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; 
```

    protected void fetchEntry() {
        Resource archive = getArchive();
        TarInputStream i = null;
        try {
            i = new TarInputStream(archive.getInputStream());
            TarEntry te = null;
            while ((te = i.getNextEntry()) != null) {
                if (te.getName().equals(getName())) {
                    setEntry(te);
                    return;
                }
            }
        } catch (IOException e) {

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        tar.setLongFileMode(TarOutputStream.LONGFILE_GNU);
    }


    @Override
    public void visitSymlink(File link, String target, String relativePath) throws IOException {
        TarEntry e = new TarEntry(relativePath, LF_SYMLINK);
        int mode = IOUtils.mode(link);
        if (mode!=-1)   e.setMode(mode);


        try {
            StringBuffer linkName = (StringBuffer) LINKNAME_FIELD.get(e);
            linkName.setLength(0);
            linkName.append(target);

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        if(Functions.isWindows())
            relativePath = relativePath.replace('\\','/');


        if(file.isDirectory())
            relativePath+='/';
        TarEntry te = new TarEntry(relativePath);
        int mode = IOUtils.mode(file);
        if (mode!=-1)   te.setMode(mode);
        te.setModTime(file.lastModified());
        if(!file.isDirectory())
            te.setSize(file.length());


        tar.putNextEntry(te);


        if (!file.isDirectory()) {
            FileInputStream in = new FileInputStream(file);

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        if (entry.getName().length() >= TarConstants.NAMELEN) {


            if (longFileMode == LONGFILE_GNU) {
                // create a TarEntry for the LongLink, the contents
                // of which are the entry's name
                TarEntry longLinkEntry = new TarEntry(TarConstants.GNU_LONGLINK,
                                                      TarConstants.LF_GNUTYPE_LONGNAME);


                byte[] name = entry.getName().getBytes("UTF-8");
                longLinkEntry.setSize(name.length + 1);
                putNextEntry(longLinkEntry);
                write(name);
                write(0);
                closeEntry();
            } else if (longFileMode != LONGFILE_TRUNCATE) {

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        }


        if (this.hasHitEOF) {
            this.currEntry = null;
        } else {
            this.currEntry = new TarEntry(headerBuf);


            if (this.debug) {
                System.err.println("TarInputStream: SET CURRENTRY '"
                        + this.currEntry.getName()
                        + "' size = "

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     * Reads from a tar stream and stores obtained files to the base dir.
     */
    private static void readFromTar(String name, File baseDir, InputStream in) throws IOException {
        TarInputStream t = new TarInputStream(in);
        try {
            TarEntry te;
            while ((te = t.getNextEntry()) != null) {
                File f = new File(baseDir,te.getName());
                if(te.isDirectory()) {
                    f.mkdirs();
                } else {
                    File parent = f.getParentFile();
                    if (parent != null) parent.mkdirs();


                    byte linkFlag = (Byte) LINKFLAG_FIELD.get(te);
                    if (linkFlag==TarEntry.LF_SYMLINK) {
                        new FilePath(f).symlinkTo(te.getLinkName(), TaskListener.NULL);
                    } else {
                        IOUtils.copy(t,f);


                        f.setLastModified(te.getModTime().getTime());
                        int mode = te.getMode()&0777;
                        if(mode!=0 && !Functions.isWindows()) // be defensive
                            _chmod(f,mode);
                    }
                }
            }

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                        "Entry: " + vPath + " longer than " +
                        TarConstants.NAMELEN + "characters.", location);
                }
            }


            TarEntry te = new TarEntry(vPath);
            te.setModTime(file.lastModified());
            if (!file.isDirectory()) {
                te.setSize(file.length());
                te.setMode(tarFileSet.getMode());
            }
            te.setUserName(tarFileSet.getUserName());
            te.setGroupName(tarFileSet.getGroup());


            tOut.putNextEntry(te);


            if (!file.isDirectory()) {
                fIn = new FileInputStream(file);

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            log("Expanding: " + srcF + " into " + dir, Project.MSG_INFO);
            tis = new TarInputStream(
                compression.decompress(srcF,
                    new BufferedInputStream(
                        new FileInputStream(srcF))));
            TarEntry te = null;


            while ((te = tis.getNextEntry()) != null) {
                extractFile(fileUtils, srcF, dir, tis,
                            te.getName(), te.getModTime(), te.isDirectory());
            }
            log("expand complete", Project.MSG_VERBOSE);


        } catch (IOException ioe) {
            throw new BuildException("Error while expanding " + srcF.getPath(),

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


            TarEntry te = new TarEntry(vPath);
            te.setModTime(file.lastModified());
            if (!file.isDirectory()) {
                te.setSize(file.length());
                te.setMode(tarFileSet.getMode());
            } else {
                te.setMode(tarFileSet.getDirMode());
            }
            te.setUserName(tarFileSet.getUserName());
            te.setGroupName(tarFileSet.getGroup());


            tOut.putNextEntry(te);


            if (!file.isDirectory()) {
                fIn = new FileInputStream(file);

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            log("Expanding: " + srcF + " into " + dir, Project.MSG_INFO);
            tis = new TarInputStream(
                compression.decompress(srcF,
                    new BufferedInputStream(
                        new FileInputStream(srcF))));
            TarEntry te = null;


            while ((te = tis.getNextEntry()) != null) {
                extractFile(fileUtils, srcF, dir, tis,
                            te.getName(), te.getModTime(), te.isDirectory());
            }
            log("expand complete", Project.MSG_VERBOSE);


        } catch (IOException ioe) {
            throw new BuildException("Error while expanding " + srcF.getPath(),

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