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.ml.math2.ufuncs.executor;
  
  import com.tencent.angel.ml.math2.ufuncs.executor.comp.CompDotExecutor;
  import com.tencent.angel.ml.math2.ufuncs.executor.mixed.MixedDotExecutor;
  import com.tencent.angel.ml.math2.ufuncs.executor.simple.SimpleDotExecutor;
  import com.tencent.angel.ml.math2.vector.ComponentVector;
  import com.tencent.angel.ml.math2.vector.Vector;
  
  public class DotExecutor {
  
    public static double apply(Vector v1, Vector v2) {
      if (v1 instanceof ComponentVector && v2 instanceof ComponentVector) {
        try {
          return CompDotExecutor.apply((ComponentVector) v1, (ComponentVector) v2);
        } catch (Exception e) {
          return CompDotExecutor.apply((ComponentVector) v2, (ComponentVector) v1);
        }
      } else if (v1 instanceof ComponentVector || v2 instanceof ComponentVector) {
        if (v1 instanceof ComponentVector) {
          return MixedDotExecutor.apply((ComponentVector) v1, v2);
        } else {
          return MixedDotExecutor.apply((ComponentVector) v2, v1);
        }
      } else {
        try {
          return SimpleDotExecutor.apply(v1, v2);
        } catch (Exception e) {
          return SimpleDotExecutor.apply(v2, v1);
        }
      }
    }
  }