/* * Copyright (c) [2016-2018] [University of Minnesota] * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package org.grouplens.samantha.server.predictor; import com.fasterxml.jackson.databind.node.ObjectNode; import it.unimi.dsi.fastutil.objects.Object2DoubleMap; import org.grouplens.samantha.server.expander.EntityExpander; import org.grouplens.samantha.server.io.RequestContext; import play.Configuration; import play.inject.Injector; import java.util.ArrayList; import java.util.List; public class FieldBlendingPredictor extends AbstractPredictor { private final List<EntityExpander> entityExpanders; private final Object2DoubleMap<String> defaults; public FieldBlendingPredictor(Configuration config, Configuration daoConfigs, Injector injector, List<EntityExpander> entityExpanders, Object2DoubleMap<String> defaults, String daoConfigKey) { super(config, daoConfigs, daoConfigKey, injector); this.entityExpanders = entityExpanders; this.defaults = defaults; } public List<Prediction> predict(List<ObjectNode> entityList, RequestContext requestContext) { for (EntityExpander expander : entityExpanders) { entityList = expander.expand(entityList, requestContext); } List<Prediction> scoredList = new ArrayList<>(entityList.size()); for (ObjectNode entity : entityList) { double score = 0.0; for (Object2DoubleMap.Entry<String> entry : defaults.object2DoubleEntrySet()) { String key = entry.getKey(); if (entity.has(key)) { score += (entry.getDoubleValue() * entity.get(key).asDouble()); } } scoredList.add(new Prediction(entity, null, score, null)); } return scoredList; } }