Java Frame.checksum方法代码示例

import water.fvec.Frame; //导入方法依赖的package包/类
@Override public S fillFromImpl(ModelMetrics modelMetrics) {
  // If we're copying in a Model we need a ModelSchema of the right class to fill into.
  Model m = modelMetrics.model();
  if( m != null ) {
    this.model = new ModelKeyV3(m._key);
    this.model_category = m._output.getModelCategory();
    this.model_checksum = m.checksum();
  }

  // If we're copying in a Frame we need a Frame Schema of the right class to fill into.
  Frame f = modelMetrics.frame();
  if (null != f) { //true == f.getClass().getSuperclass().getGenericSuperclass() instanceof ParameterizedType
    this.frame = new FrameKeyV3(f._key);
    this.frame_checksum = f.checksum();
  }

  PojoUtils.copyProperties(this, modelMetrics, PojoUtils.FieldNaming.ORIGIN_HAS_UNDERSCORES,
          new String[]{"model", "model_category", "model_checksum", "frame", "frame_checksum"});


  return (S) this;
}
 

import water.fvec.Frame; //导入方法依赖的package包/类
GridSearch start() {
  final int gridSize = _hyperSpaceWalker.getHyperSpaceSize();
  Log.info("Starting gridsearch: estimated size of search space = " + gridSize);
  // Create grid object and lock it
  // Creation is done here, since we would like make sure that after leaving
  // this function the grid object is in DKV and accessible.
  Grid<MP> grid = DKV.getGet(dest());
  if (grid != null) {
    Frame specTrainFrame = _hyperSpaceWalker.getParams().train();
    Frame oldTrainFrame = grid.getTrainingFrame();
    if (!specTrainFrame._key.equals(oldTrainFrame._key) ||
        specTrainFrame.checksum() != oldTrainFrame.checksum()) {
      throw new H2OIllegalArgumentException("training_frame", "grid", "Cannot append new models"
                                            + " to a grid with different training input");
    }
    grid.write_lock(jobKey());
  } else {
    grid =
        new Grid<>(dest(),
                   _hyperSpaceWalker.getParams(),
                   _hyperSpaceWalker.getHyperParamNames(),
                   _modelFactory.getModelName(),
                   _hyperSpaceWalker.getParametersBuilderFactory().getFieldNamingStrategy());
    grid.delete_and_lock(jobKey());
  }
  // Java trick
  final Grid<MP> gridToExpose = grid;
  // Install this as job functions
  start(new H2O.H2OCountedCompleter() {
    @Override
    public void compute2() {
      gridSearch(gridToExpose);
      tryComplete();
    }
  }, gridSize, true);
  return this;
}
 

import water.fvec.Frame; //导入方法依赖的package包/类
public ModelMetrics(Model model, Frame frame, double MSE, String desc) {
  super(buildKey(model, frame));
  _description = desc;
  // Do not cache fields now
  _modelKey = model._key;
  _frameKey = frame._key;
  _model_category = model._output.getModelCategory();
  _model_checksum = model.checksum();
  _frame_checksum = frame.checksum();
  _MSE = MSE;
  _scoring_time = System.currentTimeMillis();
}
 

import water.fvec.Frame; //导入方法依赖的package包/类
public boolean isForFrame(Frame f) { return _frame_checksum == f.checksum(); }