Class VirtualJarFileInputStream

java.lang.Object

java.io.InputStream

org.jboss.vfs.VirtualJarFileInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class VirtualJarFileInputStream
extends InputStream

An input stream that can be used to wrap an VirtualJarInputStream (so any VFS dir) and produce a byte stream following the Zip standard.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
private static class	VirtualJarFileInputStream.ByteBuffer
private class	VirtualJarFileInputStream.ProcessedEntry
private static enum	VirtualJarFileInputStream.State	Basic state machine that will allow the process to transition between the different process states.

Field Summary

Fields

Modifier and Type	Field	Description
private final VirtualJarFileInputStream.ByteBuffer	buffer
private long	centralOffset
private final CRC32	crc
private int	currentCentralEntryIdx
private VirtualJarFileInputStream.ProcessedEntry	currentEntry
private VirtualJarFileInputStream.State	currentState
private static final int	MINIMUM_BUFFER_LENGTH
private final List<VirtualJarFileInputStream.ProcessedEntry>	processedEntries
private long	totalRead
private final VirtualJarInputStream	virtualJarInputStream

Constructor Summary

Constructors

Constructor	Description
VirtualJarFileInputStream(VirtualJarInputStream virtualJarInputStream)	Create with the minimum put length
VirtualJarFileInputStream(VirtualJarInputStream virtualJarInputStream, int bufferLength)	Create with the a specified put size

Method Summary

Modifier and Type	Method	Description
private void	buffer(byte b)	Buffer a single byte
private void	buffer(byte[] bytes)	Buffer a byte array
private void	bufferCentralDirectoryEnd()	Write the central file header records.
private void	bufferInt(long i)	Buffer a 32-bit integer in little-endian
private boolean	bufferLocalFileHeader()	Buffer the content of the local file header for a single entry.
private boolean	bufferNextCentralFileHeader()	Buffer the central file header record for a single entry.
private void	bufferShort(int i)	Buffer a 16-bit short in little-endian
void	close()
private void	closeCurrent()	Close the current entry, and calculate the crc value.
int	read()

Methods inherited from class InputStream

available, mark, markSupported, nullInputStream, read, read, readAllBytes, readNBytes, readNBytes, reset, skip, skipNBytes, transferTo

Methods inherited from class Object

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

Field Details

MINIMUM_BUFFER_LENGTH

private static final int MINIMUM_BUFFER_LENGTH

See Also:

• Constant Field Values

virtualJarInputStream

private final VirtualJarInputStream virtualJarInputStream

currentState

private VirtualJarFileInputStream.State currentState

processedEntries

private final List<VirtualJarFileInputStream.ProcessedEntry> processedEntries

currentEntry

private VirtualJarFileInputStream.ProcessedEntry currentEntry

buffer

private final VirtualJarFileInputStream.ByteBuffer buffer

crc

private final CRC32 crc

currentCentralEntryIdx

private int currentCentralEntryIdx

centralOffset

private long centralOffset

totalRead

private long totalRead

Constructor Details

VirtualJarFileInputStream

public VirtualJarFileInputStream(VirtualJarInputStream virtualJarInputStream)

Create with the minimum put length

Parameters:

virtualJarInputStream - The virtual jar input stream to base the stream off of

VirtualJarFileInputStream

public VirtualJarFileInputStream(VirtualJarInputStream virtualJarInputStream,
 int bufferLength)

Create with the a specified put size

Parameters:

virtualJarInputStream - The virtual jar input stream to base the stream off of

bufferLength - The length of put to use

Method Details

read

public int read()
         throws IOException

Specified by:

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

closeCurrent

private void closeCurrent()
                   throws IOException

Close the current entry, and calculate the crc value.

Throws:

IOException - if any problems occur

bufferLocalFileHeader

private boolean bufferLocalFileHeader()
                               throws IOException

Buffer the content of the local file header for a single entry.

Returns:

true if the next local file header was buffered

Throws:

IOException - if any problems occur

bufferNextCentralFileHeader

private boolean bufferNextCentralFileHeader()
                                     throws IOException

Buffer the central file header record for a single entry.

Returns:

true if the next central file header was buffered

Throws:

IOException - if any problems occur

bufferCentralDirectoryEnd

private void bufferCentralDirectoryEnd()
                                throws IOException

Write the central file header records. This is repeated until all entries have been added to the central file header.

Throws:

IOException - if any problem occur

bufferInt

private void bufferInt(long i)

Buffer a 32-bit integer in little-endian

Parameters:

i - A long representation of a 32 bit int

bufferShort

private void bufferShort(int i)

Buffer a 16-bit short in little-endian

Parameters:

i - An int representation of a 16 bit short

buffer

private void buffer(byte b)

Buffer a single byte

Parameters:

b - The byte

buffer

private void buffer(byte[] bytes)

Buffer a byte array

Parameters:

bytes - The bytes