Class ArchiveManager

java.lang.Object

org.jrd.backend.data.ArchiveManager

public class ArchiveManager
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static final class	ArchiveManager.ArchiveManagerHolder
private static final class	ArchiveManager.ArchivePathManager

Field Summary

Fields

Modifier and Type	Field	Description
private int	currentD
private static final String	FILE_SEPARATOR
(package private) final String	jrdFolder
private ArchiveManager.ArchivePathManager	pathManager
private static final String	TMP_DIR

Constructor Summary

Constructors

Constructor	Description
ArchiveManager()

Method Summary

Modifier and Type	Method	Description
boolean	delete()	Deletes jrd temporary folder
private boolean	deleteRecursive(File f)	Deletes all nested files and directories, so the root can be deleted
private boolean	findClazz(ZipInputStream zis, String clazz)	Recursive search through nested jars
static ArchiveManager	getInstance()
boolean	isClassInFile(String clazz, File c)	Finds out whether desired class is contained in c
boolean	needExtract()	Returns whether extraction is necessary
File	newFile(File destinationDir, ZipEntry zipEntry)	ZipSlip guard
void	pack(File c)	Packs unpacked files
private File	recursiveUnpack(File toUnpack)	Recursively unpacks all required archives
void	recursiveZip(File f2zip, String fName, ZipOutputStream zOut)	Recursively adds file or files inside folder to archive
static boolean	shouldOpen(String n)	Determines whether this file can be opened with ZipInputStream
File	unpack(File c)	Unpacks files necessary to access desired class

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

TMP_DIR

private static final String TMP_DIR

FILE_SEPARATOR

private static final String FILE_SEPARATOR

pathManager

private ArchiveManager.ArchivePathManager pathManager

jrdFolder

final String jrdFolder

currentD

private int currentD

Constructor Details

ArchiveManager

public ArchiveManager()

Method Details

getInstance

public static ArchiveManager getInstance()

isClassInFile

public boolean isClassInFile(String clazz,
 File c)
                      throws IOException

Finds out whether desired class is contained in c

Parameters:

clazz - Class to search

Returns:

Whether class is in this file

Throws:

IOException - Error while reading streams

findClazz

private boolean findClazz(ZipInputStream zis,
 String clazz)
                   throws IOException

Recursive search through nested jars

Parameters:

zis - ZipInputStream of current jar

clazz - Class to search

Returns:

Whether class is in this file

Throws:

IOException - Error while reading streams

shouldOpen

public static boolean shouldOpen(String n)
                          throws IOException

Determines whether this file can be opened with ZipInputStream

Parameters:

n - Name of the file

Returns:

Whether file can be opened with ZipInputStream

Throws:

IOException

needExtract

public boolean needExtract()

Returns whether extraction is necessary

Returns:

If extraction is necessary

unpack

public File unpack(File c)
            throws IOException

Unpacks files necessary to access desired class

Returns:

.jar containing desired class

Throws:

IOException - Error while reading streams

recursiveUnpack

private File recursiveUnpack(File toUnpack)
                      throws IOException

Recursively unpacks all required archives

Parameters:

toUnpack - Archive to be unpacked

Returns:

File pointer to last archive

Throws:

IOException - if an I/O error occurs during unpacking

newFile

public File newFile(File destinationDir,
 ZipEntry zipEntry)
             throws IOException

ZipSlip guard

Parameters:

destinationDir - Destination directory

zipEntry - Zip entry

Returns:

File object pointing to "destinationDir/zipEntry"

Throws:

IOException - cannot happen

pack

public void pack(File c)
          throws IOException

Packs unpacked files

Throws:

IOException

recursiveZip

public void recursiveZip(File f2zip,
 String fName,
 ZipOutputStream zOut)
                  throws IOException

Recursively adds file or files inside folder to archive

Parameters:

f2zip - File/Folder to be archived

fName - Name of the file

zOut - Zip output stream used to output zipped bytes

Throws:

IOException - if an I/O error occurs when writing to the output stream

delete

public boolean delete()

Deletes jrd temporary folder

Returns:

whether folder was successfully deleted

deleteRecursive

private boolean deleteRecursive(File f)

Deletes all nested files and directories, so the root can be deleted

Parameters:

f - Directory to be deleted

Returns:

Whether directory was deleted