How to use

unencodeResourceURIToFilePath

method

in

org.testcontainers.utility.MountableFile

private String getResourcePath() {
  if (path.contains(".jar!")) {
    resourcePath = extractClassPathResourceToTempLocation(this.path);
  } else {
    resourcePath = unencodeResourceURIToFilePath(path);
  }
  return resourcePath;
}

String urldecodedJarPath = unencodeResourceURIToFilePath(hostPath);
String internalPath = hostPath.replaceAll("[^!]*!/", "");

/**
 * Extract a file or directory tree from a JAR file to a temporary location.
 * This allows Docker to mount classpath resources as files.
 *
 * @param hostPath the path on the host, expected to be of the format 'file:/path/to/some.jar!/classpath/path/to/resource'
 * @return the path of the temporary file/directory
 */
private String extractClassPathResourceToTempLocation(final String hostPath) {
  File tmpLocation = createTempDirectory();
  //noinspection ResultOfMethodCallIgnored
  tmpLocation.delete();
  String urldecodedJarPath = unencodeResourceURIToFilePath(hostPath);
  String internalPath = hostPath.replaceAll("[^!]*!/", "");
  try (JarFile jarFile = new JarFile(urldecodedJarPath)) {
    Enumeration<JarEntry> entries = jarFile.entries();
    while (entries.hasMoreElements()) {
      JarEntry entry = entries.nextElement();
      final String name = entry.getName();
      if (name.startsWith(internalPath)) {
        log.debug("Copying classpath resource(s) from {} to {} to permit Docker to bind", hostPath, tmpLocation);
        copyFromJarToLocation(jarFile, entry, internalPath, tmpLocation);
      }
    }
  } catch (IOException e) {
    throw new IllegalStateException("Failed to process JAR file when extracting classpath resource: " + hostPath, e);
  }
  // Mark temporary files/dirs for deletion at JVM shutdown
  deleteOnExit(tmpLocation.toPath());
  return tmpLocation.getAbsolutePath();
}