/* * 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.ranker; import com.fasterxml.jackson.databind.JsonNode; import org.grouplens.samantha.server.common.JsonHelpers; import org.grouplens.samantha.server.config.ConfigKey; import org.grouplens.samantha.server.io.RequestContext; import play.Configuration; import play.inject.Injector; public class EntityFieldRankerConfig implements RankerConfig { private final int pageSize; private final String orderField; private final boolean whetherOrder; private final boolean ascending; private final Configuration config; private final Injector injector; private EntityFieldRankerConfig(Configuration config, Injector injector, int pageSize, String orderField, boolean whetherOrder, boolean ascending) { this.pageSize = pageSize; this.injector = injector; this.orderField = orderField; this.whetherOrder = whetherOrder; this.ascending = ascending; this.config = config; } public static RankerConfig getRankerConfig(Configuration rankerConfig, Injector injector) { int pageSize = 24; if (rankerConfig.asMap().containsKey(ConfigKey.RANKER_PAGE_SIZE.get())) { pageSize = rankerConfig.getInt(ConfigKey.RANKER_PAGE_SIZE.get()); } boolean whetherOrder = true; if (rankerConfig.asMap().containsKey("whetherOrder")) { whetherOrder = rankerConfig.getBoolean("whetherOrder"); } Boolean ascending = rankerConfig.getBoolean("ascending"); if (ascending == null) { ascending = false; } return new EntityFieldRankerConfig(rankerConfig, injector, pageSize, rankerConfig.getString("orderField"), whetherOrder, ascending); } public Ranker getRanker(RequestContext requestContext) { JsonNode requestBody = requestContext.getRequestBody(); int page = JsonHelpers.getOptionalInt(requestBody, ConfigKey.RANKER_PAGE.get(), 1); int offset = JsonHelpers.getOptionalInt(requestBody, ConfigKey.RANKER_OFFSET.get(), (page - 1) * pageSize); int limit = JsonHelpers.getOptionalInt(requestBody, ConfigKey.RANKER_LIMIT.get(), pageSize); return new EntityFieldRanker(config, requestContext, injector, offset, limit, pageSize, whetherOrder, orderField, ascending); } }