1 /** 2 * This file Copyright (c) 2019 Magnolia International 3 * Ltd. (http://www.magnolia-cms.com). All rights reserved. 4 * 5 * 6 * This file is dual-licensed under both the Magnolia 7 * Network Agreement and the GNU General Public License. 8 * You may elect to use one or the other of these licenses. 9 * 10 * This file is distributed in the hope that it will be 11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the 12 * implied warranty of MERCHANTABILITY or FITNESS FOR A 13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT. 14 * Redistribution, except as permitted by whichever of the GPL 15 * or MNA you select, is prohibited. 16 * 17 * 1. For the GPL license (GPL), you can redistribute and/or 18 * modify this file under the terms of the GNU General 19 * Public License, Version 3, as published by the Free Software 20 * Foundation. You should have received a copy of the GNU 21 * General Public License, Version 3 along with this program; 22 * if not, write to the Free Software Foundation, Inc., 51 23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 24 * 25 * 2. For the Magnolia Network Agreement (MNA), this file 26 * and the accompanying materials are made available under the 27 * terms of the MNA which accompanies this distribution, and 28 * is available at http://www.magnolia-cms.com/mna.html 29 * 30 * Any modifications to this file must keep this entire header 31 * intact. 32 * 33 */ 34 package info.magnolia.ui.framework.datasource.impl; 35 36 import info.magnolia.ui.contentapp.DataFilter; 37 38 import java.util.Arrays; 39 import java.util.stream.Stream; 40 41 import javax.inject.Inject; 42 43 import com.vaadin.data.provider.AbstractDataProvider; 44 import com.vaadin.data.provider.DataProvider; 45 import com.vaadin.data.provider.Query; 46 47 /** 48 * Enum-based {@link DataProvider} implementation. 49 */ 50 public final class EnumDataProvider<T extends Enum<T>> extends AbstractDataProvider<T, DataFilter> { 51 52 private final EnumDatasourceDefinition<T> definition; 53 54 @Inject 55 public EnumDataProvider(EnumDatasourceDefinition<T> definition) { 56 this.definition = definition; 57 } 58 59 @Override 60 public boolean isInMemory() { 61 return true; 62 } 63 64 @Override 65 public int size(Query<T, DataFilter> query) { 66 return (int) fetch(query).count(); 67 } 68 69 @Override 70 public Stream<T> fetch(Query<T, DataFilter> query) { 71 return Arrays.stream(definition.getEntityType().getEnumConstants()); 72 } 73 }