| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 |
| * |
| * http://www.apache.org/licenses/LICENSE-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 org.apache.ignite.ml.selection.paramgrid; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.ignite.ml.math.functions.IgniteDoubleConsumer; |
| |
| /** |
| * Keeps the grid of parameters. |
| */ |
| public class ParamGrid implements Serializable { |
| /** Parameter values by parameter index. */ |
| private Map<Integer, Double[]> paramValuesByParamIdx = new HashMap<>(); |
| |
| /** Parameter names by parameter index. */ |
| private Map<Integer, IgniteDoubleConsumer> settersByParamIdx = new HashMap<>(); |
| |
| /** Parameter names by parameter index. */ |
| private Map<Integer, String> paramNamesByParamIdx = new HashMap<>(); |
| |
| /** Parameter counter. */ |
| private int paramCntr; |
| |
| /** Parameter search strategy. */ |
| private HyperParameterTuningStrategy paramSearchStgy = new BruteForceStrategy(); |
| |
| /** */ |
| public Map<Integer, Double[]> getParamValuesByParamIdx() { |
| return Collections.unmodifiableMap(paramValuesByParamIdx); |
| } |
| |
| /** |
| * Adds a grid for the specific hyper parameter. |
| * @param paramName The parameter name. |
| * @param setter The method reference to trainer or preprocessor trainer setter. |
| * @param params The array of the given hyper parameter values. |
| * @return The updated ParamGrid. |
| */ |
| public ParamGrid addHyperParam(String paramName, IgniteDoubleConsumer setter, Double[] params) { |
| paramValuesByParamIdx.put(paramCntr, params); |
| paramNamesByParamIdx.put(paramCntr, paramName); |
| settersByParamIdx.put(paramCntr, setter); |
| paramCntr++; |
| return this; |
| } |
| |
| /** |
| * Set up the hyper-parameter searching strategy. |
| * |
| * @param paramSearchStgy Parameter search strategy. |
| */ |
| public ParamGrid withParameterSearchStrategy(HyperParameterTuningStrategy paramSearchStgy) { |
| this.paramSearchStgy = paramSearchStgy; |
| return this; |
| } |
| |
| |
| /** Returns the Hyper-parameter tuning strategy. */ |
| public HyperParameterTuningStrategy getHyperParameterTuningStrategy() { |
| return paramSearchStgy; |
| } |
| |
| /** Returns setter for parameter with the given index. */ |
| public IgniteDoubleConsumer getSetterByIndex(int idx) { |
| return settersByParamIdx.get(idx); |
| } |
| |
| /** Returns the name of hyper-parameter by the given index. */ |
| public String getParamNameByIndex(int idx) { |
| return paramNamesByParamIdx.get(idx); |
| } |
| |
| /** |
| * Prepare data for hyper-parameter tuning. |
| */ |
| public List<Double[]> getParamRawData() { |
| List<Double[]> res = new ArrayList<>(); |
| paramValuesByParamIdx.forEach(res::add); |
| return res; |
| } |
| } |