Class HeaderReader

java.lang.Object

net.lingala.zip4j.headers.HeaderReader

public class HeaderReader
extends Object

Helper class to read header information for the zip file

Field Summary

Fields

Modifier and Type	Field	Description
private final byte[]	intBuff
private final RawIO	rawIO
private ZipModel	zipModel

Constructor Summary

Constructors

Constructor	Description
HeaderReader()

Method Summary

Modifier and Type	Method	Description
private long	getNumberOfEntriesInCentralDirectory(ZipModel zipModel)
boolean	isDirectory(byte[] externalFileAttributes, String fileName)
private long	locateOffsetOfEndOfCentralDirectory(RandomAccessFile randomAccessFile)
private long	locateOffsetOfEndOfCentralDirectoryByReverseSeek(RandomAccessFile randomAccessFile)
private List<ExtraDataRecord>	parseExtraDataRecords(byte[] extraFieldBuf, int extraFieldLength)
private AESExtraDataRecord	readAesExtraDataRecord(List<ExtraDataRecord> extraDataRecords, RawIO rawIO)
private void	readAesExtraDataRecord(AbstractFileHeader fileHeader, RawIO rawIO)
ZipModel	readAllHeaders(RandomAccessFile zip4jRaf, Zip4jConfig zip4jConfig)
private CentralDirectory	readCentralDirectory(RandomAccessFile zip4jRaf, RawIO rawIO, Charset charset)
DataDescriptor	readDataDescriptor(InputStream inputStream, boolean isZip64Format)
private EndOfCentralDirectoryRecord	readEndOfCentralDirectoryRecord(RandomAccessFile zip4jRaf, RawIO rawIO, Zip4jConfig zip4jConfig)
private List<ExtraDataRecord>	readExtraDataRecords(InputStream inputStream, int extraFieldLength)
private void	readExtraDataRecords(InputStream inputStream, LocalFileHeader localFileHeader)
private List<ExtraDataRecord>	readExtraDataRecords(RandomAccessFile zip4jRaf, int extraFieldLength)
private void	readExtraDataRecords(RandomAccessFile zip4jRaf, FileHeader fileHeader)
LocalFileHeader	readLocalFileHeader(InputStream inputStream, Charset charset)
private Zip64EndOfCentralDirectoryRecord	readZip64EndCentralDirRec(RandomAccessFile zip4jRaf, RawIO rawIO)
private Zip64EndOfCentralDirectoryLocator	readZip64EndOfCentralDirectoryLocator(RandomAccessFile zip4jRaf, RawIO rawIO, long offsetEndOfCentralDirectoryRecord)
private Zip64ExtendedInfo	readZip64ExtendedInfo(List<ExtraDataRecord> extraDataRecords, RawIO rawIO, long uncompressedSize, long compressedSize, long offsetLocalHeader, int diskNumberStart)
private void	readZip64ExtendedInfo(FileHeader fileHeader, RawIO rawIO)
private void	readZip64ExtendedInfo(LocalFileHeader localFileHeader, RawIO rawIO)
private String	readZipComment(RandomAccessFile raf, int commentLength, Charset charset)
private void	seekInCurrentPart(RandomAccessFile randomAccessFile, long pos)
private void	setFilePointerToReadZip64EndCentralDirLoc(RandomAccessFile zip4jRaf, long offsetEndOfCentralDirectoryRecord)

Methods inherited from class Object

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

Field Details

zipModel

private ZipModel zipModel

rawIO

private final RawIO rawIO

intBuff

private final byte[] intBuff

Constructor Details

HeaderReader

public HeaderReader()

Method Details

readAllHeaders

public ZipModel readAllHeaders(RandomAccessFile zip4jRaf,
 Zip4jConfig zip4jConfig)
                        throws IOException

Throws:

IOException

readEndOfCentralDirectoryRecord

private EndOfCentralDirectoryRecord readEndOfCentralDirectoryRecord(RandomAccessFile zip4jRaf,
 RawIO rawIO,
 Zip4jConfig zip4jConfig)
                                                             throws IOException

Throws:

