Java tutorial
// PartManager.java --- Manager that handles operations involving Part nodes. // Copyright (C) 2013-2015 Tim Krones // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU Affero General Public License as published // by the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Affero General Public License for more details. // You should have received a copy of the GNU Affero General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. package managers.nodes; import com.fasterxml.jackson.databind.JsonNode; import constants.NodeType; import java.util.ArrayList; import java.util.List; import models.nodes.Part; import play.libs.F.Function; import play.libs.F.Promise; public class PartManager extends ContentNodeManager { public PartManager() { this.label = NodeType.PART.toString(); } // READ public Promise<List<Part>> all() { Promise<List<JsonNode>> json = all(this.label); return json.map(new Function<List<JsonNode>, List<Part>>() { public List<Part> apply(List<JsonNode> json) { List<Part> parts = new ArrayList<Part>(); for (JsonNode node : json) { String content = node.get("content").asText(); parts.add(new Part(content)); } return parts; } }); } }