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1
20
21 package cpmake;
22
23 import java.io.*;
24 import java.util.*;
25
26 class DependencyCache
27 implements Serializable
28 {
29 private Map m_parsedFileMap;
30
31 private static DependencyCache s_depCache = null;
32 private static String  s_cacheFile;
33
34 private class ParsedFile
37 implements Serializable
38 {
39 private long m_lastParsed;
40 private File m_sourceFile;
41 private Set m_dependencyList;
42 private DependencyParser m_parser;
43
44 private boolean isUpToDate()
45 {
46 return (m_lastParsed > m_sourceFile.lastModified());
47 }
48
49 private void parseFile(CPMake make)
50 throws IOException
51 {
52 String [] list;
53 File file;
54 ParsedFile parsedFile;
55
56 m_dependencyList.clear();
57
58 if (m_parser == null)
59 return;
60
61 CPMake.debugPrint("Parsing file "+m_sourceFile);
62 m_lastParsed = System.currentTimeMillis();
63 list = m_parser.parseFile(m_sourceFile);
64 for (int I = 0; I < list.length; I++)
65 {
66 file = make.locateFile(list[I]);
67
68 if (file != null)
69 {
70 parsedFile = getParsedFile(file);
71
72 m_dependencyList.add(parsedFile);
73 }
74 }
75 }
76
77 public ParsedFile(File source, DependencyParser parser)
79 {
80 m_sourceFile = source;
81 m_parser = parser;
82 m_dependencyList = new HashSet();
83 m_lastParsed = 0;
84 }
85
86 public File getSourceFile()
87 {
88 return (m_sourceFile);
89 }
90
91 public Set getDependencyList(CPMake make)
92 throws IOException
93 {
94 if (!isUpToDate())
95 parseFile(make);
96
97 return (m_dependencyList);
98 }
99
100 public boolean canRecurse()
101 {
102 return (m_parser.canRecurse());
103 }
104
105 public boolean equals(Object obj)
106 {
107 return (m_sourceFile.getAbsolutePath().equals(obj));
108 }
109
110 public int hashCode()
111 {
112 int ret = 0;
113
114 if (m_sourceFile != null)
116 ret = m_sourceFile.getAbsolutePath().hashCode();
117
118 return (ret);
119 }
120
121 public long getParsedTime()
122 {
123 return (m_lastParsed);
124 }
125 }
126
129 private ParsedFile getParsedFile(File source)
130 {
131 ParsedFile parsedFile = (ParsedFile)m_parsedFileMap.get(source.getAbsolutePath());
132
133 if (parsedFile == null)
134 {
135 parsedFile = new ParsedFile(source, getDependencyParser(source.getName()));
136 m_parsedFileMap.put(parsedFile.getSourceFile().getAbsolutePath(), parsedFile);
137 }
138
139 return (parsedFile);
140 }
141
142 private DependencyParser getDependencyParser(String file)
143 {
144 if (file.matches(".*\\.c") || file.matches(".*\\.cpp") ||
145 file.matches(".*\\.h") || file.matches(".*\\.hpp"))
146 return (new CDependencyParser());
147 else if (file.matches(".*\\.class"))
148 {
149 return (new JavaDependencyParser());
150 }
151 else
152 return (null);
153 }
154
155 private void getDependencies(Set retSet, CPMake make, ParsedFile parsedFile)
156 throws IOException
157 {
158 Set dependencies = parsedFile.getDependencyList(make);
159 Iterator it = dependencies.iterator();
160 ParsedFile pfile;
161
162 while (it.hasNext())
163 {
164 pfile = (ParsedFile)it.next();
165
166 if ((retSet.add(make.getPath(pfile.getSourceFile()))) && (parsedFile.canRecurse()))
167 getDependencies(retSet, make, pfile);
168 }
169 }
170
171 private DependencyCache()
173 {
174 m_parsedFileMap = new HashMap();
175 }
176
177 public boolean canParse(String file)
178 {
179 return (getDependencyParser(file) != null);
180 }
181
182 public Set getDependencies(CPMake make, String file)
183 throws CPMakeException
184 {
185 File srcFile = make.locateFile(file);
186 ParsedFile parsedFile;
187 DependencyParser parser = null;
188 Set dependencies = new HashSet();
189
190 CPMake.debugPrint("Dependency lookup for "+file);
191
192 if (srcFile != null)
193 {
194 parsedFile = getParsedFile(srcFile);
195
196 try
197 {
198 getDependencies(dependencies, make, parsedFile);
199 }
200 catch (IOException ioe)
201 {
202 throw (new CPMakeException("Dependency error\n"+ioe.getMessage(), -1));
203 }
204 }
205
206 return (dependencies);
207 }
208
209 public static void writeDependencyCache()
211 throws IOException
212 {
213 FileOutputStream fos = new FileOutputStream(s_cacheFile);
214 ObjectOutputStream oos = new ObjectOutputStream(fos);
215
216 oos.writeObject(s_depCache);
217
218 oos.close();
219 }
220
221 public static DependencyCache getDependencyCache(String cacheFile)
222 {
223 try
224 {
225 if (s_depCache == null)
226 {
227 s_cacheFile = cacheFile;
228 readDependencyCache(cacheFile);
229
237 }
238 }
239 catch (Exception ioe)
240 {
241 CPMake.debugPrint(ioe.getMessage());
242 StringWriter sw = new StringWriter();
243 ioe.printStackTrace(new PrintWriter(sw));
244 CPMake.debugPrint(sw.toString());
245 s_depCache = new DependencyCache();
246 }
247
248 return (s_depCache);
249 }
250
251 public static String getCacheFile()
252 {
253 return (s_cacheFile);
254 }
255
256 private static void readDependencyCache(String cacheFile)
257 throws IOException, ClassNotFoundException
258 {
259 FileInputStream fis = new FileInputStream(cacheFile);
260 ObjectInputStream ois = new ObjectInputStream(fis);
261
262 s_depCache = (DependencyCache)ois.readObject();
263
264 ois.close();
265 }
266 }
267
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Java API By Example, From Geeks To Geeks.