Ant example source code file (Tar.java)
The Tar.java source code
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.taskdefs;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Vector;
import java.util.zip.GZIPOutputStream;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.ArchiveFileSet;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.types.FileSet;
import org.apache.tools.ant.types.Resource;
import org.apache.tools.ant.types.ResourceCollection;
import org.apache.tools.ant.types.resources.ArchiveResource;
import org.apache.tools.ant.types.resources.FileResource;
import org.apache.tools.ant.types.selectors.SelectorUtils;
import org.apache.tools.ant.types.resources.TarResource;
import org.apache.tools.ant.util.FileUtils;
import org.apache.tools.ant.util.MergingMapper;
import org.apache.tools.ant.util.SourceFileScanner;
import org.apache.tools.bzip2.CBZip2OutputStream;
import org.apache.tools.tar.TarConstants;
import org.apache.tools.tar.TarEntry;
import org.apache.tools.tar.TarOutputStream;
/**
* Creates a tar archive.
*
* @since Ant 1.1
*
* @ant.task category="packaging"
*/
public class Tar extends MatchingTask {
/**
* @deprecated since 1.5.x.
* Tar.WARN is deprecated and is replaced with
* Tar.TarLongFileMode.WARN
*/
public static final String WARN = "warn";
/**
* @deprecated since 1.5.x.
* Tar.FAIL is deprecated and is replaced with
* Tar.TarLongFileMode.FAIL
*/
public static final String FAIL = "fail";
/**
* @deprecated since 1.5.x.
* Tar.TRUNCATE is deprecated and is replaced with
* Tar.TarLongFileMode.TRUNCATE
*/
public static final String TRUNCATE = "truncate";
/**
* @deprecated since 1.5.x.
* Tar.GNU is deprecated and is replaced with
* Tar.TarLongFileMode.GNU
*/
public static final String GNU = "gnu";
/**
* @deprecated since 1.5.x.
* Tar.OMIT is deprecated and is replaced with
* Tar.TarLongFileMode.OMIT
*/
public static final String OMIT = "omit";
// CheckStyle:VisibilityModifier OFF - bc
File tarFile;
File baseDir;
private TarLongFileMode longFileMode = new TarLongFileMode();
// need to keep the package private version for backwards compatibility
Vector filesets = new Vector();
// we must keep two lists since other classes may modify the
// filesets Vector (it is package private) without us noticing
private Vector resourceCollections = new Vector();
Vector fileSetFiles = new Vector();
// CheckStyle:VisibilityModifier ON
/**
* Indicates whether the user has been warned about long files already.
*/
private boolean longWarningGiven = false;
private TarCompressionMethod compression = new TarCompressionMethod();
/**
* Add a new fileset with the option to specify permissions
* @return the tar fileset to be used as the nested element.
*/
public TarFileSet createTarFileSet() {
TarFileSet fs = new TarFileSet();
fs.setProject(getProject());
filesets.addElement(fs);
return fs;
}
/**
* Add a collection of resources to archive.
* @param res a resource collection to archive.
* @since Ant 1.7
*/
public void add(ResourceCollection res) {
resourceCollections.add(res);
}
/**
* Set is the name/location of where to create the tar file.
* @param tarFile the location of the tar file.
* @deprecated since 1.5.x.
* For consistency with other tasks, please use setDestFile().
*/
public void setTarfile(File tarFile) {
this.tarFile = tarFile;
}
/**
* Set is the name/location of where to create the tar file.
* @since Ant 1.5
* @param destFile The output of the tar
*/
public void setDestFile(File destFile) {
this.tarFile = destFile;
}
/**
* This is the base directory to look in for things to tar.
* @param baseDir the base directory.
*/
public void setBasedir(File baseDir) {
this.baseDir = baseDir;
}
/**
* Set how to handle long files, those with a path>100 chars.
* Optional, default=warn.
* <p>
* Allowable values are
* <ul>
* <li> truncate - paths are truncated to the maximum length
* <li> fail - paths greater than the maximum cause a build exception
* <li> warn - paths greater than the maximum cause a warning and GNU is used
* <li> gnu - GNU extensions are used for any paths greater than the maximum.
