zip file handling groovy/ java

This is just a simple prog to correlate dates and times of files in a zip file. We used it to verify delivery times externally sourced data. Its got some extra stuff in there since we only wanted a subset of the files.

import groovy.transform.Field

import java.text.DateFormat
import java.text.SimpleDateFormat
import java.util.regex.Matcher
import java.util.regex.Pattern
import java.util.zip.ZipEntry
                                   
                                    
import java.util.zip.ZipFile
import java.util.zip.ZipOutputStream


class FileEntry{
   String filename;
   String dir;
   Date date;
   String day;
   String time;
   DateFormat dayDf = new SimpleDateFormat("yyyy-MM-dd");
   DateFormat timeDf = new SimpleDateFormat("HH:mm:ss");
   
   FileEntry(String filename, Date d){
       this(filename, null, d);
   }
   FileEntry(String filename, String dir, Date d){
       this.filename = filename;
       this.date=d;
       day = dayDf.format(d);
       time = timeDf.format(d);
   }
   
   public String toString(){
       return filename+","+day+","+time+"\n";
   }
}


String zipFileName = "c:/temp/dropdirsAug2018.zip"
if(args.length>0)
    zipFileName=args[0]
ZipFile inputZip
try{
    inputZip = new ZipFile(zipFileName)
}catch(Exception e){
    println "Cannot find expected file $zipFileName"
    return
}

/*
 * Table listing files to check 
 * inName is the path and name of input files (including asterisk wildcard)
 * outName is the output name. 
 */
def zipFilesToMove = [
        [inName:"/path/*filename*.csv", outName:"<#>.filename.csv"],
        //[inName:"/path/otherfile.xml", outName:"otherfile.xml", outDir:"/notUsedHere"]

]


def list = doUnzip(inputZip, zipFilesToMove)

//Clean up old folders
//println list
writeToFile(list)
println "Done"

void writeToFile(List fileEntry){
println "Writing to file"
    File f = new File("output.csv");
    f.text = "";
    int x=0;
    for(FileEntry line:fileEntry){
        f << line.toString();
        println line
        x++;
    }
    println "Written $x lines"
}

// Do unzip for specified files
public List doUnzip(ZipFile inputZip, List zipFilesToCheck){
    List ret = new ArrayList();


    //Loop through bigZip to find files we want.
    // if we find a file we unzip it based ondate to different folder
    Enumeration e = inputZip.entries()
    while(e.hasMoreElements()) {
        ZipEntry zipEntry = e.nextElement()
        if (zipEntry.isDirectory()) {
            continue;
        }
        FileEntry fileEntry = checkIfValidZipEntry(zipEntry, zipFilesToCheck)
        if(fileEntry)
            ret << fileEntry;
    }
    return ret
}

public FileEntry checkIfValidZipEntry(ZipEntry zipEntry, List zipFilesToCheck){
    String zipEntryName = zipEntry.getName();
    long timestamp = zipEntry.getTime()
    for(Map zipFileToCheck: zipFilesToCheck){
        String regex = getRegex(zipFileToCheck.inName)
        // Note String matches, checks if whole string matches, not substring. ? Must use this instead
        Pattern p = Pattern.compile(regex);
        Matcher m = p.matcher(zipEntryName);
        boolean match = m.find()
        if(match){
            Date d = new Date();
            d.setTime(zipEntry.getTime())
            return new FileEntry(zipFileToCheck.inName, d);
        }        
    }
    //println "No match for $zipEntryName.. Ignoring"
    return null
}

String getRegex(String filename){
    return filename.replaceAll("\\*", ".*").replaceAll("\\/","\\\\/")
}