content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * https://opensource.org/licenses/Apache-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License
   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
   * or implied. See the License for the specific language governing permissions and limitations under
   * the License.
   *
   */
  package com.tencent.angel.sona.tree.objective.metric;
  
  public interface EvalMetric {
      Kind getKind();
  
      double eval(float[] preds, float[] labels);
  
      double eval(float[] preds, float[] labels, int start, int end);
  
      public enum Kind {
          RMSE("rmse"),
          ERROR("error"),
          LOG_LOSS("log-loss"),
          CROSS_ENTROPY("cross-entropy"),
          PRECISION("precision"),
          AUC("auc");
  
          private final String kind;
  
          private Kind(String kind) {
              this.kind = kind;
          }
  
          @Override
          public String toString() {
              return kind;
          }
      }
  }
  