import org.apache.commons.lang3.StringUtils;
public class Test {
    public static void main(String args[]) {
        int MAX_LENGTH=32;
        String fullName= "JIRA-1054_rename_1234_to_abcdef_try2";
        String mnemonic = mnemonicOf(fullName);
        String path = StringUtils.right(mnemonic, MAX_LENGTH);
        System.out.println(path);
    }
    private static String mnemonicOf(String name) {
        // Do not need the complexity of NameMangler here, since we uniquify as needed.
        return name.replaceAll("(%[0-9A-F]{2}|[^a-zA-Z0-9-_.])+", "_");
    }
}