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.dam.app.data;
35
36 import info.magnolia.dam.api.AssetProvider;
37 import info.magnolia.dam.api.AssetProviderRegistry;
38 import info.magnolia.dam.api.AssetQuery;
39 import info.magnolia.dam.api.Item;
40 import info.magnolia.ui.filter.DataFilter;
41
42 import java.util.Iterator;
43 import java.util.Optional;
44 import java.util.Spliterators;
45 import java.util.stream.Stream;
46 import java.util.stream.StreamSupport;
47
48 import com.vaadin.data.provider.Query;
49
50 /**
51 * Asset data provider.
52 */
53 public interface AssetDataProvider {
54
55 String MIME_TYPE = "mimeType";
56 String PATH = "path";
57 String ASSET_PROVIDER = "assetProvider";
58
59 default Stream<AssetProvider> getProviders(Query<Item, DataFilter> query, AssetProviderRegistry assetProviderRegistry) {
60 return getStream(assetProviderRegistry.getAllProviders())
61 .filter(assetProvider -> getFilter(query, ASSET_PROVIDER).map(o -> o == assetProvider).orElse(true));
62
63 }
64
65 default AssetQuery.Builder getAssetQueryBuilder(Query<Item, DataFilter> query) {
66 final AssetQuery.Builder builder = new AssetQuery.Builder();
67
68 query.getFilter()
69 .map(DataFilter::getPropertyFilters)
70 .ifPresent(stringObjectMap -> stringObjectMap.forEach((propertyName, propertyValue) -> {
71 switch (propertyName) {
72 case MIME_TYPE:
73 builder.withExtension(String.valueOf(propertyValue));
74 break;
75 case ASSET_PROVIDER: //resolved in info.magnolia.dam.app.data.AssetDataProvider.getProviders
76 case PATH: //resolved in info.magnolia.dam.app.data.AssetListDataProvider.fetchFromBackEnd
77 break;
78 default:
79 if (!"".equals(propertyValue)) { //empty text field filter
80 builder.withProperty(propertyName, propertyValue);
81 }
82 }
83 }));
84
85 return builder;
86 }
87
88 default Optional<Object> getFilter(Query<Item, DataFilter> query, String key) {
89 return query.getFilter()
90 .map(DataFilter::getPropertyFilters)
91 .map(stringObjectMap -> stringObjectMap.get(key));
92 }
93
94 default <T> Stream<T> getStream(Iterator<T> iterator) {
95 return StreamSupport.stream(Spliterators.spliteratorUnknownSize(iterator, 0), false);
96 }
97 }