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1
9 package org.jboss.portal.server.plugins.preferences;
10
11 import java.util.HashSet  ;
12 import java.util.Set ;
13
14 import org.apache.log4j.Logger;
15
16
20 public class SimpleMergeStrategy implements MergeStrategy
21 {
22
23
24 private static Logger log = Logger.getLogger(SimpleMergeStrategy.class);
25
26
27 private static final SimpleMergeStrategy singleton = new SimpleMergeStrategy();
28
29 public static SimpleMergeStrategy getSingleton()
30 {
31 return singleton;
32 }
33
34 public Preference getPreference(PreferenceSet[] sets, String key) throws IllegalArgumentException
35 {
36 if (sets == null)
38 {
39 throw new IllegalArgumentException ("sets must not be null");
40 }
41 if (key == null)
42 {
43 throw new IllegalArgumentException ("key must not be null");
44 }
45
46 Preference preference = null;
48
49 for (int i = sets.length - 1;i >= 0;i--)
51 {
52 Preference tmp = sets[i].getPreference(key);
53 if (tmp != null)
54 {
55 if (tmp.isReadOnly())
56 {
57 preference = tmp;
58 break;
59 }
60 else if (preference == null)
61 {
62 preference = tmp;
63 }
64 }
65 }
66
67 return preference;
68 }
69
70 public boolean isReadOnly(PreferenceSet[] sets, String key) throws IllegalArgumentException
71 {
72 if (sets == null)
74 {
75 throw new IllegalArgumentException ("sets must not be null");
76 }
77 if (key == null)
78 {
79 throw new IllegalArgumentException ("key must not be null");
80 }
81
82 for (int i = sets.length - 1;i >= 0;i--)
84 {
85 Preference preference = sets[i].getPreference(key);
86 if (preference != null && preference.isReadOnly())
87 {
88 return true;
89 }
90 }
91
92 return false;
94 }
95
96 public Set getKeySet(PreferenceSet[] sets) throws IllegalArgumentException
97 {
98 if (sets == null)
100 {
101 throw new IllegalArgumentException ("sets must not be null");
102 }
103
104 Set keys = new HashSet ();
106 for (int i = 0;i < sets.length;i++)
107 {
108 Set tmp = sets[i].keySet();
109 keys.addAll(tmp);
110 }
111 return keys;
112 }
113 }
114 |
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