Support for CharacterEscapes about bson4jackson HOT 6 CLOSED

class MongoCharacterEscapes extends CharacterEscapes {

    public static MongoCharacterEscapes inst = new MongoCharacterEscapes();
    private MongoCharacterEscapes() {}

    @Override
    public int[] getEscapeCodesForAscii() {
        int[] escapes = CharacterEscapes.standardAsciiEscapesForJSON();
        escapes['.'] = CharacterEscapes.ESCAPE_CUSTOM;
        return escapes;
    }

    @Override
    public SerializableString getEscapeSequence(int ch) {
        switch(ch) {
            case '.': return new SerializedString("\uff0e");
        }
        return null;
    }
}

public static void main(String[] args) throws IOException {
    // Without escapes
    testCharacterEscapes(false, false);
    testCharacterEscapes(true,  false);

    // With escapes
    testCharacterEscapes(false, true);
    testCharacterEscapes(true,  true);
}

public static void testCharacterEscapes(boolean useBson, boolean useEscapes) throws IOException {
    // Our test node to be serialized.
    JsonNode node = new ObjectMapper().readTree("{ \"some.field\": \"some.val\" }");

    ObjectMapper mapper = useBson ? new ObjectMapper(new BsonFactory()) :
                                    new ObjectMapper();

    if (useEscapes)
        mapper.getFactory().setCharacterEscapes(MongoCharacterEscapes.inst);

    for (byte b : mapper.writeValueAsBytes(node))
        System.out.printf("%02x ", b);

    System.out.println();
}

                        s  o  m  e  .          f  i  e  l  d                   s  o  m  e  .          v  a  l
// Without escapes
default 7b 22           73 6f 6d 65 2e         66 69 65 6c 64  22 3a 22        73 6f 6d 65 2e         76 61 6c  22 7d 
bson    1e 00 00 00 02  73 6f 6d 65 2e         66 69 65 6c 64  00 09 00 00 00  73 6f 6d 65 2e         76 61 6c  00 00

// With escapes
default 7b 22           73 6f 6d 65 (ef bc 8e) 66 69 65 6c 64  22 3a 22        73 6f 6d 65 (ef bc 8e) 76 61 6c  22 7d 
bson    1e 00 00 00 02  73 6f 6d 65 2e         66 69 65 6c 64  00 09 00 00 00  73 6f 6d 65 2e         76 61 6c  00 00