Changing Date from timestame to human readable Date from String

change-ts-to-human-readable.groovy

import java.nio.file.Files
import java.nio.file.Path
import java.nio.file.Paths

directory = args[0] // directory
d = Paths.get(directory)
stream = Files.newDirectoryStream(d)
stream.each {
    p = it as Path;
    println "file -> ${p}"
    p.toFile().eachLine { line ->
        if ((matcher = line =~ /^.+(new\s+(?:java\.util\.)?Date\(([0-9]+)L\)).+$/)) {
            wholeLine = matcher.getAt(0).getAt(0) as String
            toReplace = matcher.getAt(0).getAt(1)
            ts = matcher.getAt(0).getAt(2)
            date = new Date(Long.parseUnsignedLong(ts as String))
            formated = date.format('yyyy-MM-dd')
            toBeReplaced = "FORMAT.parse(\"${formated}\")"
            replacedLine = wholeLine.replace(toReplace as String, toBeReplaced as String)
            println "wholeLine: ${wholeLine}"
            println "replacedLine: ${replacedLine}"
        }
    }
}