!#!/bin/bash

grep -lir --include \*.java -e 'implements java.io.Serializable' -e 'implements Serializable' . | xargs grep -Lir -e 'serialVersionUID' | while read -r line ; do awk '/implements (java.io.)?Serializable/{print;print "\n\t\nprivate static final long serialVersionUID = 1L;";next}1' $line > temp.java && mv temp.java $line ; done