1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34 package info.magnolia.ui.contentapp;
35
36 import info.magnolia.ui.framework.ioc.Destructible;
37
38 import java.util.stream.Stream;
39
40 import com.vaadin.data.provider.DataProviderWrapper;
41 import com.vaadin.data.provider.HierarchicalDataProvider;
42 import com.vaadin.data.provider.HierarchicalQuery;
43
44
45
46
47
48
49
50
51
52
53
54 public abstract class HierarchicalDataProviderWrapper<T, F> extends DataProviderWrapper<T, F, F> implements HierarchicalDataProvider<T, F>, Destructible {
55
56 protected HierarchicalDataProviderWrapper(HierarchicalDataProvider<T, F> dataProvider) {
57 super(dataProvider);
58 }
59
60 protected HierarchicalDataProvider<T, F> dataProvider() {
61 return (HierarchicalDataProvider<T, F>) dataProvider;
62 }
63
64 @Override
65 public int getChildCount(HierarchicalQuery<T, F> query) {
66 return dataProvider().getChildCount(new HierarchicalQuery<>(
67 query.getOffset(),
68 query.getLimit(),
69 query.getSortOrders(),
70 query.getInMemorySorting(),
71 getFilter(query),
72 query.getParent()));
73 }
74
75 @Override
76 public Stream<T> fetchChildren(HierarchicalQuery<T, F> query) {
77 return dataProvider.fetch(new HierarchicalQuery<>(
78 query.getOffset(),
79 query.getLimit(),
80 query.getSortOrders(),
81 query.getInMemorySorting(),
82 getFilter(query),
83 query.getParent()));
84 }
85
86 @Override
87 public boolean hasChildren(T item) {
88 return dataProvider().hasChildren(item);
89 }
90
91 @Override
92 public void destroy() {
93 if (dataProvider instanceof Destructible) {
94 ((Destructible) dataProvider).destroy();
95 }
96 }
97 }