private Object readDynamicGroup(int size, ByteSource in) throws IOException {
ByteBuf inbuf = (ByteBuf) in;
int expectedEndPos = inbuf.position() + size;
// PENDING: currently msgcodec only supports int32 as group id
int groupId = (int) NativeBlinkInput.readUInt64(inbuf);
inbuf.skip(4); // discard extension offset (not supported)
try {
Object group = readStaticGroup(groupId, inbuf);
int skip = expectedEndPos - inbuf.position();
if (skip < 0) {
throw new DecodeException(
"Malformed dynamic group. Read " + (-skip) + " bytes beyond group size.");
} else if (skip > 0) {
in.skip(skip);
}
return group;
} catch (Exception e) {
GroupDef groupDef = codec.getSchema().getGroup(groupId);
if (groupDef != null) {
throw new GroupDecodeException(groupDef.getName(), e);
} else {
throw e;
}
}
}
@Override
public Object readDynamicGroupNull(ByteSource in) throws IOException {
if (in.read() != 0) {
return readDynamicGroup(in);
} else {
return null;
}
}