public static java.lang.String findCorrectEncoding(java.io.InputStream is,
    java.util.Collection<java.lang.String> possibleCharsetNames) throws IOException
{
    java.lang.String rv=null;

    java.io.ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream();

    de.elbosso.util.Utilities.copyBetweenStreams(is, baos, true);

    byte[] bytes = baos.toByteArray();

    java.nio.CharBuffer out = java.nio.CharBuffer.wrap(new char[bytes.length * 4 + 1]);
    for(java.lang.String charsetName:possibleCharsetNames)
    {
        java.nio.charset.CharsetDecoder ebcdicDecoder =
            java.nio.charset.Charset.forName(charsetName).newDecoder();
        ebcdicDecoder.onMalformedInput(java.nio.charset.CodingErrorAction.REPORT);
        ebcdicDecoder.onUnmappableCharacter(java.nio.charset.CodingErrorAction.REPORT);

        java.nio.charset.CoderResult result =
            ebcdicDecoder.decode(java.nio.ByteBuffer.wrap(bytes), out, true);
        if (result.isError() || result.isOverflow() ||
                /*result.isUnderflow() ||*/ result.isMalformed() ||
                result.isUnmappable())
        {
            if(CLASS_LOGGER.isTraceEnabled())
                CLASS_LOGGER.trace("Cannot decode " + charsetName);
        }
        else
        {
            result = ebcdicDecoder.flush(out);
            if (result.isOverflow())
                if(CLASS_LOGGER.isTraceEnabled())
                    CLASS_LOGGER.trace("Cannot decode " + charsetName);
            if (result.isUnderflow())
            {
                if(CLASS_LOGGER.isTraceEnabled())
                    CLASS_LOGGER.trace("Successfully decoded " + charsetName);
                rv=charsetName;
                break;
            }
        }
    }
    return rv;
}