Examples of org.apache.tools.tar.TarEntry

org.apache.tools.tar.TarEntry
This class represents an entry in a Tar archive. It consists of the entry's header, as well as the entry's File. Entries can be instantiated in one of three ways, depending on how they are to be used.
TarEntries that are created from the header bytes read from an archive are instantiated with the TarEntry( byte[] ) constructor. These entries will be used when extracting from or listing the contents of an archive. These entries have their header filled in using the header bytes. They also set the File to null, since they reference an archive entry not a file.
TarEntries that are created from Files that are to be written into an archive are instantiated with the TarEntry( File ) constructor. These entries have their header filled in using the File's information. They also keep a reference to the File for convenience when writing entries.
Finally, TarEntries can be constructed from nothing but a name. This allows the programmer to construct the entry by hand, for instance when only an InputStream is available for writing to the archive, and the header information is constructed from other information. In this case the header fields are set to defaults and the File is set to null.
The C structure for a Tar Entry's header is:
```
 struct header { char name[NAMSIZ]; char mode[8]; char uid[8]; char gid[8]; char size[12]; char mtime[12]; char chksum[8]; char linkflag; char linkname[NAMSIZ]; char magic[8]; char uname[TUNMLEN]; char gname[TGNMLEN]; char devmajor[8]; char devminor[8]; } header; 
```

        this.spec = spec;
    }


    public void visitFile(FileVisitDetails fileDetails) {
        try {
            TarEntry archiveEntry = new TarEntry(fileDetails.getRelativePath().getPathString());
            archiveEntry.setModTime(fileDetails.getLastModified());
            archiveEntry.setSize(fileDetails.getSize());
            archiveEntry.setMode(UnixStat.FILE_FLAG | spec.getFileMode());
            tarOutStr.putNextEntry(archiveEntry);
            fileDetails.copyTo(tarOutStr);
            tarOutStr.closeEntry();
        } catch (Exception e) {
            throw new GradleException(String.format("Could not add %s to TAR '%s'.", fileDetails, tarFile), e);

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    }


    public void visitDir(FileVisitDetails dirDetails) {
        try {
            // Trailing slash on name indicates entry is a directory
            TarEntry archiveEntry = new TarEntry(dirDetails.getRelativePath().getPathString() + '/');
            archiveEntry.setModTime(dirDetails.getLastModified());
            archiveEntry.setMode(UnixStat.DIR_FLAG | spec.getDirMode());
            tarOutStr.putNextEntry(archiveEntry);
            tarOutStr.closeEntry();
        } catch (Exception e) {
            throw new GradleException(String.format("Could not add %s to TAR '%s'.", dirDetails, tarFile), e);
        }

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        AtomicBoolean stopFlag = new AtomicBoolean();
        try {
            FileInputStream inputStream = new FileInputStream(tarFile);
            try {
                NoCloseTarInputStream tar = new NoCloseTarInputStream(inputStream);
                TarEntry entry;
                while (!stopFlag.get() && (entry = tar.getNextEntry()) != null) {
                    if (entry.isDirectory()) {
                        visitor.visitDir(new DetailsImpl(entry, tar, stopFlag));
                    } else {
                        visitor.visitFile(new DetailsImpl(entry, tar, stopFlag));
                    }

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                source = new GZIPInputStream(source);
            } catch (IOException e) {
                throw new Parser.Failure("tar parser: " + e.getMessage(), url);
            }
        }
        TarEntry entry;
        final TarInputStream tis = new TarInputStream(source);                      
        File tmp = null;
        
        // loop through the elements in the tar file and parse every single file inside
        while (true) {
            try {
                if (tis.available() <= 0) break;
                entry = tis.getNextEntry();
                if (entry == null) break;
                if (entry.isDirectory() || entry.getSize() <= 0) continue;
                final String name = entry.getName();
                final int idx = name.lastIndexOf('.');
                final String mime = TextParser.mimeOf((idx > -1) ? name.substring(idx+1) : "");
                try {
                    tmp = FileUtils.createTempFile(this.getClass(), name);
                    FileUtils.copy(tis, tmp, entry.getSize());
                    subDocs = TextParser.parseSource(MultiProtocolURI.newURL(url,"#" + name), mime, null, tmp);
                    if (subDocs == null) continue;
                    for (final Document d: subDocs) docacc.add(d);
                } catch (final Parser.Failure e) {
                    log.logWarning("tar parser entry " + name + ": " + e.getMessage());

