnnotationBinding[] annotations) {
    if (annotations == null)
        return JsonNull.INSTANCE;
    JsonArray array = new JsonArray();
    for (AnnotationBinding annotation : annotations) {
        array.add(toJsonAnnotation(annotation));
    }//from  ww  w  .  j a  v a 2s .c  om
    return array;
}

From source file:com.codenvy.ide.ext.java.server.TypeBindingConvector.java

License:Open Source License

private static JsonElement toJsonAnnotation(AnnotationBinding annotation) {
    JsonObject object = new JsonObject();
    object.add("typeName", annotation.getAnnotationType() == null ? JsonNull.INSTANCE
            : new JsonPrimitive(new String(annotation.getAnnotationType().constantPoolName())));
    object.add("elementValuePairs", toJsonElementValuePairs(annotation.getElementValuePairs()));
    return object;
}

From source file:com.codenvy.ide.ext.java.server.TypeBindingConvector.java

License:Open Source License

private static JsonElement toJsonElementValuePairs(ElementValuePair[] elementValuePairs) {
    if (elementValuePairs == null)
        return JsonNull.INSTANCE;
    JsonArray array = new JsonArray();
    for (ElementValuePair pair : elementValuePairs) {
        array.add(toJsonElementValuePair(pair));
    }//from w ww. java 2  s  . c o  m
    return array;
}

From source file:com.codenvy.ide.ext.java.server.TypeBindingConvector.java

License:Open Source License

private static JsonElement toJsonElementValuePair(ElementValuePair pair) {
    JsonObject object = new JsonObject();
    object.add("name",
            pair.getName() == null ? JsonNull.INSTANCE : new JsonPrimitive(new String(pair.getName())));
    object.add("value", toJsonDefaultValue(pair.getValue()));
    return object;
}

From source file:com.flipkart.android.proteus.DataContext.java

License:Apache License

@Nullable
public JsonElement get(String dataPath) {
    String aliasedDataPath = getAliasedDataPath(dataPath, reverseScope, true);
    Result result = Utils.readJson(aliasedDataPath, data, index);
    if (result.isSuccess()) {
        return result.element;
    } else if (result.RESULT_CODE == Result.RESULT_JSON_NULL_EXCEPTION) {
        return JsonNull.INSTANCE;
    }/*w w  w . j a va2s . co m*/
    return null;
}

From source file:com.flipkart.android.proteus.toolbox.Utils.java

License:Apache License

public static JsonElement merge(JsonElement oldJson, JsonElement newJson, boolean useCopy, Gson gson) {

    JsonElement newDataElement;//  w  w  w .jav  a 2  s . c o  m
    JsonArray oldArray;
    JsonArray newArray;
    JsonElement oldArrayItem;
    JsonElement newArrayItem;
    JsonObject oldObject;

    if (oldJson == null || oldJson.isJsonNull()) {
        return useCopy ? gson.fromJson(newJson, JsonElement.class) : newJson;
    }

    if (newJson == null || newJson.isJsonNull()) {
        newJson = JsonNull.INSTANCE;
        return newJson;
    }

    if (newJson.isJsonPrimitive()) {
        JsonPrimitive value;
        if (!useCopy) {
            return newJson;
        }
        if (newJson.getAsJsonPrimitive().isBoolean()) {
            value = new JsonPrimitive(newJson.getAsBoolean());
        } else if (newJson.getAsJsonPrimitive().isNumber()) {
            value = new JsonPrimitive(newJson.getAsNumber());
        } else if (newJson.getAsJsonPrimitive().isString()) {
            value = new JsonPrimitive(newJson.getAsString());
        } else {
            value = newJson.getAsJsonPrimitive();
        }
        return value;
    }

    if (newJson.isJsonArray()) {
        if (!oldJson.isJsonArray()) {
            return useCopy ? gson.fromJson(newJson, JsonArray.class) : newJson;
        } else {
            oldArray = oldJson.getAsJsonArray();
            newArray = newJson.getAsJsonArray();

            if (oldArray.size() > newArray.size()) {
                while (oldArray.size() > newArray.size()) {
                    oldArray.remove(oldArray.size() - 1);
                }
            }

            for (int index = 0; index < newArray.size(); index++) {
                if (index < oldArray.size()) {
                    oldArrayItem = oldArray.get(index);
                    newArrayItem = newArray.get(index);
                    oldArray.set(index, merge(oldArrayItem, newArrayItem, useCopy, gson));
                } else {
                    oldArray.add(newArray.get(index));
                }
            }
        }
    } else if (newJson.isJsonObject()) {
        if (!oldJson.isJsonObject()) {
            return useCopy ? gson.fromJson(newJson, JsonObject.class) : newJson;
        } else {
            oldObject = oldJson.getAsJsonObject();
            for (Map.Entry<String, JsonElement> entry : newJson.getAsJsonObject().entrySet()) {
                newDataElement = merge(oldObject.get(entry.getKey()), entry.getValue(), useCopy, gson);
                oldObject.add(entry.getKey(), newDataElement);
            }
        }
    } else {
        return useCopy ? gson.fromJson(newJson, JsonElement.class) : newJson;
    }

    return oldJson;
}

From source file:com.flipkart.android.proteus.view.manager.ProteusViewManagerImpl.java

