private static <T> StreamingDeserializer<T> newDeserializer(ObjectReader reader) {
    final JsonFactory factory = reader.getFactory();
    final JsonParser parser;
    try {
        // TODO(scott): ByteBufferFeeder is currently not supported by jackson, and the current API throws
        // UnsupportedOperationException if not supported. When jackson does support two NonBlockingInputFeeder
        // types we need an approach which doesn't involve catching UnsupportedOperationException to try to get
        // ByteBufferFeeder and then ByteArrayFeeder.
        parser = factory.createNonBlockingByteArrayParser();
    } catch (IOException e) {
        throw new IllegalArgumentException("parser initialization error for factory: " + factory, e);
    }
    NonBlockingInputFeeder rawFeeder = parser.getNonBlockingInputFeeder();
    if (rawFeeder instanceof ByteBufferFeeder) {
        return new ByteBufferJacksonDeserializer<>(reader, parser, (ByteBufferFeeder) rawFeeder);
    }
    if (rawFeeder instanceof ByteArrayFeeder) {
        return new ByteArrayJacksonDeserializer<>(reader, parser, (ByteArrayFeeder) rawFeeder);
    }
    throw new IllegalArgumentException("unsupported feeder type: " + rawFeeder);
}
 

private Jackson2Tokenizer(
		JsonParser parser, DeserializationContext deserializationContext, boolean tokenizeArrayElements) {

	this.parser = parser;
	this.deserializationContext = deserializationContext;
	this.tokenizeArrayElements = tokenizeArrayElements;
	this.tokenBuffer = new TokenBuffer(parser, deserializationContext);
	this.inputFeeder = (ByteArrayFeeder) this.parser.getNonBlockingInputFeeder();
}
 

private Jackson2Tokenizer(JsonParser parser, boolean tokenizeArrayElements) {
	Assert.notNull(parser, "'parser' must not be null");

	this.parser = parser;
	this.tokenizeArrayElements = tokenizeArrayElements;
	this.tokenBuffer = new TokenBuffer(parser);
	this.inputFeeder = (ByteArrayFeeder) this.parser.getNonBlockingInputFeeder();
}
 

ByteArrayJacksonDeserializer(ObjectReader reader, JsonParser parser, ByteArrayFeeder feeder) {
    super(reader, parser);
    this.feeder = feeder;
}
 

@Override
public ByteArrayFeeder getNonBlockingInputFeeder() {
    return this;
}