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   */
  public static void unTar(final InputStream in, final String untarDir) throws Exception{
    Log.logInfo("UNTAR", "starting");
    if(new File(untarDir).exists()){
      final TarInputStream tin = new TarInputStream(in);
      TarEntry tarEntry = tin.getNextEntry();
      while(tarEntry != null){
        final File destPath = new File(untarDir + File.separator + tarEntry.getName());
        if (!tarEntry.isDirectory()) {
          new File(destPath.getParent()).mkdirs(); // create missing subdirectories
          final FileOutputStream fout = new FileOutputStream(destPath);
          tin.copyEntryContents(fout);
          fout.close();
        } else {

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    // make a simple tar:
    final File simpleTar = new File(del, FILE);
    OutputStream os = new FileOutputStream(simpleTar); 
    TarOutputStream tos = new TarOutputStream(os);
    try {
      TarEntry te = new TarEntry("foo");
      byte[] data = "some-content".getBytes("UTF-8");
      te.setSize(data.length);
      tos.putNextEntry(te);
      tos.write(data);
      tos.closeEntry();
      tos.flush();
      tos.finish();

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    }
    TarInputStream tIn = null;
    try {
      tIn = new TarInputStream(includeTar.compression.decompress(file,
          new BufferedInputStream(new FileInputStream(file))));
      TarEntry te = null;
      while ((te = tIn.getNextEntry()) != null) {
        vPath = te.getName();


        // don't add "" to the archive
        if (vPath.length() <= 0) {
          continue;
        }


        if (te.isDirectory() && !vPath.endsWith("/")) {
          vPath += "/";
        }


        vPath = prefix + vPath;


        te.setName(vPath);
        tOut.putNextEntry(te);


        if (te.getSize() > 0) {
          byte[] buffer = new byte[8 * 1024];
          while (true) {
            int count = tIn.read(buffer, 0, buffer.length);
            if (count < 0) {
              break;

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                        + " longer than " + TarConstants.NAMELEN
                        + "characters.", getLocation());
            }
        }


        TarEntry te = new TarEntry(vPath);
        te.setModTime(r.getLastModified());
        // preserve permissions
        if (r instanceof ArchiveResource) {
            ArchiveResource ar = (ArchiveResource) r;
            te.setMode(ar.getMode());
            if (r instanceof TarResource) {
                TarResource tr = (TarResource) r;
                te.setUserName(tr.getUserName());
                te.setUserId(tr.getUid());
                te.setGroupName(tr.getGroup());
                te.setGroupId(tr.getGid());
            }
        }


        if (!r.isDirectory()) {
            if (r.size() > TarConstants.MAXSIZE) {
                throw new BuildException(
                    "Resource: " + r + " larger than "
                    + TarConstants.MAXSIZE + " bytes.");
            }
            te.setSize(r.getSize());
            // override permissions if set explicitly
            if (tarFileSet != null && tarFileSet.hasFileModeBeenSet()) {
                te.setMode(tarFileSet.getMode());
            }
        } else if (tarFileSet != null && tarFileSet.hasDirModeBeenSet()) {
            // override permissions if set explicitly
            te.setMode(tarFileSet.getDirMode(this.getProject()));
        }


        if (tarFileSet != null) {
            // only override permissions if set explicitly
            if (tarFileSet.hasUserNameBeenSet()) {
                te.setUserName(tarFileSet.getUserName());
            }
            if (tarFileSet.hasGroupBeenSet()) {
                te.setGroupName(tarFileSet.getGroup());
            }
            if (tarFileSet.hasUserIdBeenSet()) {
                te.setUserId(tarFileSet.getUid());
            }
            if (tarFileSet.hasGroupIdBeenSet()) {
                te.setGroupId(tarFileSet.getGid());
            }
        }


        InputStream in = null;
        try {

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        try {
            tis =
                new TarInputStream(compression.decompress(name,
                                                          new BufferedInputStream(stream)));
            log("Expanding: " + name + " into " + dir, Project.MSG_INFO);
            TarEntry te = null;
            FileNameMapper mapper = getMapper();
            while ((te = tis.getNextEntry()) != null) {
                extractFile(FileUtils.getFileUtils(), null, dir, tis,
                            te.getName(), te.getModTime(),
                            te.isDirectory(), mapper);
            }
            log("expand complete", Project.MSG_VERBOSE);
        } finally {
            FileUtils.close(tis);
        }

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        if (isReference()) {
            return ((Resource) getCheckedRef()).getInputStream();
        }
        Resource archive = getArchive();
        final TarInputStream i = new TarInputStream(archive.getInputStream());
        TarEntry te = null;
        while ((te = i.getNextEntry()) != null) {
            if (te.getName().equals(getName())) {
                return i;
            }
        }


        FileUtils.close(i);

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