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1
9 package com.vladium.emma.report;
10
11 import java.io.File  ;
12 import java.io.FileFilter ;
13 import java.util.ArrayList ;
14 import java.util.Collections ;
15 import java.util.HashMap ;
16 import java.util.HashSet ;
17 import java.util.List ;
18 import java.util.Map ;
19 import java.util.Set ;
20
21 import com.vladium.util.asserts.$assert;
22
23
27 public
28 final class SourcePathCache
29 {
30
32
34
37 public SourcePathCache (final String [] sourcepath, final boolean removeNonExistent)
38 {
39 if (sourcepath == null) throw new IllegalArgumentException ("null input: sourcepath");
40
41 final List _sourcepath = new ArrayList (sourcepath.length);
42 for (int i = 0; i < sourcepath.length; ++ i)
43 {
44 final File dir = new File (sourcepath [i]);
45
46 if (! removeNonExistent || (dir.isDirectory () && dir.exists ()))
47 _sourcepath.add (dir);
48 }
49
50 m_sourcepath = new File [_sourcepath.size ()];
51 _sourcepath.toArray (m_sourcepath);
52
53 m_packageCache = new HashMap ();
54 }
55
56
59 public SourcePathCache (final File [] sourcepath, final boolean removeNonExistent)
60 {
61 if (sourcepath == null) throw new IllegalArgumentException ("null input: sourcepath");
62
63 final List _sourcepath = new ArrayList (sourcepath.length);
64 for (int i = 0; i < sourcepath.length; ++ i)
65 {
66 final File dir = sourcepath [i];
67
68 if (! removeNonExistent || (dir.isDirectory () && dir.exists ()))
69 _sourcepath.add (dir);
70 }
71
72 m_sourcepath = new File [_sourcepath.size ()];
73 _sourcepath.toArray (m_sourcepath);
74
75 m_packageCache = new HashMap ();
76 }
77
78
81 public synchronized File find (final String packageVMName, final String name)
82 {
83 if (packageVMName == null) throw new IllegalArgumentException ("null input: packageVMName");
84 if (name == null) throw new IllegalArgumentException ("null input: name");
85
86 if (m_sourcepath.length == 0) return null;
87
88 CacheEntry entry = (CacheEntry) m_packageCache.get (packageVMName);
89
90 if (entry == null)
91 {
92 entry = new CacheEntry (m_sourcepath.length);
93 m_packageCache.put (packageVMName, entry);
94 }
95
96 final Set [] listings = entry.m_listings;
97 for (int p = 0; p < listings.length; ++ p)
98 {
99 Set listing = listings [p];
100 if (listing == null)
101 {
102 listing = faultListing (m_sourcepath [p], packageVMName);
103 listings [p] = listing;
104 }
105
106 if (listing.contains (name))
108 {
109 final File relativeFile = new File (packageVMName.replace ('/', File.separatorChar), name);
110
111 return new File (m_sourcepath [p], relativeFile.getPath ()).getAbsoluteFile ();
112 }
113 }
114
115 return null;
116 }
117
118
120
122
124
125 private static final class CacheEntry
126 {
127 CacheEntry (final int size)
128 {
129 m_listings = new Set [size];
130 }
131
132
133 final Set [] m_listings;
134
135 }
137
138
142 private static final class FileExtensionFilter implements FileFilter
143 {
144 public boolean accept (final File file)
145 {
146 if ($assert.ENABLED) $assert.ASSERT (file != null, "file = null");
147
148 if (file.isDirectory ()) return false;
150 final String name = file.getName ();
151 final int lastDot = name.lastIndexOf ('.');
152 if (lastDot <= 0) return false;
153
154
156 return m_extension.equals (name.substring (lastDot));
158 }
159
160 public String toString ()
161 {
162 return super.toString () + ", extension = [" + m_extension + "]";
163 }
164
165 FileExtensionFilter (final String extension)
166 {
167 if (extension == null)
168 throw new IllegalArgumentException ("null input: extension");
169
170 final String canonical = canonicalizeExtension (extension);
172
173 if (extension.length () <= 1)
174 throw new IllegalArgumentException ("empty input: extension");
175
176 m_extension = canonical;
177 }
178
179 private static String canonicalizeExtension (final String extension)
180 {
181 if (extension.charAt (0) != '.')
182 return ".".concat (extension);
183 else
184 return extension;
185 }
186
187
188 private final String m_extension;
189
190 }
192
193 private Set faultListing (final File dir, final String packageVMName)
194 {
195 if ($assert.ENABLED) $assert.ASSERT (dir != null, "dir = null");
196 if ($assert.ENABLED) $assert.ASSERT (packageVMName != null, "packageVMName = null");
197
198 final File packageFile = new File (dir, packageVMName.replace ('/', File.separatorChar));
199
200 final File [] listing = packageFile.listFiles (FILE_EXTENSION_FILTER);
201
202 if ((listing == null) || (listing.length == 0))
203 return Collections.EMPTY_SET;
204 else
205 {
206 final Set result = new HashSet (listing.length);
207 for (int f = 0; f < listing.length; ++ f)
208 {
209 result.add (listing [f].getName ());
210 }
211
212 return result;
213 }
214 }
215
216
217 private final File [] m_sourcepath; private final Map m_packageCache;
220 private static final FileExtensionFilter FILE_EXTENSION_FILTER;
222 static
223 {
224 FILE_EXTENSION_FILTER = new FileExtensionFilter (".java");
225 }
226
227 } |
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