protected void addPathFile(final File pathComponent) throws IOException {
   if (!this.pathComponents.contains(pathComponent)) {
     this.pathComponents.addElement(pathComponent);
   }
   if (pathComponent.isDirectory()) {
     return;
   }
   final String absPathPlusTimeAndLength =
       pathComponent.getAbsolutePath()
           + pathComponent.lastModified()
           + "-"
           + pathComponent.length();
   String classpath = AntClassLoader.pathMap.get(absPathPlusTimeAndLength);
   if (classpath == null) {
     JarFile jarFile = null;
     try {
       jarFile = new JarFile(pathComponent);
       final Manifest manifest = jarFile.getManifest();
       if (manifest == null) {
         return;
       }
       classpath = manifest.getMainAttributes().getValue(Attributes.Name.CLASS_PATH);
     } finally {
       if (jarFile != null) {
         jarFile.close();
       }
     }
     if (classpath == null) {
       classpath = "";
     }
     AntClassLoader.pathMap.put(absPathPlusTimeAndLength, classpath);
   }
   if (!"".equals(classpath)) {
     final URL baseURL = AntClassLoader.FILE_UTILS.getFileURL(pathComponent);
     final StringTokenizer st = new StringTokenizer(classpath);
     while (st.hasMoreTokens()) {
       final String classpathElement = st.nextToken();
       final URL libraryURL = new URL(baseURL, classpathElement);
       if (!libraryURL.getProtocol().equals("file")) {
         this.log(
             "Skipping jar library "
                 + classpathElement
                 + " since only relative URLs are supported by this"
                 + " loader",
             3);
       } else {
         final String decodedPath = Locator.decodeUri(libraryURL.getFile());
         final File libraryFile = new File(decodedPath);
         if (!libraryFile.exists() || this.isInPath(libraryFile)) {
           continue;
         }
         this.addPathFile(libraryFile);
       }
     }
   }
 }
 private Manifest getJarManifest(final File container) throws IOException {
   if (container.isDirectory()) {
     return null;
   }
   final JarFile jarFile = this.jarFiles.get(container);
   if (jarFile == null) {
     return null;
   }
   return jarFile.getManifest();
 }
 private Certificate[] getCertificates(final File container, final String entry)
     throws IOException {
   if (container.isDirectory()) {
     return null;
   }
   final JarFile jarFile = this.jarFiles.get(container);
   if (jarFile == null) {
     return null;
   }
   final JarEntry ent = jarFile.getJarEntry(entry);
   return (Certificate[]) ((ent == null) ? null : ent.getCertificates());
 }
 protected URL getResourceURL(final File file, final String resourceName) {
   try {
     JarFile jarFile = this.jarFiles.get(file);
     if (jarFile == null && file.isDirectory()) {
       final File resource = new File(file, resourceName);
       if (resource.exists()) {
         try {
           return AntClassLoader.FILE_UTILS.getFileURL(resource);
         } catch (MalformedURLException ex) {
           return null;
         }
       }
     } else {
       if (jarFile == null) {
         if (!file.exists()) {
           return null;
         }
         jarFile = new JarFile(file);
         this.jarFiles.put(file, jarFile);
         jarFile = this.jarFiles.get(file);
       }
       final JarEntry entry = jarFile.getJarEntry(resourceName);
       if (entry != null) {
         try {
           return new URL("jar:" + AntClassLoader.FILE_UTILS.getFileURL(file) + "!/" + entry);
         } catch (MalformedURLException ex) {
           return null;
         }
       }
     }
   } catch (Exception e) {
     final String msg = "Unable to obtain resource from " + file + ": ";
     this.log(msg + e, 1);
     System.err.println(msg);
     e.printStackTrace();
   }
   return null;
 }
 private InputStream getResourceStream(final File file, final String resourceName) {
   try {
     JarFile jarFile = this.jarFiles.get(file);
     if (jarFile == null && file.isDirectory()) {
       final File resource = new File(file, resourceName);
       if (resource.exists()) {
         return new FileInputStream(resource);
       }
     } else {
       if (jarFile == null) {
         if (!file.exists()) {
           return null;
         }
         jarFile = new JarFile(file);
         this.jarFiles.put(file, jarFile);
         jarFile = this.jarFiles.get(file);
       }
       final JarEntry entry = jarFile.getJarEntry(resourceName);
       if (entry != null) {
         return jarFile.getInputStream(entry);
       }
     }
   } catch (Exception e) {
     this.log(
         "Ignoring Exception "
             + e.getClass().getName()
             + ": "
             + e.getMessage()
             + " reading resource "
             + resourceName
             + " from "
             + file,
         3);
   }
   return null;
 }