* <li> omit - paths greater than the maximum are omitted from the archive
* </ul>
* @param mode the mode string to handle long files.
* @deprecated since 1.5.x.
* setLongFile(String) is deprecated and is replaced with
* setLongFile(Tar.TarLongFileMode) to make Ant's Introspection
* mechanism do the work and also to encapsulate operations on
* the mode in its own class.
*/
public void setLongfile(String mode) {
log("DEPRECATED - The setLongfile(String) method has been deprecated."
+ " Use setLongfile(Tar.TarLongFileMode) instead.");
this.longFileMode = new TarLongFileMode();
longFileMode.setValue(mode);
}
/**
* Set how to handle long files, those with a path>100 chars.
* Optional, default=warn.
* <p>
* Allowable values are
* <ul>
* <li> truncate - paths are truncated to the maximum length
* <li> fail - paths greater than the maximum cause a build exception
* <li> warn - paths greater than the maximum cause a warning and GNU is used
* <li> gnu - GNU extensions are used for any paths greater than the maximum.
* <li> omit - paths greater than the maximum are omitted from the archive
* </ul>
* @param mode the mode to handle long file names.
*/
public void setLongfile(TarLongFileMode mode) {
this.longFileMode = mode;
}
/**
* Set compression method.
* Allowable values are
* <ul>
* <li> none - no compression
* <li> gzip - Gzip compression
* <li> bzip2 - Bzip2 compression
* </ul>
* @param mode the compression method.
*/
public void setCompression(TarCompressionMethod mode) {
this.compression = mode;
}
/**
* do the business
* @throws BuildException on error
*/
public void execute() throws BuildException {
if (tarFile == null) {
throw new BuildException("tarfile attribute must be set!",
getLocation());
}
if (tarFile.exists() && tarFile.isDirectory()) {
throw new BuildException("tarfile is a directory!",
getLocation());
}
if (tarFile.exists() && !tarFile.canWrite()) {
throw new BuildException("Can not write to the specified tarfile!",
getLocation());
}
Vector savedFileSets = (Vector) filesets.clone();
try {
if (baseDir != null) {
if (!baseDir.exists()) {
throw new BuildException("basedir does not exist!",
getLocation());
}
// add the main fileset to the list of filesets to process.
TarFileSet mainFileSet = new TarFileSet(fileset);
mainFileSet.setDir(baseDir);
filesets.addElement(mainFileSet);
}
if (filesets.size() == 0 && resourceCollections.size() == 0) {
throw new BuildException("You must supply either a basedir "
+ "attribute or some nested resource"
+ " collections.",
getLocation());
}
// check if tar is out of date with respect to each
// fileset
boolean upToDate = true;
for (Enumeration e = filesets.elements(); e.hasMoreElements();) {
upToDate &= check((TarFileSet) e.nextElement());
}
for (Enumeration e = resourceCollections.elements();
e.hasMoreElements();) {
upToDate &= check((ResourceCollection) e.nextElement());
}
if (upToDate) {
log("Nothing to do: " + tarFile.getAbsolutePath()
+ " is up to date.", Project.MSG_INFO);
return;
}
log("Building tar: " + tarFile.getAbsolutePath(), Project.MSG_INFO);
TarOutputStream tOut = null;
try {
tOut = new TarOutputStream(
compression.compress(
new BufferedOutputStream(
new FileOutputStream(tarFile))));
tOut.setDebug(true);
if (longFileMode.isTruncateMode()) {
tOut.setLongFileMode(TarOutputStream.LONGFILE_TRUNCATE);
} else if (longFileMode.isFailMode()
|| longFileMode.isOmitMode()) {
tOut.setLongFileMode(TarOutputStream.LONGFILE_ERROR);
} else {
// warn or GNU
tOut.setLongFileMode(TarOutputStream.LONGFILE_GNU);
}
longWarningGiven = false;
for (Enumeration e = filesets.elements();
e.hasMoreElements();) {
tar((TarFileSet) e.nextElement(), tOut);
}
for (Enumeration e = resourceCollections.elements();
e.hasMoreElements();) {
tar((ResourceCollection) e.nextElement(), tOut);
}
} catch (IOException ioe) {
String msg = "Problem creating TAR: " + ioe.getMessage();
throw new BuildException(msg, ioe, getLocation());
} finally {
FileUtils.close(tOut);
}
} finally {
filesets = savedFileSets;
}
}
/**
* tar a file
* @param file the file to tar
* @param tOut the output stream
* @param vPath the path name of the file to tar
* @param tarFileSet the fileset that the file came from.
