net.java.truevfs.driver.sfx

Class CheckedReadOnlySfxDriver

java.lang.Object

net.java.truecommons.shed.UniqueObject

net.java.truevfs.kernel.spec.FsDriver

net.java.truevfs.kernel.spec.FsArchiveDriver<E>

net.java.truevfs.comp.zipdriver.AbstractZipDriver<ZipDriverEntry>

net.java.truevfs.comp.zipdriver.ZipDriver

net.java.truevfs.driver.sfx.ReadOnlySfxDriver

net.java.truevfs.driver.sfx.CheckedReadOnlySfxDriver

All Implemented Interfaces:

ZipCharsetParameters, ZipEntryFactory<ZipDriverEntry>, ZipFileParameters<ZipDriverEntry>, ZipOutputStreamParameters, ZipParameters, FsController.Factory<FsManager>, FsModel.Factory<FsManager>

@Immutable
public class CheckedReadOnlySfxDriver
extends ReadOnlySfxDriver

An archive driver for SFX/EXE files which checks the CRC32 value for all ZIP entries in input archives. The additional CRC32 computation makes this class slower than its super class.

If there is a mismatch of the CRC32 values for a ZIP entry in an input archive, the InputStream.close() method of the corresponding stream for the archive entry will throw a Crc32Exception. Other than this, the archive entry will be processed normally. So if just the CRC32 value for the entry in the archive file has been modified, you can still read its entire contents.

Subclasses must be thread-safe and should be immutable!

Author:

Christian Schlichtherle

Field Summary

Fields inherited from class net.java.truevfs.driver.sfx.ReadOnlySfxDriver

SFX_CHARSET

Fields inherited from class net.java.truevfs.comp.zipdriver.ZipDriver

ZIP_CHARSET

Constructor Summary

Constructors

Constructor and Description
CheckedReadOnlySfxDriver()

Method Summary

Modifier and Type	Method and Description
boolean	check(ZipDriverEntry local, ZipInputService<ZipDriverEntry> input) Whether or not the content of the given entry shall get checked/authenticated when reading it.

Methods inherited from class net.java.truevfs.driver.sfx.ReadOnlySfxDriver

getCharset, getPreambled, newOutput

Methods inherited from class net.java.truevfs.comp.zipdriver.ZipDriver

newEntry, newEntry

Methods inherited from class net.java.truevfs.comp.zipdriver.AbstractZipDriver

decorate, fileSystemUri, getKeyManagerMap, getLevel, getMethod, getOverheadSize, getPool, getPostambled, getRedundantContentSupport, getRedundantMetaDataSupport, mountPointUri, newEntry, newInput, newOutput, newZipInput, rdc, sink, zipCryptoParameters

Methods inherited from class net.java.truevfs.kernel.spec.FsArchiveDriver

checkEncodable, isArchiveDriver, newController, newEntry, newInput, normalize, source, toString

Methods inherited from class net.java.truevfs.kernel.spec.FsDriver

decorate, newModel

Methods inherited from class net.java.truecommons.shed.UniqueObject

equals, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CheckedReadOnlySfxDriver

public CheckedReadOnlySfxDriver()

Method Detail

check

public boolean check(ZipDriverEntry local,
                     ZipInputService<ZipDriverEntry> input)

Whether or not the content of the given entry shall get checked/authenticated when reading it. If this method returns true and the check fails, then an IOException gets thrown.

Overrides:

check in class AbstractZipDriver<ZipDriverEntry>

Parameters:

local - the entry to test.

input - the origin of the entry.

Returns:

true