/* * 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.JsonNode; import com.fasterxml.jackson.databind.node.ObjectNode; import org.grouplens.samantha.modeler.common.LearningMethod; import org.grouplens.samantha.modeler.dao.EntityDAO; import org.grouplens.samantha.modeler.featurizer.Featurizer; import org.grouplens.samantha.modeler.common.LearningData; import org.grouplens.samantha.modeler.solver.ObjectiveFunction; import org.grouplens.samantha.server.config.ConfigKey; import org.grouplens.samantha.server.dao.EntityDAOUtilities; import org.grouplens.samantha.server.exception.BadRequestException; import org.grouplens.samantha.server.expander.EntityExpander; import org.grouplens.samantha.server.expander.ExpanderUtilities; import org.grouplens.samantha.server.io.RequestContext; import play.Configuration; import play.inject.Injector; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; public class PredictorUtilities { private PredictorUtilities() {} static public LearningData getLearningData(Featurizer model, RequestContext requestContext, JsonNode daoConfig, Configuration entityDaoConfigs, List<Configuration> expandersConfig, Injector injector, boolean update, List<String> groupKeys, Integer batchSize) { EntityDAO entityDAO = EntityDAOUtilities.getEntityDAO(entityDaoConfigs, requestContext, daoConfig, injector); List<EntityExpander> entityExpanders = ExpanderUtilities.getEntityExpanders(requestContext, expandersConfig, injector); return new SyncFeaturizedLearningData( entityDAO, groupKeys, batchSize, entityExpanders, model, requestContext, update); } static public List<Prediction> predictFromRequest(Predictor predictor, RequestContext requestContext, Injector injector, Configuration daoConfigs, String daoConfigKey) { List<Prediction> predictions = new ArrayList<>(); EntityDAO entityDAO = EntityDAOUtilities.getEntityDAO(daoConfigs, requestContext, requestContext.getRequestBody().get(daoConfigKey), injector); while (entityDAO.hasNextEntity()) { ObjectNode entity = entityDAO.getNextEntity(); List<ObjectNode> entityList = new ArrayList<>(); entityList.add(entity); predictions.addAll(predictor.predict(entityList, requestContext)); } return predictions; } static public LearningMethod getLearningMethod(Configuration config, Injector injector, RequestContext requestContext) { String methodClass = config.getString(ConfigKey.METHOD_CLASS.get()); try { Method method = Class.forName(methodClass) .getMethod("getLearningMethod", Configuration.class, Injector.class, RequestContext.class); return (LearningMethod) method.invoke(null, config, injector, requestContext); } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassNotFoundException e) { throw new BadRequestException(e); } } static public ObjectiveFunction getObjectiveFunction(Configuration config, Injector injector, RequestContext requestContext) { String objectiveClass = config.getString(ConfigKey.OBJECTIVE_CLASS.get()); try { Method method = Class.forName(objectiveClass) .getMethod("getObjectiveFunction", Configuration.class, Injector.class, RequestContext.class); return (ObjectiveFunction) method.invoke(null, config, injector, requestContext); } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException | ClassNotFoundException e) { throw new BadRequestException(e); } } }