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1
9 package org.jboss.portal.common.util;
10
11 import java.util.Iterator  ;
12 import java.util.Comparator ;
13 import java.util.List ;
14 import java.util.ArrayList ;
15 import java.util.SortedSet ;
16 import java.util.TreeSet ;
17 import java.util.Collections ;
18 import java.util.Enumeration ;
19 import java.util.jar.JarInputStream ;
20 import java.util.jar.JarEntry ;
21 import java.util.jar.JarFile ;
22 import java.io.IOException ;
23 import java.net.URL ;
24 import java.net.MalformedURLException ;
25
26
30 public class Jar
31 {
32
33
36 private static final Comparator comparator = new Comparator ()
37 {
38 public int compare(Object o1, Object o2)
39 {
40 EntryInfo e1 = (EntryInfo)o1;
41 EntryInfo e2 = (EntryInfo)o2;
42 Iterator i1 = e1.iterator();
43 Iterator i2 = e2.iterator();
44 while (true)
45 {
46 if (i1.hasNext())
47 {
48 Object o = i1.next();
49 String s1 = (String )o;
50 if (i2.hasNext())
51 {
52 String s2 = (String )i2.next();
53 int res = s1.compareTo(s2);
54 if (res != 0)
55 {
56 return res;
57 }
58 }
59 else
60 {
61 return 1;
62 }
63 }
64 else
65 {
66 if (i2.hasNext())
67 {
68 return -1;
69 }
70 else
71 {
72 return 0;
73 }
74 }
75 }
76 }
77 };
78
79 public static Iterator iterator(JarFile file) throws IOException , IllegalArgumentException
80 {
81 if (file == null)
82 {
83 throw new IllegalArgumentException ();
84 }
85 SortedSet set = new TreeSet (comparator);
86 for (Enumeration e = file.entries();e.hasMoreElements();)
87 {
88 JarEntry entry = (JarEntry )e.nextElement();
89 EntryInfo info = new EntryInfo(entry);
90 set.add(info);
91 }
92 return set.iterator();
93 }
94
95 public static Iterator iterator(JarInputStream in) throws IOException , IllegalArgumentException
96 {
97 if (in == null)
98 {
99 throw new IllegalArgumentException ();
100 }
101 SortedSet set = new TreeSet (comparator);
102 for (JarEntry entry = in.getNextJarEntry();entry !=null;entry = in.getNextJarEntry())
103 {
104 Jar.EntryInfo info = new EntryInfo(entry);
105 set.add(info);
106 }
107 return set.iterator();
108 }
109
110
113 public static class EntryInfo
114 {
115
116 private final JarEntry entry;
117 private final List atoms;
118
119 public EntryInfo(JarEntry entry)
120 {
121 if (entry == null)
122 {
123 throw new IllegalArgumentException ();
124 }
125 this.entry = entry;
126 String name = entry.getName();
127 ArrayList atoms = new ArrayList ();
128 int previous = -1;
129 while (true)
130 {
131 int current = name.indexOf('/', previous + 1);
132 if (current == -1)
133 {
134 current = name.length();
135 }
136 if (current >= name.length() - 1)
137 {
138 if (current - previous > 1)
139 {
140 atoms.add(name.substring(previous + 1, current));
141 }
142 break;
143 }
144 if (current - previous > 1)
145 {
146 atoms.add(name.substring(previous + 1, current));
147 }
148 previous = current;
149 }
150 this.atoms = Collections.unmodifiableList(atoms);
151 }
152
153 public Iterator iterator()
154 {
155 return atoms.iterator();
156 }
157
158 public JarEntry getEntry()
159 {
160 return entry;
161 }
162
163 public boolean isDirectory()
164 {
165 return entry.isDirectory();
166 }
167
168 public int size()
169 {
170 return atoms.size();
171 }
172
173 public List getAtoms()
174 {
175 return atoms;
176 }
177
178 public String get(int index)
179 {
180 return (String )atoms.get(index);
181 }
182
183 public boolean isChildOf(EntryInfo parent) throws IllegalArgumentException
184 {
185 if (parent == null)
186 {
187 throw new IllegalArgumentException ();
188 }
189 if (!parent.isDirectory())
190 {
191 return false;
192 }
193 if (parent.size() + 1 != atoms.size())
194 {
195 return false;
196 }
197 return parent.atoms.equals(parent.atoms.subList(0, atoms.size() - 1));
198 }
199
200 public boolean isDescendantOf(EntryInfo ancestor) throws IllegalArgumentException
201 {
202 if (ancestor == null)
203 {
204 throw new IllegalArgumentException ();
205 }
206 if (!ancestor.isDirectory())
207 {
208 return false;
209 }
210 if (ancestor.size() >= atoms.size())
211 {
212 return false;
213 }
214 return ancestor.atoms.equals(atoms.subList(0, ancestor.size()));
215 }
216
217 public URL toURL(URL jarURL) throws IllegalArgumentException , IllegalStateException , MalformedURLException
218 {
219 if (jarURL == null)
220 {
221 throw new IllegalArgumentException ("No null jarURL");
222 }
223 if (isDirectory())
224 {
225 throw new IllegalStateException ("Cannot create dir URL");
226 }
227 StringBuffer tmp = new StringBuffer (jarURL.toString()).append("!/");
228 for (int i = 0; i < atoms.size(); i++)
229 {
230 String atom = (String )atoms.get(i);
231 tmp.append(i > 0 ? "/" : "").append(atom);
232 }
233 return new URL ("jar", "", tmp.toString());
234 }
235
236 public String toString()
237 {
238 StringBuffer tmp = new StringBuffer ();
239 for (int i = 0; i < atoms.size(); i++)
240 {
241 String atom = (String )atoms.get(i);
242 tmp.append(i > 0 ? "/" : "").append(atom);
243 }
244 if (entry.isDirectory())
245 {
246 tmp.append("/");
247 }
248 return tmp.toString();
249 }
250 }
251
252
253
254 }
255 |
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