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; 
```

     */
    private void insert(File[] files) throws IOException {
        InputStream in;
        OutputStream out;
        TarOutputStream tout = null;
        TarEntry entry;
        
        if (mode == TAR_APPEND && archive.exists()) {
            tout = appendTarOutputStream();
        } else {
            createArchive();
            if ((out = openFileWrite(archive, false, false)) == null) {
                fatal(" ", 1);
            }
            if (compress != 0) {
                out = wrapOutputStream(out);
            }
            tout = new TarOutputStream(out);
        }
        
        // Insert new entries
        for (File file : files) {
            notice(file.getPath());
            entry = new TarEntry(file);
            tout.putNextEntry(entry);
            
            if (!file.isDirectory()) {
                if ((in = openFileRead(file)) == null) continue;
                processStream(in, tout);

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    // TODO
    private void update(File[] files) throws IOException {
        InputStream in;
        TarInputStream tin;
        TarEntry entry;
        TreeMap<String, Long> entries = new TreeMap<String, Long>();
        
        if ((in = openFileRead(archive)) == null) {
            fatal(" ", 1);
        }
        if (decompress != 0) {
            in = wrapInputStream(in);
        }
        
        tin = new TarInputStream(in);
        
        while ((entry = tin.getNextEntry()) != null) {
            entries.put(entry.getName(), entry.getModTime().getTime());
        }
        tin.close();
        
        long etime, ftime;
        ArrayList<File> list = new ArrayList<File>();

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     * TODO Need to parse Path for choosing specific files/directories either by direct naming
     *      or by wildcard patterns.
     * TODO Read list of entries to extract from FileList if its set.
     */
    private void extract() throws IOException {
        TarEntry entry;
        InputStream in = null;
        OutputStream out;
        TarInputStream tin;
        File file;
        
        if (archive != null) {
            if ((in = openFileRead(archive)) == null) {
                fatal(" ", 1);
            }
        } else {
            in = stdin;
        }
        
        if (decompress != 0) {
            in = wrapInputStream(in);
        }
        tin = new TarInputStream(in);
        
        if (use_stdout) {
            out = stdout;
        }
        
        while ((entry = tin.getNextEntry()) != null) {
            notice(entry.getName());
            file = new File(entry.getName());
            if (entry.isDirectory()) {
                if (!file.exists()) {
                    file.mkdirs();
                }
                continue;
            } else {
                if (file.exists()) {
                    if (keepOld || (keepNew && (file.lastModified() >= entry.getModTime().getTime()))) {
                        continue;
                    }
                    if (backup) {
                        file.renameTo(new File(file.getPath() + suffix));
                    }

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     *
     * TODO Need to parse Path for choosing specific files/directories either by direct naming
     *      or by wildcard patterns.
     */
    private void list() throws IOException {
        TarEntry entry;
        InputStream in = null;
        TarInputStream tin;
        
        if ((in = openFileRead(archive)) == null) {
            fatal(" ", 1);
        }
        
        if (decompress != 0) {
            in = wrapInputStream(in);
        }
        tin = new TarInputStream(in);
        
        while ((entry = tin.getNextEntry()) != null) {
            out(entry.getName());
        }
    }

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    /**
     * Outputs the differences found between the archive and the file system.
     */
    private void diff() throws IOException {
        TarEntry entry;
        InputStream in = null;
        TarInputStream tin;
        File file;
        
        if ((in = openFileRead(archive)) == null) {
            exit(1);
        }
        
        if (decompress != 0) {
            in = wrapInputStream(in);
        }
        tin = new TarInputStream(in);
        
        while ((entry = tin.getNextEntry()) != null) {
            file = new File(entry.getName());
            
            if (!file.exists()) {
                out(file + ": Warning: No such file or directory");
                continue;
            }
            
            if (file.lastModified() != entry.getModTime().getTime()) {
                out(file + ": Mod time is different");
            }
            
            if (file.length() != entry.getSize()) {
                out(file + ": Size is different");
            }
            
            // TODO check file mode
            // TODO check file ownership

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     * and to copy entries from another archive into another archive.
     *
     * FIXME does not verify that tin is actually a tar archive (Concat)
     */
    private void copy(TarInputStream tin, TarOutputStream tout) throws IOException {
        TarEntry entry;
        while ((entry = tin.getNextEntry()) != null) {
            tout.putNextEntry(entry);
            tin.copyEntryContents(tout);
            tout.closeEntry();
        }

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     */
    protected void fillMapsFromArchive(Resource src, String encoding,
            Map<String, Resource> fileEntries, Map<String, Resource> matchFileEntries,
            Map<String, Resource> dirEntries, Map<String, Resource> matchDirEntries) {


        TarEntry entry = null;
        TarInputStream ti = null;


        try {
            try {
                ti = new TarInputStream(src.getInputStream());
            } catch (IOException ex) {
                throw new BuildException("problem opening " + srcFile, ex);
            }
            while ((entry = ti.getNextEntry()) != null) {
                Resource r = new TarResource(src, entry);
                String name = entry.getName();
                if (entry.isDirectory()) {
                    name = trimSeparator(name);
                    dirEntries.put(name, r);
                    if (match(name)) {
                        matchDirEntries.put(name, r);
                    }

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


        TarEntry te = new TarEntry(vPath, preserveLeadingSlashes);
        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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            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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        }
    }


    protected void untar(File destDir, InputStream inputStream) throws IOException {
        TarInputStream tin = new TarInputStream(inputStream);
        TarEntry tarEntry = null;


        while ((tarEntry = tin.getNextEntry()) != null) {
            File destEntry = new File(destDir, tarEntry.getName());
            File parent = destEntry.getParentFile();


            if (!parent.exists()) {
                parent.mkdirs();
            }


            if (tarEntry.isDirectory()) {
                destEntry.mkdirs();
            } else {
                FileOutputStream fout = new FileOutputStream(destEntry);
                try {
                    tin.copyEntryContents(fout);

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