sclass CompressToInterpolatedDoubleArray {
  // raw data to compress (integers)
  int[] data;
  
  // output
  InterpolatedDoubleArray result;
  
  // internal
  new IntBuffer indices;
  new DoubleBuffer values;
  
  *(int[] *data) {}
  
  InterpolatedDoubleArray get() {
    ret result = new InterpolatedDoubleArray(indices.toArray(), values.toArray());
  }
}