Protected Member Functions | |
| Class | findClass (String className) throws ClassNotFoundException |
| URL | findResource (String name) |
Package Functions | |
| DriverClassLoader (ClassLoader parent, File pPath) | |
Definition at line 57 of file DriverClassLoader.java.
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Creates a new
Definition at line 69 of file DriverClassLoader.java. 00070 {
00071 super(parent);
00072 path = pPath;
00073 if (path == null)
00074 path = new File("");
00075
00076 }
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finds the specified class
Definition at line 83 of file DriverClassLoader.java. 00084 {
00085
00086 FileInputStream fis = null;
00087
00088 try
00089 {
00090 byte[] classBytes = null;
00091
00092 // first we try to locate a class file.
00093 String pathName = className.replace('.', File.separatorChar);
00094 File file = new File(path.getAbsolutePath(), pathName + ".class");
00095 if (file.exists())
00096 {
00097 // we have found a class file and read it
00098 fis = new FileInputStream(file);
00099 classBytes = new byte[fis.available()];
00100 fis.read(classBytes);
00101 }
00102 else
00103 {
00104 // no class file exists we have to check jar files
00105 classBytes = findClassInJarFile(path, className);
00106 }
00107
00108 // we convert the bytes into the specified class
00109 Class clazz = defineClass(null, classBytes, 0, classBytes.length);
00110 return clazz;
00111 }
00112 catch (Exception e)
00113 {
00114 // We could not find the class, so indicate the problem with an exception
00115 throw new ClassNotFoundException(className, e);
00116 }
00117 finally
00118 {
00119 if (null != fis)
00120 {
00121 try
00122 {
00123 fis.close();
00124 }
00125 catch (Exception e)
00126 {
00127 }
00128 }
00129 }
00130 }
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Definition at line 207 of file DriverClassLoader.java. 00208 {
00209
00210 // we try to locate the resource unjarred
00211 if (path.isDirectory())
00212 {
00213 File searchResource = new File(path, name);
00214 if (searchResource.exists())
00215 {
00216 try
00217 {
00218 return searchResource.toURL();
00219 }
00220 catch (MalformedURLException mfe)
00221 {
00222 }
00223 }
00224 }
00225 else if (path.isFile())
00226 {
00227 // try getting the resource from the file
00228 try
00229 {
00230 new JarFile(path);
00231 // convert the jar entry into URL format
00232 return new URL("jar:" + path.toURL() + "!/" + name);
00233 }
00234 catch (Exception e)
00235 {
00236 // we couldn't find resource in file
00237 return null;
00238 }
00239 }
00240
00241 //now we are checking the jar files
00242 try
00243 {
00244 // find all jar files in the directory
00245 String[] jarFiles = path.list(new FilenameFilter()
00246 {
00247 public boolean accept(File dir, String name)
00248 {
00249 return name.endsWith(".jar");
00250 }
00251 });
00252 // loop over jar files
00253 for (int i = 0; i < jarFiles.length; i++)
00254 {
00255 File file = new File(path, jarFiles[i]);
00256 JarFile jarFile = new JarFile(file);
00257
00258 // we see whether the jar file contains the resource we are looking for
00259 if (jarFile.getJarEntry(name) != null)
00260 {
00261 // convert the jar entry into URL format
00262 return new URL("jar:" + file.toURL() + "!/" + name);
00263 }
00264 }
00265 }
00266 catch (Exception e)
00267 {
00268 e.printStackTrace();
00269 }
00270 return null;
00271 }
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1.3.9.1