import org.box2d.proto.Box2D.PbBody; //导入依赖的package包/类
@Override
public SerializationResult serialize(Body argBody) {
  PbBody.Builder builder = serializeBody(argBody);
  if (builder == null) {
    return null;
  }
  final PbBody body = builder.build();
  return new SerializationResult() {
    @Override
    public void writeTo(OutputStream argOutputStream) throws IOException {
      body.writeTo(argOutputStream);
    }

    @Override
    public Object getValue() {
      return body;
    }
  };
}
 

import org.box2d.proto.Box2D.PbBody; //导入依赖的package包/类
@Override
public Body deserializeBody(World argWorld, InputStream argInput) throws IOException {
  PbBody body = PbBody.parseFrom(argInput);
  return deserializeBody(argWorld, body);
}
 

import org.box2d.proto.Box2D.PbBody; //导入依赖的package包/类
public PbBody.Builder serializeBody(Body argBody) {
  PbBody.Builder builder = PbBody.newBuilder();
  if (signer != null) {
    Long id = signer.getTag(argBody);
    if (id != null) {
      builder.setTag(id);
    }
  }
  switch (argBody.getType()) {
    case DYNAMIC:
      builder.setType(PbBodyType.DYNAMIC);
      break;
    case KINEMATIC:
      builder.setType(PbBodyType.KINEMATIC);
      break;
    case STATIC:
      builder.setType(PbBodyType.STATIC);
      break;
    default:
      UnsupportedObjectException e = new UnsupportedObjectException("Unknown body type: "
          + argBody.getType(), Type.BODY);
      if (listener == null || listener.isUnsupported(e)) {
        throw e;
      }
      return null;
  }
  builder.setPosition(vecToPb(argBody.getPosition()));
  builder.setAngle(argBody.getAngle());
  builder.setLinearVelocity(vecToPb(argBody.getLinearVelocity()));
  builder.setAngularVelocity(argBody.getAngularVelocity());
  builder.setLinearDamping(argBody.getLinearDamping());
  builder.setAngularDamping(argBody.getAngularDamping());
  builder.setGravityScale(argBody.getGravityScale());

  builder.setBullet(argBody.isBullet());
  builder.setAllowSleep(argBody.isSleepingAllowed());
  builder.setAwake(argBody.isAwake());
  builder.setActive(argBody.isActive());
  builder.setFixedRotation(argBody.isFixedRotation());

  Fixture curr = argBody.m_fixtureList;
  while (curr != null) {
    builder.addFixtures(serializeFixture(curr));
    curr = curr.m_next;
  }

  return builder;
}