IOException

readCentralDirectory

private CentralDirectory readCentralDirectory(RandomAccessFile zip4jRaf,
 RawIO rawIO,
 Charset charset)
                                       throws IOException

Throws:

IOException

readExtraDataRecords

private void readExtraDataRecords(RandomAccessFile zip4jRaf,
 FileHeader fileHeader)
                           throws IOException

Throws:

IOException

readExtraDataRecords

private void readExtraDataRecords(InputStream inputStream,
 LocalFileHeader localFileHeader)
                           throws IOException

Throws:

IOException

readExtraDataRecords

private List<ExtraDataRecord> readExtraDataRecords(RandomAccessFile zip4jRaf,
 int extraFieldLength)
                                            throws IOException

Throws:

IOException

readExtraDataRecords

private List<ExtraDataRecord> readExtraDataRecords(InputStream inputStream,
 int extraFieldLength)
                                            throws IOException

Throws:

IOException

parseExtraDataRecords

private List<ExtraDataRecord> parseExtraDataRecords(byte[] extraFieldBuf,
 int extraFieldLength)

readZip64EndOfCentralDirectoryLocator

private Zip64EndOfCentralDirectoryLocator readZip64EndOfCentralDirectoryLocator(RandomAccessFile zip4jRaf,
 RawIO rawIO,
 long offsetEndOfCentralDirectoryRecord)
                                                                         throws IOException

Throws:

IOException

readZip64EndCentralDirRec

private Zip64EndOfCentralDirectoryRecord readZip64EndCentralDirRec(RandomAccessFile zip4jRaf,
 RawIO rawIO)
                                                            throws IOException

Throws:

IOException

readZip64ExtendedInfo

private void readZip64ExtendedInfo(FileHeader fileHeader,
 RawIO rawIO)

readZip64ExtendedInfo

private void readZip64ExtendedInfo(LocalFileHeader localFileHeader,
 RawIO rawIO)
                            throws ZipException

Throws:

ZipException

readZip64ExtendedInfo

private Zip64ExtendedInfo readZip64ExtendedInfo(List<ExtraDataRecord> extraDataRecords,
 RawIO rawIO,
 long uncompressedSize,
 long compressedSize,
 long offsetLocalHeader,
 int diskNumberStart)

setFilePointerToReadZip64EndCentralDirLoc

private void setFilePointerToReadZip64EndCentralDirLoc(RandomAccessFile zip4jRaf,
 long offsetEndOfCentralDirectoryRecord)
                                                throws IOException

Throws:

IOException

readLocalFileHeader

public LocalFileHeader readLocalFileHeader(InputStream inputStream,
 Charset charset)
                                    throws IOException

Throws:

IOException

readDataDescriptor

public DataDescriptor readDataDescriptor(InputStream inputStream,
 boolean isZip64Format)
                                  throws IOException

Throws:

IOException

readAesExtraDataRecord

private void readAesExtraDataRecord(AbstractFileHeader fileHeader,
 RawIO rawIO)
                             throws ZipException

Throws:

ZipException

readAesExtraDataRecord

private AESExtraDataRecord readAesExtraDataRecord(List<ExtraDataRecord> extraDataRecords,
 RawIO rawIO)
                                           throws ZipException

Throws:

ZipException

getNumberOfEntriesInCentralDirectory

private long getNumberOfEntriesInCentralDirectory(ZipModel zipModel)

locateOffsetOfEndOfCentralDirectory

private long locateOffsetOfEndOfCentralDirectory(RandomAccessFile randomAccessFile)
                                          throws IOException

Throws:

IOException

locateOffsetOfEndOfCentralDirectoryByReverseSeek

private long locateOffsetOfEndOfCentralDirectoryByReverseSeek(RandomAccessFile randomAccessFile)
                                                       throws IOException

Throws:

IOException

seekInCurrentPart

private void seekInCurrentPart(RandomAccessFile randomAccessFile,
 long pos)
                        throws IOException

Throws:

IOException

readZipComment

private String readZipComment(RandomAccessFile raf,
 int commentLength,
 Charset charset)

isDirectory

public boolean isDirectory(byte[] externalFileAttributes,
 String fileName)