1 | /** |
2 | * Copyright 2005-2011 Steve McDuff d-duff@users.sourceforge.net |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | */ |
16 | package org.deduced.viewer.web.server; |
17 | |
18 | import java.util.HashMap; |
19 | import java.util.Map; |
20 | |
21 | import org.deduced.AbstractPropertyCollection; |
22 | import org.deduced.PropertyCollection; |
23 | import org.deduced.RecursiveModelListener; |
24 | |
25 | /** |
26 | * PropertyCollectionIndex is used to monitor an object tree and index all the |
27 | * property collection it contains to find them for future reference. |
28 | * |
29 | * @author Steve McDuff |
30 | * |
31 | */ |
32 | public class PropertyCollectionIndex extends RecursiveModelListener |
33 | { |
34 | |
35 | /** |
36 | * index of the property collections where the key is the unique ID of the |
37 | * collection. |
38 | */ |
39 | private Map<Object, PropertyCollection<?, ?>> index = |
40 | new HashMap<Object, PropertyCollection<?, ?>>(); |
41 | |
42 | /** |
43 | * PropertyCollectionIndex constructor |
44 | */ |
45 | public PropertyCollectionIndex() |
46 | { |
47 | |
48 | } |
49 | |
50 | /** |
51 | * get a Collection based on it's unique ID |
52 | * |
53 | * @param key the collection unique ID |
54 | * @return the matching collection. Null if this ID is unknown |
55 | */ |
56 | public PropertyCollection<?, ?> getCollection( |
57 | Object key) |
58 | { |
59 | return index.get(key); |
60 | } |
61 | |
62 | /** |
63 | * (non-JSDoc) |
64 | * |
65 | * @see org.deduced.RecursiveModelListener#addAllListeners(org.deduced.PropertyCollection) |
66 | */ |
67 | @Override |
68 | protected void addAllListeners( |
69 | PropertyCollection<?, ?> currentCollection) |
70 | { |
71 | Object key = |
72 | AbstractPropertyCollection |
73 | .getInstanceIdentityKey(currentCollection); |
74 | index.put(key, currentCollection); |
75 | super.addAllListeners(currentCollection); |
76 | } |
77 | |
78 | /** |
79 | * (non-JSDoc) |
80 | * |
81 | * @see org.deduced.RecursiveModelListener#removeAllListeners(org.deduced.PropertyCollection) |
82 | */ |
83 | @Override |
84 | protected void removeAllListeners( |
85 | PropertyCollection<?, ?> currentCollection) |
86 | { |
87 | Object key = |
88 | AbstractPropertyCollection |
89 | .getInstanceIdentityKey(currentCollection); |
90 | index.remove(key); |
91 | super.removeAllListeners(currentCollection); |
92 | } |
93 | |
94 | } |