2.8.4 still in development

app/src/main/java/com/vectras/vm/util/TAR.java

@@ -0,0 +1,73 @@
+package com.vectras.vm.util;
+
+import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
+import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
+import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
+import org.apache.commons.compress.utils.IOUtils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class TAR {
+
+    private TAR() {
+
+    }
+
+    public static void compress(String name, File... files) throws IOException {
+        try (TarArchiveOutputStream out = getTarArchiveOutputStream(name)){
+            for (File file : files){
+                addToArchiveCompression(out, file, ".");
+            }
+        }
+    }
+
+    public static void decompress(String in, File out) throws IOException {
+        try (TarArchiveInputStream fin = new TarArchiveInputStream(new FileInputStream(in))){
+            TarArchiveEntry entry;
+            while ((entry = fin.getNextTarEntry()) != null) {
+                if (entry.isDirectory()) {
+                    continue;
+                }
+                File curfile = new File(out, entry.getName());
+                File parent = curfile.getParentFile();
+                if (!parent.exists()) {
+                    parent.mkdirs();
+                }
+                IOUtils.copy(fin, new FileOutputStream(curfile));
+            }
+        }
+    }
+
+    private static TarArchiveOutputStream getTarArchiveOutputStream(String name) throws IOException {
+        TarArchiveOutputStream taos = new TarArchiveOutputStream(new FileOutputStream(name));
+        // TAR has an 8 gig file limit by default, this gets around that
+        taos.setBigNumberMode(TarArchiveOutputStream.BIGNUMBER_STAR);
+        // TAR originally didn't support long file names, so enable the support for it
+        taos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
+        taos.setAddPaxHeadersForNonAsciiNames(true);
+        return taos;
+    }
+
+    private static void addToArchiveCompression(TarArchiveOutputStream out, File file, String dir) throws IOException {
+        String entry = dir + File.separator + file.getName();
+        if (file.isFile()){
+            out.putArchiveEntry(new TarArchiveEntry(file, entry));
+            try (FileInputStream in = new FileInputStream(file)){
+                IOUtils.copy(in, out);
+            }
+            out.closeArchiveEntry();
+        } else if (file.isDirectory()) {
+            File[] children = file.listFiles();
+            if (children != null){
+                for (File child : children){
+                    addToArchiveCompression(out, child, entry);
+                }
+            }
+        } else {
+            System.out.println(file.getName() + " is not supported");
+        }
+    }
+}