License:Apache License

private void handleBinding(Binding binding) {
    if (binding.hasRegEx()) {
        layoutBuilder.handleAttribute(layoutHandler, (ProteusView) view, binding.getAttributeKey(),
                new JsonPrimitive(binding.getAttributeValue()));
    } else {//w  ww.ja  v  a2s . co m
        Result result = Utils.readJson(binding.getBindingName(), dataContext.getData(), dataContext.getIndex());
        JsonElement dataValue = result.isSuccess() ? result.element : JsonNull.INSTANCE;
        layoutBuilder.handleAttribute(layoutHandler, (ProteusView) view, binding.getAttributeKey(), dataValue);
    }
}

From source file:com.gilecode.yagson.YaGson.java

License:Apache License

/**
 * This method serializes the specified object into its equivalent Json representation, given that the
 * de-serialization type is known, and writes it to the provided {@link JsonWriter}.
 * <p/>//from ww  w.j a v a 2 s .  co  m
 * The root type information is emitted only if necessary, i.e. if the specified de-serialization type differs from
 * the actual object's class. It is guaranteed that the resulting JSON representation may be de-serialized to the
 * similar object using {@code fromJson(json, deserializationType)}, unless some YaGson's features are disabled.
 *
 * @param src       the object for which JSON representation is to be created
 * @param deserializationType The type which will be used for de-serialization of the resulting JSON representation
 * @param writer    Writer to which the Json representation of src needs to be written.
 * @throws JsonIOException if there was a problem writing to the writer
 * @since 1.2
 */
@Override
public void toJson(Object src, Type deserializationType, JsonWriter writer) throws JsonIOException {
    if (src == null) {
        toJson(JsonNull.INSTANCE, writer);
        return;
    }

    if (src instanceof Number && TypeUtils.isNumberType(deserializationType)
            && TypeUtils.typesDiffer(deserializationType, src.getClass())) {
        // a special case, where a user may rely on auto-cast of primitive number types
        // perform such cast here
        src = TypeUtils.convertNumber((Number) src, deserializationType);
    }

    boolean isRootTypeRequired = TypeUtils.isTypeInfoRequired(src.getClass(), deserializationType, false);

    // use the exact source class for serialization, but try to keep the type parameters if available in
    // the specified deserialization type
    Type parameterizedSrcType = TypeUtils.mergeTypes(src.getClass(), deserializationType);
    super.toJson(src, parameterizedSrcType, writer, isRootTypeRequired);
}

From source file:com.gilecode.yagson.YaGson.java

License:Apache License

/**
 * This method serializes the specified object into its equivalent Json representation as a tree of
 * {@link JsonElement}s, given that the de-serialization type is known.
 * <p/>/* ww  w.j  a v a 2s  . com*/
 * The root type information is emitted only if necessary, i.e. if the specified de-serialization type differs from
 * the actual object's class. It is guaranteed that the resulting string may be de-serialized to the similar object
 * using {@code fromJson(json, deserializationType)}, unless some YaGson's features are disabled.
 *
 * @param src       the object for which JSON representation is to be created
 * @param deserializationType The type which will be used for de-serialization of the resulting JSON representation
 * @return Json representation of {@code src}
 */
@Override
public JsonElement toJsonTree(Object src, Type deserializationType) {
    if (src == null) {
        return JsonNull.INSTANCE;
    }

    boolean isRootTypeRequired = TypeUtils.isTypeInfoRequired(src.getClass(), deserializationType, false);
    JsonTreeWriter writer = new JsonTreeWriter();
    super.toJson(src, src.getClass(), writer, isRootTypeRequired);
    return writer.get();
}

From source file:com.github.jneat.mybatis.JsonElementTypeHandler.java

License:Open Source License

@Override
public JsonElement getNullableResult(ResultSet rs, String columnName) throws SQLException {
    String jsonSource = rs.getString(columnName);
    if (jsonSource != null) {
        return fromString(jsonSource);
    }// w ww .  j  a v  a  2s. c  o  m
    return JsonNull.INSTANCE;
}