1 /**
2 * This file Copyright (c) 2018 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.contentapp;
35
36 import info.magnolia.ui.filter.DataFilter;
37
38 import java.util.stream.Stream;
39
40 import com.vaadin.data.provider.HierarchicalDataProvider;
41 import com.vaadin.data.provider.HierarchicalQuery;
42 import com.vaadin.data.provider.Query;
43
44 /**
45 * Filterable wrapper for a data provider of the specified type.
46 * @param <T> item type.
47 */
48 public class FilterableHierarchicalDataProvider<T> extends HierarchicalDataProviderWrapper<T, DataFilter> implements FilterableDataProvider<T> {
49
50 public static <T> FilterableHierarchicalDataProvider<T> wrap(HierarchicalDataProvider<T, DataFilter> src) {
51 return new FilterableHierarchicalDataProvider<>(src);
52 }
53
54 private FilterableHierarchicalDataProvider(HierarchicalDataProvider<T, DataFilter> dataProvider) {
55 super(dataProvider);
56 }
57
58 private DataFilter filter;
59
60 @Override
61 public void setDataFilter(DataFilter dataFilter) {
62 this.filter = dataFilter;
63 }
64
65 @Override
66 public Stream<T> fetch(Query<T, DataFilter> t) {
67 return dataProvider.fetch(new HierarchicalQuery<>(t.getOffset(), t.getLimit(),
68 t.getSortOrders(), t.getInMemorySorting(), getFilter(t), null));
69 }
70
71 @Override
72 public Stream<T> fetchChildren(HierarchicalQuery<T, DataFilter> query) {
73 return super.fetchChildren(query)
74 .sorted(getComparator(query));
75 }
76
77 @Override
78 public DataFilter getFilter(Query<T, DataFilter> query) {
79 return filter;
80 }
81
82 @Override
83 public boolean hasChildren(T item) {
84 return fetchChildren(new HierarchicalQuery<>(filter, item)).count() > 0;
85 }
86 }