* @throws IOException on error
*/
protected void tarFile(File file, TarOutputStream tOut, String vPath,
TarFileSet tarFileSet)
throws IOException {
if (file.equals(tarFile)) {
// If the archive is built for the first time and it is
// matched by a resource collection, then it hasn't been
// found in check (it hasn't been there) but will be
// included now.
//
// for some strange reason the old code would simply skip
// the entry and not fail, do the same now for backwards
// compatibility reasons. Without this, the which4j build
// fails in Gump
return;
}
tarResource(new FileResource(file), tOut, vPath, tarFileSet);
}
/**
* tar a resource
* @param r the resource to tar
* @param tOut the output stream
* @param vPath the path name of the file to tar
* @param tarFileSet the fileset that the file came from, may be null.
* @throws IOException on error
* @since Ant 1.7
*/
protected void tarResource(Resource r, TarOutputStream tOut, String vPath,
TarFileSet tarFileSet)
throws IOException {
if (!r.isExists()) {
return;
}
if (tarFileSet != null) {
String fullpath = tarFileSet.getFullpath(this.getProject());
if (fullpath.length() > 0) {
vPath = fullpath;
} else {
// don't add "" to the archive
if (vPath.length() <= 0) {
return;
}
String prefix = tarFileSet.getPrefix(this.getProject());
// '/' is appended for compatibility with the zip task.
if (prefix.length() > 0 && !prefix.endsWith("/")) {
prefix = prefix + "/";
}
vPath = prefix + vPath;
}
if (vPath.startsWith("/")
&& !tarFileSet.getPreserveLeadingSlashes()) {
int l = vPath.length();
if (l <= 1) {
// we would end up adding "" to the archive
return;
}
vPath = vPath.substring(1, l);
}
}
if (r.isDirectory() && !vPath.endsWith("/")) {
vPath += "/";
}
if (vPath.length() >= TarConstants.NAMELEN) {
if (longFileMode.isOmitMode()) {
log("Omitting: " + vPath, Project.MSG_INFO);
return;
} else if (longFileMode.isWarnMode()) {
log("Entry: " + vPath + " longer than "
+ TarConstants.NAMELEN + " characters.",
Project.MSG_WARN);
if (!longWarningGiven) {
log("Resulting tar file can only be processed "
+ "successfully by GNU compatible tar commands",
Project.MSG_WARN);
longWarningGiven = true;
}
} else if (longFileMode.isFailMode()) {
throw new BuildException("Entry: " + vPath
+ " 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 {
tOut.putNextEntry(te);
if (!r.isDirectory()) {
in = r.getInputStream();
byte[] buffer = new byte[8 * 1024];
int count = 0;
do {
tOut.write(buffer, 0, count);
count = in.read(buffer, 0, buffer.length);
} while (count != -1);
}
tOut.closeEntry();
} finally {
FileUtils.close(in);
}
}
/**
* Is the archive up to date in relationship to a list of files.
* @param files the files to check
* @return true if the archive is up to date.
* @deprecated since 1.5.x.
* use the two-arg version instead.
*/
protected boolean archiveIsUpToDate(String[] files) {
return archiveIsUpToDate(files, baseDir);
}
/**
* Is the archive up to date in relationship to a list of files.
* @param files the files to check
* @param dir the base directory for the files.
* @return true if the archive is up to date.
