in nbm-maven-plugin/src/main/java/org/apache/netbeans/nbm/BuildInstallersMojo.java [340:365]
boolean copyJarResourcesRecursively(final File destDir, final JarURLConnection jarConnection) throws IOException, MojoExecutionException {
final JarFile jarFile = jarConnection.getJarFile();
for (final Enumeration<JarEntry> e = jarFile.entries(); e.hasMoreElements();) {
final JarEntry entry = e.nextElement();
if (entry.getName().startsWith(jarConnection.getEntryName())) {
final String filename = StringUtils.removePrefix(entry.getName(), //
jarConnection.getEntryName());
final File f = new File(destDir, filename);
if (!entry.isDirectory()) {
final InputStream entryInputStream = jarFile.getInputStream(entry);
if (!copyStream(entryInputStream, f)) {
return false;
}
entryInputStream.close();
} else {
if (!ensureDirectoryExists(f)) {
throw new IOException("Could not create directory: " + f.getAbsolutePath());
}
}
}
}
return true;
}