trinidad-api/src/main/java/org/apache/myfaces/trinidad/util/URLUtils.java [63:103]:
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  public static long getLastModified(URLConnection connection) throws IOException
  {
    long modified;
    if (connection instanceof JarURLConnection)
    {
      // The following hack is required to work-around a JDK bug.
      // getLastModified() on a JAR entry URL delegates to the actual JAR file
      // rather than the JAR entry.
      // This opens internally, and does not close, an input stream to the JAR
      // file.
      // In turn, you cannot close it by yourself, because it's internal.
      // The work-around is to get the modification date of the JAR file
      // manually,
      // and then close that connection again.

      URL jarFileUrl = ((JarURLConnection) connection).getJarFileURL();
      URLConnection jarFileConnection = jarFileUrl.openConnection();

      try
      {
        modified = jarFileConnection.getLastModified();
      }
      finally
      {
        try
        {
          jarFileConnection.getInputStream().close();
        }
        catch (Exception exception)
        {
          // Ignored
        }
      }
    }
    else
    {
      modified = connection.getLastModified();
    }

    return modified;
  }
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trinidad-impl/src/main/java/org/apache/myfaces/trinidadinternal/util/URLUtils.java [51:91]:
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  public static long getLastModified(URLConnection connection) throws IOException
  {
    long modified;
    if (connection instanceof JarURLConnection)
    {
      // The following hack is required to work-around a JDK bug.
      // getLastModified() on a JAR entry URL delegates to the actual JAR file
      // rather than the JAR entry.
      // This opens internally, and does not close, an input stream to the JAR
      // file.
      // In turn, you cannot close it by yourself, because it's internal.
      // The work-around is to get the modification date of the JAR file
      // manually,
      // and then close that connection again.

      URL jarFileUrl = ((JarURLConnection) connection).getJarFileURL();
      URLConnection jarFileConnection = jarFileUrl.openConnection();

      try
      {
        modified = jarFileConnection.getLastModified();
      }
      finally
      {
        try
        {
          jarFileConnection.getInputStream().close();
        }
        catch (Exception exception)
        {
          // Ignored
        }
      }
    }
    else
    {
      modified = connection.getLastModified();
    }

    return modified;
  }
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