* @since Ant 1.5.2
*/
protected boolean archiveIsUpToDate(String[] files, File dir) {
SourceFileScanner sfs = new SourceFileScanner(this);
MergingMapper mm = new MergingMapper();
mm.setTo(tarFile.getAbsolutePath());
return sfs.restrict(files, dir, null, mm).length == 0;
}
/**
* Is the archive up to date in relationship to a list of files.
* @param r the files to check
* @return true if the archive is up to date.
* @since Ant 1.7
*/
protected boolean archiveIsUpToDate(Resource r) {
return SelectorUtils.isOutOfDate(new FileResource(tarFile), r,
FileUtils.getFileUtils()
.getFileTimestampGranularity());
}
/**
* Whether this task can deal with non-file resources.
*
* <p>This implementation returns true only if this task is
* <tar>. Any subclass of this class that also wants to
* support non-file resources needs to override this method. We
* need to do so for backwards compatibility reasons since we
* can't expect subclasses to support resources.</p>
* @return true for this task.
* @since Ant 1.7
*/
protected boolean supportsNonFileResources() {
return getClass().equals(Tar.class);
}
/**
* Checks whether the archive is out-of-date with respect to the resources
* of the given collection.
*
* <p>Also checks that either all collections only contain file
* resources or this class supports non-file collections.</p>
*
* <p>And - in case of file-collections - ensures that the archive won't
* contain itself.</p>
*
* @param rc the resource collection to check
* @return whether the archive is up-to-date
* @since Ant 1.7
*/
protected boolean check(ResourceCollection rc) {
boolean upToDate = true;
if (isFileFileSet(rc)) {
FileSet fs = (FileSet) rc;
upToDate = check(fs.getDir(getProject()), getFileNames(fs));
} else if (!rc.isFilesystemOnly() && !supportsNonFileResources()) {
throw new BuildException("only filesystem resources are supported");
} else if (rc.isFilesystemOnly()) {
HashSet basedirs = new HashSet();
HashMap basedirToFilesMap = new HashMap();
Iterator iter = rc.iterator();
while (iter.hasNext()) {
FileResource r = (FileResource) iter.next();
File base = r.getBaseDir();
if (base == null) {
base = Copy.NULL_FILE_PLACEHOLDER;
}
basedirs.add(base);
Vector files = (Vector) basedirToFilesMap.get(base);
if (files == null) {
files = new Vector();
basedirToFilesMap.put(base, new Vector());
}
files.add(r.getName());
}
iter = basedirs.iterator();
while (iter.hasNext()) {
File base = (File) iter.next();
Vector f = (Vector) basedirToFilesMap.get(base);
String[] files = (String[]) f.toArray(new String[f.size()]);
upToDate &=
check(base == Copy.NULL_FILE_PLACEHOLDER ? null : base,
files);
}
} else { // non-file resources
Iterator iter = rc.iterator();
while (upToDate && iter.hasNext()) {
Resource r = (Resource) iter.next();
upToDate &= archiveIsUpToDate(r);
}
}
return upToDate;
}
/**
* Checks whether the archive is out-of-date with respect to the
* given files, ensures that the archive won't contain itself.</p>
*
* @param basedir base directory for file names
* @param files array of relative file names
* @return whether the archive is up-to-date
* @since Ant 1.7
*/
protected boolean check(File basedir, String[] files) {
boolean upToDate = true;
if (!archiveIsUpToDate(files, basedir)) {
upToDate = false;
}
for (int i = 0; i < files.length; ++i) {
if (tarFile.equals(new File(basedir, files[i]))) {
throw new BuildException("A tar file cannot include "
+ "itself", getLocation());
}
}
return upToDate;
}
/**
* Adds the resources contained in this collection to the archive.
*
* <p>Uses the file based methods for file resources for backwards
* compatibility.</p>
*
* @param rc the collection containing resources to add
* @param tOut stream writing to the archive.
* @throws IOException on error.
