Class ZipInputStream

java.lang.Object

java.io.InputStream

net.lingala.zip4j.io.inputstream.ZipInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ZipInputStream
extends InputStream

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	canSkipExtendedLocalFileHeader
private CRC32	crc32
private DecompressedInputStream	decompressedInputStream
private byte[]	endOfEntryBuffer
private boolean	entryEOFReached
private HeaderReader	headerReader
private PushbackInputStream	inputStream
private LocalFileHeader	localFileHeader
private char[]	password
private PasswordCallback	passwordCallback
private boolean	streamClosed
private Zip4jConfig	zip4jConfig

Constructor Summary

Constructors

Modifier	Constructor	Description
	ZipInputStream(InputStream inputStream)
	ZipInputStream(InputStream inputStream, char[] password)
	ZipInputStream(InputStream inputStream, char[] password, Charset charset)
	ZipInputStream(InputStream inputStream, char[] password, Zip4jConfig zip4jConfig)
private	ZipInputStream(InputStream inputStream, char[] password, PasswordCallback passwordCallback, Zip4jConfig zip4jConfig)
	ZipInputStream(InputStream inputStream, Charset charset)
	ZipInputStream(InputStream inputStream, PasswordCallback passwordCallback)
	ZipInputStream(InputStream inputStream, PasswordCallback passwordCallback, Charset charset)
	ZipInputStream(InputStream inputStream, PasswordCallback passwordCallback, Zip4jConfig zip4jConfig)

Method Summary

Modifier and Type	Method	Description
private void	assertStreamOpen()
int	available()
private boolean	checkIfZip64ExtraDataRecordPresentInLFH(List<ExtraDataRecord> extraDataRecords)
void	close()
private void	endOfCompressedDataReached()
private int	getAesEncryptionHeaderSize(AESExtraDataRecord aesExtraDataRecord)
private long	getCompressedSize(LocalFileHeader localFileHeader)
private int	getEncryptionHeaderSize(LocalFileHeader localFileHeader)
LocalFileHeader	getNextEntry()
LocalFileHeader	getNextEntry(FileHeader fileHeader, boolean readUntilEndOfCurrentEntryIfOpen)
private CipherInputStream<?>	initializeCipherInputStream(ZipEntryInputStream zipEntryInputStream, LocalFileHeader localFileHeader)
private DecompressedInputStream	initializeDecompressorForThisEntry(CipherInputStream<?> cipherInputStream, LocalFileHeader localFileHeader)
private DecompressedInputStream	initializeEntryInputStream(LocalFileHeader localFileHeader)
private boolean	isEncryptionMethodZipStandard(LocalFileHeader localFileHeader)
private boolean	isEntryDirectory(String entryName)
int	read()
int	read(byte[] b)
int	read(byte[] b, int off, int len)
private void	readExtendedLocalFileHeaderIfPresent()
private void	readUntilEndOfEntry()
private void	resetFields()
void	setPassword(char[] password)	Sets the password for the inputstream.
private void	verifyCrc()
private void	verifyLocalFileHeader(LocalFileHeader localFileHeader)

Methods inherited from class InputStream

mark, markSupported, reset, skip

Methods inherited from class Object

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

Field Details

inputStream

private PushbackInputStream inputStream

decompressedInputStream

private DecompressedInputStream decompressedInputStream

headerReader

private HeaderReader headerReader

password

private char[] password

passwordCallback

private PasswordCallback passwordCallback

localFileHeader

private LocalFileHeader localFileHeader

crc32

private CRC32 crc32

endOfEntryBuffer

private byte[] endOfEntryBuffer

canSkipExtendedLocalFileHeader

private boolean canSkipExtendedLocalFileHeader

zip4jConfig

private Zip4jConfig zip4jConfig

streamClosed

private boolean streamClosed

entryEOFReached

private boolean entryEOFReached

Constructor Details

ZipInputStream

public ZipInputStream(InputStream inputStream)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 Charset charset)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 char[] password)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 PasswordCallback passwordCallback)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 char[] password,
 Charset charset)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 PasswordCallback passwordCallback,
 Charset charset)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 char[] password,
 Zip4jConfig zip4jConfig)

ZipInputStream

public ZipInputStream(InputStream inputStream,
 PasswordCallback passwordCallback,
 Zip4jConfig zip4jConfig)

ZipInputStream

private ZipInputStream(InputStream inputStream,
 char[] password,
 PasswordCallback passwordCallback,
 Zip4jConfig zip4jConfig)

Method Details

getNextEntry

public LocalFileHeader getNextEntry()
                             throws IOException

Throws:

IOException

getNextEntry

public LocalFileHeader getNextEntry(FileHeader fileHeader,
 boolean readUntilEndOfCurrentEntryIfOpen)
                             throws IOException

Throws:

IOException

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

read

public int read(byte[] b,
 int off,
 int len)
         throws IOException

Overrides:

read in class InputStream

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class InputStream

Throws:

IOException

available

public int available()
              throws IOException

Overrides:

available in class InputStream

Throws:

IOException

setPassword

public void setPassword(char[] password)

Sets the password for the inputstream. This password will be used for any subsequent encrypted entries that will be read from this stream. If this method is called when an entry is being read, it has no effect on the read action of the current entry, and the password will take effect from any subsequent entry reads.

Parameters:

password - Password to be used for reading of entries from the zip input stream

endOfCompressedDataReached

private void endOfCompressedDataReached()
                                 throws IOException

Throws:

IOException

initializeEntryInputStream

private DecompressedInputStream initializeEntryInputStream(LocalFileHeader localFileHeader)
                                                    throws IOException

Throws:

IOException

initializeCipherInputStream

private CipherInputStream<?> initializeCipherInputStream(ZipEntryInputStream zipEntryInputStream,
 LocalFileHeader localFileHeader)
                                                  throws IOException

Throws:

IOException

initializeDecompressorForThisEntry

private DecompressedInputStream initializeDecompressorForThisEntry(CipherInputStream<?> cipherInputStream,
 LocalFileHeader localFileHeader)
                                                            throws ZipException

Throws:

ZipException

readExtendedLocalFileHeaderIfPresent

private void readExtendedLocalFileHeaderIfPresent()
                                           throws IOException

Throws:

IOException

verifyLocalFileHeader

private void verifyLocalFileHeader(LocalFileHeader localFileHeader)
                            throws IOException

Throws:

IOException

checkIfZip64ExtraDataRecordPresentInLFH

private boolean checkIfZip64ExtraDataRecordPresentInLFH(List<ExtraDataRecord> extraDataRecords)

verifyCrc

private void verifyCrc()
                throws IOException

Throws:

IOException

resetFields

private void resetFields()

isEntryDirectory

private boolean isEntryDirectory(String entryName)

getCompressedSize

private long getCompressedSize(LocalFileHeader localFileHeader)
                        throws ZipException

Throws:

ZipException

getEncryptionHeaderSize

private int getEncryptionHeaderSize(LocalFileHeader localFileHeader)
                             throws ZipException

Throws:

ZipException

readUntilEndOfEntry

private void readUntilEndOfEntry()
                          throws IOException

Throws:

IOException

getAesEncryptionHeaderSize

private int getAesEncryptionHeaderSize(AESExtraDataRecord aesExtraDataRecord)
                                throws ZipException

Throws:

ZipException

isEncryptionMethodZipStandard

private boolean isEncryptionMethodZipStandard(LocalFileHeader localFileHeader)

assertStreamOpen

private void assertStreamOpen()
                       throws IOException

Throws:

IOException