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1
22 package org.jboss.metadata.spi.scope;
23
24 import java.io.Serializable  ;
25 import java.util.Collection ;
26 import java.util.Collections ;
27 import java.util.Iterator ;
28 import java.util.SortedMap ;
29 import java.util.TreeMap ;
30
31
37 public class ScopeKey implements Serializable , Cloneable
38 {
39
40 private static final long serialVersionUID = -496238095349593371L;
41
42
43 public static ScopeKey DEFAULT_SCOPE = new ScopeKey(new Scope(CommonLevels.JVM, "THIS"));
44
45
46 private SortedMap <ScopeLevel, Scope> scopes = Collections.synchronizedSortedMap(new TreeMap <ScopeLevel, Scope>());
47
48
49 private ScopeLevel maxScopeLevel;
50
51
52 private volatile boolean frozen;
53
54 static
55 {
56 DEFAULT_SCOPE.freeze();
57 }
58
59
62 public ScopeKey()
63 {
64 }
65
66
71 public ScopeKey(Scope scope)
72 {
73 addScope(scope);
74 }
75
76
82 public ScopeKey(ScopeLevel level, String qualifier)
83 {
84 addScope(level, qualifier);
85 }
86
87
92 public ScopeKey(Collection <Scope> scopes)
93 {
94 if (scopes == null)
95 throw new IllegalArgumentException ("Null scopes");
96 for (Scope scope : scopes)
97 addScope(scope);
98 }
99
100
105 public ScopeKey(Scope[] scopes)
106 {
107 if (scopes == null)
108 throw new IllegalArgumentException ("Null scopes");
109 for (Scope scope : scopes)
110 addScope(scope);
111 }
112
113
118 public boolean isFrozen()
119 {
120 return frozen;
121 }
122
123
126 public void freeze()
127 {
128 if (scopes.isEmpty())
129 throw new IllegalStateException ("Attempt to freeze an empty key");
130 this.frozen = true;
131 }
132
133
138 public Collection <Scope> getScopes()
139 {
140 return Collections.unmodifiableCollection(scopes.values());
141 }
142
143
148 public ScopeLevel getMaxScopeLevel()
149 {
150 return maxScopeLevel;
151 }
152
153
158 public ScopeKey getParent()
159 {
160 if (scopes.size() < 2)
161 return null;
162
163 ScopeKey result = new ScopeKey();
164 for (Iterator <Scope> i = scopes.values().iterator(); i.hasNext();)
165 {
166 Scope scope = i.next();
167 if (i.hasNext())
168 result.addScope(scope);
169 }
170 return result;
171 }
172
173 public boolean isParent(ScopeKey key)
174 {
175 if (key.scopes.size() < 2)
177 return false;
178
179 if (scopes.size() != key.scopes.size() - 1)
181 return false;
182
183 Iterator <Scope> thisScopes = scopes.values().iterator();
184 Iterator <Scope> keyScopes = key.scopes.values().iterator();
185
186 while (thisScopes.hasNext())
187 {
188 Scope thisScope = thisScopes.next();
189 Scope keyScope = keyScopes.next();
190 if (thisScope.equals(keyScope) == false)
191 return false;
192 }
193
194 return true;
195 }
196
197
203 public Scope addScope(Scope scope)
204 {
205 if (scope == null)
206 throw new IllegalArgumentException ("Null scope");
207 if (frozen)
208 throw new IllegalStateException ("The scope key is frozen");
209
210 ScopeLevel level = scope.getScopeLevel();
211 Scope result = scopes.put(level, scope);
212 if (maxScopeLevel == null || level.compareTo(maxScopeLevel) >= 0)
213 maxScopeLevel = level;
214 return result;
215 }
216
217
224 public Scope addScope(ScopeLevel level, String qualifier)
225 {
226 Scope scope = new Scope(level, qualifier);
227 return addScope(scope);
228 }
229
230
236 public Scope removeScope(Scope scope)
237 {
238 if (scope == null)
239 throw new IllegalArgumentException ("Null scope");
240
241 return removeScopeLevel(scope.getScopeLevel());
242 }
243
244
250 public Scope getScopeLevel(ScopeLevel scopeLevel)
251 {
252 if (scopeLevel == null)
253 throw new IllegalArgumentException ("Null scope level");
254
255 return scopes.get(scopeLevel);
256 }
257
258
264 public Scope removeScopeLevel(ScopeLevel scopeLevel)
265 {
266 if (scopeLevel == null)
267 throw new IllegalArgumentException ("Null scope level");
268 if (frozen)
269 throw new IllegalStateException ("The scope key is frozen");
270
271 Scope result = scopes.remove(scopeLevel);
272 if (scopeLevel.equals(maxScopeLevel))
273 {
274 maxScopeLevel = null;
275 for (ScopeLevel level : scopes.keySet())
276 maxScopeLevel = level;
277 }
278 return result;
279 }
280
281 public String toString()
282 {
283 return scopes.values().toString();
284 }
285
286 public boolean equals(Object object)
287 {
288 if (object == this)
289 return true;
290 if (object == null || object instanceof ScopeKey == false)
291 return false;
292
293 ScopeKey other = (ScopeKey) object;
294 return scopes.equals(other.scopes);
295 }
296
297 public int hashCode()
298 {
299 return scopes.hashCode();
300 }
301
302 protected ScopeKey clone()
303 {
304 try
305 {
306 return (ScopeKey) super.clone();
307 }
308 catch (CloneNotSupportedException e)
309 {
310 throw new Error (e);
311 }
312 }
313 }
314 |
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