Java JsonValue.NULL屬性代碼示例

/**
 * Converts an example of the given type to a JSON value.
 *
 * @param type
 *            RAML type declaration
 * @param example
 *            example instance
 * @return JSON value
 */
public JsonValue toJsonValue(TypeDeclaration type, ExampleSpec example) {
    TypeInstance instance = example.structuredValue();
    if (instance == null) {
        return JsonValue.NULL;
    }
    JsonObjectBuilder builder = createObject(instance);
    JsonObject jsonObject = builder.build();
    if (isArray(type)) {
        return jsonObject.entrySet().iterator().next().getValue();
    }
    if (!isObject(type) && jsonObject.containsKey("value")) {
        return jsonObject.get("value");
    }
    return jsonObject;
}
 

@Override
public JsonValue deserialize(JsonParser parser, DeserializationContext ctx, Type rtType) {
    final JsonParser.Event next = ((JsonbRiParser)parser).getLastEvent();
    switch (next) {
        case VALUE_TRUE:
            return JsonValue.TRUE;
        case VALUE_FALSE:
            return JsonValue.FALSE;
        case VALUE_NULL:
            return JsonValue.NULL;
        case VALUE_STRING:
        case VALUE_NUMBER:
            return parser.getValue();
        default:
            throw new JsonbException(Messages.getMessage(MessageKeys.INTERNAL_ERROR, "Unknown JSON value: "+next));
    }
}
 

@Override
public JsonValue getValue ()
{
	switch (m_event)
	{
		case START_ARRAY:
		case START_OBJECT:
			return Utils.getStructure (this);
		case END_ARRAY:
		case END_OBJECT:
		case KEY_NAME:
			throw stateError ("getValue()");
		case VALUE_TRUE:
			return JsonValue.TRUE;
		case VALUE_FALSE:
			return JsonValue.FALSE;
		case VALUE_NULL:
			return JsonValue.NULL;
		case VALUE_NUMBER:
			return new CookJsonBigDecimal (getBigDecimal ());
		case VALUE_STRING:
			return new CookJsonString (getString ());
	}
	throw stateError ("getValue()");
}
 

public Fact(final JsonObject o, final Context cx) {
	createdAt = cx.parseTimeJS(o.getString("createdAt"));
	key = o.getString("key");
	prototype = null;
	
	final JsonValue pv = o.get("previousVersion");
	
	previousVersion = (pv == null || pv == JsonValue.NULL) 
		? null 
		: new Fact(o.getJsonObject("previousVersion"), cx);
	
	final JsonValue vv = o.get("version");
	version = (vv == null) ? 1 : o.getInt("version");
}
 

@Override
public JsonValue getValue ()
{
	if (m_event == null)
		throw new IllegalStateException ();
	switch (m_event)
	{
		case START_ARRAY:
		case START_OBJECT:
			return Utils.getStructure (this);
		case VALUE_STRING:
		{
			if (m_value instanceof byte[])
			{
				CookJsonBinary v = new CookJsonBinary ((byte[]) m_value);
				v.setBinaryFormat (m_binaryFormat);
				return v;
			}
			return new CookJsonString ((String) m_value);
		}
		case VALUE_NUMBER:
		{
			if (m_value instanceof Integer)
				return new CookJsonInt ((Integer)m_value);
			if (m_value instanceof Long)
				return new CookJsonLong ((Long)m_value);
			return new CookJsonDouble ((Double) m_value);
		}
		case VALUE_NULL:
			return JsonValue.NULL;
		case VALUE_TRUE:
			return JsonValue.TRUE;
		case VALUE_FALSE:
			return JsonValue.FALSE;
		default:
			throw new IllegalStateException ();
	}
}
 

private static String safeJsonToString(JsonObject m, String key) {
    return m.get(key) == JsonValue.NULL ? null : m.getString(key);
}
 

private static JsonValue safeStringToJson(String s) {
    return (s == null) ? JsonValue.NULL : Json.createObjectBuilder().add("temp", s).build().getJsonString("temp");
}
 

/**
 * Create a {@link JsonValue{ of a String, handling nulls
 * <p>
 * @param s String
 * <p>
 * @return JsonValue
 */
public static JsonValue createJsonValue( final String s )
{
    return s == null ? JsonValue.NULL : createJsonString( s );
}
 

/**
 * Convert a {@link LocalDate} to Json handling nulls
 * <p>
 * @param d date
 * <p>
 * @return JsonValue
 */
public static JsonValue toJson( LocalDate d )
{
    return d == null ? JsonValue.NULL : JsonUtils.createJsonString( d.toString() );
}