I have been trying but unsuccessfully to recursively access a archive files using Apache commons compress in java.
I have a recursive zip file with the inner zips being of any type, like tar, jar, bz2, gzip etc and of any depth
eg: zip -> rar -> bz2 ->tar
tar -> bz2 -> rar -> zip -> gzip
Below is the code I have developed.
public final class zipLister{
private static final ArchiveStreamFactory factory = new ArchiveStreamFactory();
public static void main( String[] args) throws Exception {
File f = new File("three.zip");
processZip(f,Optional.of(""));
}
private static void processZip(File f2, Optional<String> of) throws ArchiveException, IOException {
File f = f2;
String Prefix = f2.getParent();
if (!f.isFile()) {
System.err.println(f + " doesn't exist or is a directory");
}
InputStream fis = new BufferedInputStream(new FileInputStream(f));
ArchiveInputStream ais;
ais = factory.createArchiveInputStream(fis);
System.out.println("Created "+ais.toString());
ArchiveEntry ae;
while((ae=ais.getNextEntry()) != null){
if (ae.getName().endsWith(".xml"))
System.out.println(ae.getName());
else{
processFile(ae,Prefix);
}
ais.close();
fis.close();
}
}
private static void processFile(ArchiveEntry ae2, String fileprefix) throws IOException, ArchiveException {
ArchiveEntry ae;
while ((ae = ((ArchiveInputStream) ae2).getNextEntry()) != null) {
if (ae.getName().endsWith(".xml"))
System.out.println(fileprefix + "\\\\" + ae.getName());
else{
fileprefix = fileprefix + "\\\\" + ae.getName();
processFile(ae,fileprefix);
}
}
}
My issue is i am unable to process/convert ZipArchiveEntry to stream. I am getting the below error.
org.apache.commons.compress.archivers.zip.ZipArchiveEntry cannot be cast to org.apache.commons.compress.archivers.ArchiveInputStream
I am not able to proceed forward. any help is appreciated.