| /* |
| * 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.composition.boosting; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Path; |
| import java.util.List; |
| import java.util.UUID; |
| import com.fasterxml.jackson.annotation.JsonIgnore; |
| import com.fasterxml.jackson.databind.DeserializationFeature; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.ObjectWriter; |
| import com.fasterxml.jackson.databind.SerializationFeature; |
| import org.apache.ignite.ml.IgniteModel; |
| import org.apache.ignite.ml.composition.ModelsComposition; |
| import org.apache.ignite.ml.composition.predictionsaggregator.WeightedPredictionsAggregator; |
| import org.apache.ignite.ml.inference.json.JSONModel; |
| import org.apache.ignite.ml.inference.json.JSONModelMixIn; |
| import org.apache.ignite.ml.inference.json.JSONWritable; |
| import org.apache.ignite.ml.inference.json.JacksonHelper; |
| import org.apache.ignite.ml.math.functions.IgniteFunction; |
| import org.apache.ignite.ml.math.primitives.vector.Vector; |
| import org.apache.ignite.ml.tree.DecisionTreeModel; |
| |
| /** |
| * GDB model. |
| */ |
| public final class GDBModel extends ModelsComposition<DecisionTreeModel> implements JSONWritable { |
| /** Serial version uid. */ |
| private static final long serialVersionUID = 3476661240155508004L; |
| |
| /** Internal to external lbl mapping. */ |
| @JsonIgnore private IgniteFunction<Double, Double> internalToExternalLblMapping; |
| |
| /** |
| * Creates an instance of GDBModel. |
| * |
| * @param models Models. |
| * @param predictionsAggregator Predictions aggregator. |
| * @param internalToExternalLblMapping Internal to external lbl mapping. |
| */ |
| public GDBModel(List<? extends IgniteModel<Vector, Double>> models, |
| WeightedPredictionsAggregator predictionsAggregator, |
| IgniteFunction<Double, Double> internalToExternalLblMapping) { |
| |
| super((List<DecisionTreeModel>) models, predictionsAggregator); |
| this.internalToExternalLblMapping = internalToExternalLblMapping; |
| } |
| |
| /** */ |
| private GDBModel() { |
| } |
| |
| /** */ |
| public GDBModel withLblMapping(IgniteFunction<Double, Double> internalToExternalLblMapping) { |
| this.internalToExternalLblMapping = internalToExternalLblMapping; |
| return this; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public Double predict(Vector features) { |
| if (internalToExternalLblMapping == null) { |
| throw new IllegalArgumentException("The mapping should not be empty. Initialize it with apropriate function. "); |
| } else { |
| return internalToExternalLblMapping.apply(super.predict(features)); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public void toJSON(Path path) { |
| ObjectMapper mapper = new ObjectMapper().configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false); |
| mapper.addMixIn(GDBModel.class, JSONModelMixIn.class); |
| |
| ObjectWriter writer = mapper |
| .writerFor(GDBModel.class) |
| .withAttribute("formatVersion", JSONModel.JSON_MODEL_FORMAT_VERSION) |
| .withAttribute("timestamp", System.currentTimeMillis()) |
| .withAttribute("uid", "dt_" + UUID.randomUUID().toString()) |
| .withAttribute("modelClass", GDBModel.class.getSimpleName()); |
| |
| try { |
| File file = new File(path.toAbsolutePath().toString()); |
| writer.writeValue(file, this); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| } |
| |
| /** Loads RandomForestModel from JSON file. */ |
| public static GDBModel fromJSON(Path path) { |
| ObjectMapper mapper = new ObjectMapper(); |
| mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); |
| |
| GDBModel mdl; |
| try { |
| JacksonHelper.readAndValidateBasicJsonModelProperties(path, mapper, GDBModel.class.getSimpleName()); |
| mdl = mapper.readValue(new File(path.toAbsolutePath().toString()), GDBModel.class); |
| return mdl; |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } |
| return null; |
| } |
| } |