* @since Ant 1.7
*/
protected void tar(ResourceCollection rc, TarOutputStream tOut)
throws IOException {
ArchiveFileSet afs = null;
if (rc instanceof ArchiveFileSet) {
afs = (ArchiveFileSet) rc;
}
if (afs != null && afs.size() > 1
&& afs.getFullpath(this.getProject()).length() > 0) {
throw new BuildException("fullpath attribute may only "
+ "be specified for "
+ "filesets that specify a "
+ "single file.");
}
TarFileSet tfs = asTarFileSet(afs);
if (isFileFileSet(rc)) {
FileSet fs = (FileSet) rc;
String[] files = getFileNames(fs);
for (int i = 0; i < files.length; i++) {
File f = new File(fs.getDir(getProject()), files[i]);
String name = files[i].replace(File.separatorChar, '/');
tarFile(f, tOut, name, tfs);
}
} else if (rc.isFilesystemOnly()) {
Iterator iter = rc.iterator();
while (iter.hasNext()) {
FileResource r = (FileResource) iter.next();
File f = r.getFile();
if (f == null) {
f = new File(r.getBaseDir(), r.getName());
}
tarFile(f, tOut, f.getName(), tfs);
}
} else { // non-file resources
Iterator iter = rc.iterator();
while (iter.hasNext()) {
Resource r = (Resource) iter.next();
tarResource(r, tOut, r.getName(), tfs);
}
}
}
/**
* whether the given resource collection is a (subclass of)
* FileSet that only contains file system resources.
* @param rc the resource collection to check.
* @return true if the collection is a fileset.
* @since Ant 1.7
*/
protected static final boolean isFileFileSet(ResourceCollection rc) {
return rc instanceof FileSet && rc.isFilesystemOnly();
}
/**
* Grabs all included files and directors from the FileSet and
* returns them as an array of (relative) file names.
* @param fs the fileset to operate on.
* @return a list of the filenames.
* @since Ant 1.7
*/
protected static final String[] getFileNames(FileSet fs) {
DirectoryScanner ds = fs.getDirectoryScanner(fs.getProject());
String[] directories = ds.getIncludedDirectories();
String[] filesPerSe = ds.getIncludedFiles();
String[] files = new String [directories.length + filesPerSe.length];
System.arraycopy(directories, 0, files, 0, directories.length);
System.arraycopy(filesPerSe, 0, files, directories.length,
filesPerSe.length);
return files;
}
/**
* Copies fullpath, prefix and permission attributes from the
* ArchiveFileSet to a new TarFileSet (or returns it unchanged if
* it already is a TarFileSet).
*
* @param archiveFileSet fileset to copy attributes from, may be null
* @return a new TarFileSet.
* @since Ant 1.7
*/
protected TarFileSet asTarFileSet(ArchiveFileSet archiveFileSet) {
TarFileSet tfs = null;
if (archiveFileSet != null && archiveFileSet instanceof TarFileSet) {
tfs = (TarFileSet) archiveFileSet;
} else {
tfs = new TarFileSet();
tfs.setProject(getProject());
if (archiveFileSet != null) {
tfs.setPrefix(archiveFileSet.getPrefix(getProject()));
tfs.setFullpath(archiveFileSet.getFullpath(getProject()));
if (archiveFileSet.hasFileModeBeenSet()) {
tfs.integerSetFileMode(archiveFileSet
.getFileMode(getProject()));
}
if (archiveFileSet.hasDirModeBeenSet()) {
tfs.integerSetDirMode(archiveFileSet
.getDirMode(getProject()));
}
if (archiveFileSet
instanceof org.apache.tools.ant.types.TarFileSet) {
org.apache.tools.ant.types.TarFileSet t =
(org.apache.tools.ant.types.TarFileSet) archiveFileSet;
if (t.hasUserNameBeenSet()) {
tfs.setUserName(t.getUserName());
}
if (t.hasGroupBeenSet()) {
tfs.setGroup(t.getGroup());
}
if (t.hasUserIdBeenSet()) {
tfs.setUid(t.getUid());
}
if (t.hasGroupIdBeenSet()) {
tfs.setGid(t.getGid());
}
}
}
}
return tfs;
}
/**
* This is a FileSet with the option to specify permissions
* and other attributes.
