org.jboss.vfs

Class VirtualJarFileInputStream

java.lang.Object

java.io.InputStream

org.jboss.vfs.VirtualJarFileInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public class VirtualJarFileInputStream
extends java.io.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 and Description
private static class	VirtualJarFileInputStream.ByteBuffer
private class	VirtualJarFileInputStream.ProcessedEntry
private static class	VirtualJarFileInputStream.State Basic state machine that will allow the process to transition between the different process states.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and 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 and 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 java.io.InputStream

available, mark, markSupported, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Field Detail

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 java.util.List<VirtualJarFileInputStream.ProcessedEntry> processedEntries

currentEntry

private VirtualJarFileInputStream.ProcessedEntry currentEntry

buffer

private final VirtualJarFileInputStream.ByteBuffer buffer

crc

private final java.util.zip.CRC32 crc

currentCentralEntryIdx

private int currentCentralEntryIdx

centralOffset

private long centralOffset

totalRead

private long totalRead

Constructor Detail

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 Detail

read

public int read()
         throws java.io.IOException

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

closeCurrent

private void closeCurrent()
                   throws java.io.IOException

Close the current entry, and calculate the crc value.

Throws:

java.io.IOException - if any problems occur

bufferLocalFileHeader

private boolean bufferLocalFileHeader()
                               throws java.io.IOException

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

Returns:

true if the next local file header was buffered

Throws:

java.io.IOException - if any problems occur

bufferNextCentralFileHeader

private boolean bufferNextCentralFileHeader()
                                     throws java.io.IOException

Buffer the central file header record for a single entry.

Returns:

true if the next central file header was buffered

Throws:

java.io.IOException - if any problems occur

bufferCentralDirectoryEnd

private void bufferCentralDirectoryEnd()
                                throws java.io.IOException

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

Throws:

java.io.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