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MDW is a workflow framework specializing in microservice orchestration

There is a newer version: 6.1.39

package com.centurylink.mdw.util;

import java.io.UnsupportedEncodingException;
import java.util.regex.Pattern;

public class TextHelper {

    private static Pattern p = Pattern.compile("\\A(\n" +
            "  [\\x09\\x0A\\x0D\\x20-\\x7E]             # ASCII\\n" +
            "| [\\xC2-\\xDF][\\x80-\\xBF]               # non-overlong 2-byte\n" +
            "|  \\xE0[\\xA0-\\xBF][\\x80-\\xBF]         # excluding overlongs\n" +
            "| [\\xE1-\\xEC\\xEE\\xEF][\\x80-\\xBF]{2}  # straight 3-byte\n" +
            "|  \\xED[\\x80-\\x9F][\\x80-\\xBF]         # excluding surrogates\n" +
            "|  \\xF0[\\x90-\\xBF][\\x80-\\xBF]{2}      # planes 1-3\n" +
            "| [\\xF1-\\xF3][\\x80-\\xBF]{3}            # planes 4-15\n" +
            "|  \\xF4[\\x80-\\x8F][\\x80-\\xBF]{2}      # plane 16\n" +
            ")*\\z", Pattern.COMMENTS);

    static boolean looksLikeUTF8(byte[] utf8) throws UnsupportedEncodingException {

        String phonyString = new String(utf8, "ISO-8859-1");
        return p.matcher(phonyString).matches();
    }


}