*/
public static class TarFileSet
extends org.apache.tools.ant.types.TarFileSet {
private String[] files = null;
private boolean preserveLeadingSlashes = false;
/**
* Creates a new <code>TarFileSet instance.
* Using a fileset as a constructor argument.
*
* @param fileset a <code>FileSet value
*/
public TarFileSet(FileSet fileset) {
super(fileset);
}
/**
* Creates a new <code>TarFileSet instance.
*
*/
public TarFileSet() {
super();
}
/**
* Get a list of files and directories specified in the fileset.
* @param p the current project.
* @return a list of file and directory names, relative to
* the baseDir for the project.
*/
public String[] getFiles(Project p) {
if (files == null) {
files = getFileNames(this);
}
return files;
}
/**
* A 3 digit octal string, specify the user, group and
* other modes in the standard Unix fashion;
* optional, default=0644
* @param octalString a 3 digit octal string.
*/
public void setMode(String octalString) {
setFileMode(octalString);
}
/**
* @return the current mode.
*/
public int getMode() {
return getFileMode(this.getProject());
}
/**
* Flag to indicates whether leading `/'s should
* be preserved in the file names.
* Optional, default is <code>false.
* @param b the leading slashes flag.
*/
public void setPreserveLeadingSlashes(boolean b) {
this.preserveLeadingSlashes = b;
}
/**
* @return the leading slashes flag.
*/
public boolean getPreserveLeadingSlashes() {
return preserveLeadingSlashes;
}
}
/**
* Set of options for long file handling in the task.
*
*/
public static class TarLongFileMode extends EnumeratedAttribute {
/** permissible values for longfile attribute */
public static final String
WARN = "warn",
FAIL = "fail",
TRUNCATE = "truncate",
GNU = "gnu",
OMIT = "omit";
private final String[] validModes = {WARN, FAIL, TRUNCATE, GNU, OMIT};
/** Constructor, defaults to "warn" */
public TarLongFileMode() {
super();
setValue(WARN);
}
/**
* @return the possible values for this enumerated type.
*/
public String[] getValues() {
return validModes;
}
/**
* @return true if value is "truncate".
*/
public boolean isTruncateMode() {
return TRUNCATE.equalsIgnoreCase(getValue());
}
/**
* @return true if value is "warn".
*/
public boolean isWarnMode() {
return WARN.equalsIgnoreCase(getValue());
}
/**
* @return true if value is "gnu".
*/
public boolean isGnuMode() {
return GNU.equalsIgnoreCase(getValue());
}
/**
* @return true if value is "fail".
*/
public boolean isFailMode() {
return FAIL.equalsIgnoreCase(getValue());
}
/**
* @return true if value is "omit".
*/
public boolean isOmitMode() {
return OMIT.equalsIgnoreCase(getValue());
}
}
/**
* Valid Modes for Compression attribute to Tar Task
*
*/
public static final class TarCompressionMethod extends EnumeratedAttribute {
// permissible values for compression attribute
/**
* No compression
*/
private static final String NONE = "none";
/**
* GZIP compression
*/
private static final String GZIP = "gzip";
/**
* BZIP2 compression
*/
private static final String BZIP2 = "bzip2";
/**
* Default constructor
*/
public TarCompressionMethod() {
super();
setValue(NONE);
}
/**
* Get valid enumeration values.
* @return valid enumeration values
*/
public String[] getValues() {
return new String[] {NONE, GZIP, BZIP2 };
}
/**
* This method wraps the output stream with the
* corresponding compression method
*
* @param ostream output stream
* @return output stream with on-the-fly compression
* @exception IOException thrown if file is not writable
*/
private OutputStream compress(final OutputStream ostream)
throws IOException {
final String v = getValue();
if (GZIP.equals(v)) {
return new GZIPOutputStream(ostream);
} else {
if (BZIP2.equals(v)) {
ostream.write('B');
ostream.write('Z');
return new CBZip2OutputStream(ostream);
}
}
return ostream;
}
}
}
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