CompactObjectInputStream Class — netty Architecture

Source Code

codec-base/src/main/java/io/netty/handler/codec/serialization/CompactObjectInputStream.java lines 25–75

class CompactObjectInputStream extends ObjectInputStream {

    private final ClassResolver classResolver;

    CompactObjectInputStream(InputStream in, ClassResolver classResolver) throws IOException {
        super(in);
        this.classResolver = classResolver;
    }

    @Override
    protected void readStreamHeader() throws IOException {
        int version = readByte() & 0xFF;
        if (version != STREAM_VERSION) {
            throw new StreamCorruptedException(
                    "Unsupported version: " + version);
        }
    }

    @Override
    protected ObjectStreamClass readClassDescriptor()
            throws IOException, ClassNotFoundException {
        int type = read();
        if (type < 0) {
            throw new EOFException();
        }
        switch (type) {
        case CompactObjectOutputStream.TYPE_FAT_DESCRIPTOR:
            return super.readClassDescriptor();
        case CompactObjectOutputStream.TYPE_THIN_DESCRIPTOR:
            String className = readUTF();
            Class<?> clazz = classResolver.resolve(className);
            return ObjectStreamClass.lookupAny(clazz);
        default:
            throw new StreamCorruptedException(
                    "Unexpected class descriptor type: " + type);
        }
    }

    @Override
    protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
        Class<?> clazz;
        try {
            clazz = classResolver.resolve(desc.getName());
        } catch (ClassNotFoundException ignored) {
            clazz = super.resolveClass(desc);
        }

        return clazz;
    }

}