Package java.util.jar

Class JarInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

java.util.zip.InflaterInputStream

java.util.zip.ZipInputStream

java.util.jar.JarInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class JarInputStream
extends ZipInputStream

The input stream from which the JAR file to be read may be fetched. It is used like the ZipInputStream.

See Also:

ZipInputStream

Field Summary

Fields

Modifier and Type	Field	Description
static int	CENATT
static int	CENATX
static int	CENCOM
static int	CENCRC
static int	CENDSK
static int	CENEXT
static int	CENFLG
static int	CENHDR
static int	CENHOW
static int	CENLEN
static int	CENNAM
static int	CENOFF
static long	CENSIG
static int	CENSIZ
static int	CENTIM
static int	CENVEM
static int	CENVER
static int	ENDCOM
static int	ENDHDR
static int	ENDOFF
static long	ENDSIG
static int	ENDSIZ
static int	ENDSUB
static int	ENDTOT
static int	EXTCRC
static int	EXTHDR
static int	EXTLEN
static long	EXTSIG
static int	EXTSIZ
static int	LOCCRC
static int	LOCEXT
static int	LOCFLG
static int	LOCHDR
static int	LOCHOW
static int	LOCLEN
static int	LOCNAM
static long	LOCSIG
static int	LOCSIZ
static int	LOCTIM
static int	LOCVER

Fields inherited from class java.util.zip.InflaterInputStream

buf, inf, len

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
JarInputStream(InputStream stream)	Constructs a new JarInputStream from an input stream.
JarInputStream(InputStream stream, boolean verify)	Constructs a new JarInputStream from an input stream.

Method Summary

Modifier and Type	Method	Description
protected ZipEntry	createZipEntry(String name)	creates a ZipEntry with the given name.
Manifest	getManifest()	Returns the Manifest object associated with this JarInputStream or null if no manifest entry exists.
ZipEntry	getNextEntry()	Returns the next ZipEntry contained in this stream or null if no more entries are present.
JarEntry	getNextJarEntry()	Returns the next JarEntry contained in this stream or null if no more entries are present.
int	read(byte[] buffer, int byteOffset, int byteCount)	Reads up to byteCount bytes of decompressed data and stores it in buffer starting at byteOffset.

Methods inherited from class java.util.zip.ZipInputStream

available, close, closeEntry

Methods inherited from class java.util.zip.InflaterInputStream

fill, mark, markSupported, read, reset, skip

Methods inherited from class java.io.InputStream

read

Methods inherited from class java.lang.Object

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

Field Details

LOCSIG

static final long LOCSIG

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Constant Field Values

EXTSIG

static final long EXTSIG

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Constant Field Values

CENSIG

static final long CENSIG

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Constant Field Values

ENDSIG

static final long ENDSIG

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Constant Field Values

LOCHDR

static final int LOCHDR

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Constant Field Values

EXTHDR

static final int EXTHDR

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Constant Field Values

CENHDR

static final int CENHDR

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Constant Field Values

ENDHDR

static final int ENDHDR

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Constant Field Values

LOCVER

static final int LOCVER

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Constant Field Values

LOCFLG

static final int LOCFLG

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Constant Field Values

LOCHOW

static final int LOCHOW

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Constant Field Values

LOCTIM

static final int LOCTIM

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Constant Field Values

LOCCRC

static final int LOCCRC

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Constant Field Values

LOCSIZ

static final int LOCSIZ

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Constant Field Values

LOCLEN

static final int LOCLEN

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LOCNAM

static final int LOCNAM

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LOCEXT

static final int LOCEXT

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Constant Field Values

EXTCRC

static final int EXTCRC

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EXTSIZ

static final int EXTSIZ

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EXTLEN

static final int EXTLEN

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Constant Field Values

CENVEM

static final int CENVEM

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Constant Field Values

CENVER

static final int CENVER

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Constant Field Values

CENFLG

static final int CENFLG

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Constant Field Values

CENHOW

static final int CENHOW

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Constant Field Values

CENTIM

static final int CENTIM

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Constant Field Values

CENCRC

static final int CENCRC

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Constant Field Values

CENSIZ

static final int CENSIZ

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Constant Field Values

CENLEN

static final int CENLEN

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Constant Field Values

CENNAM

static final int CENNAM

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Constant Field Values

CENEXT

static final int CENEXT

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CENCOM

static final int CENCOM

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CENDSK

static final int CENDSK

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CENATT

static final int CENATT

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CENATX

static final int CENATX

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CENOFF

static final int CENOFF

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Constant Field Values

ENDSUB

static final int ENDSUB

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Constant Field Values

ENDTOT

static final int ENDTOT

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Constant Field Values

ENDSIZ

static final int ENDSIZ

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ENDOFF

static final int ENDOFF

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ENDCOM

static final int ENDCOM

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Constant Field Values

Constructor Details

JarInputStream

public JarInputStream(InputStream stream,
boolean verify)
               throws IOException

Constructs a new JarInputStream from an input stream.

Parameters:

stream - the input stream containing the JAR file.

verify - if the file should be verified with a JarVerifier.

Throws:

IOException - If an error occurs reading entries from the input stream.

See Also:

ZipInputStream(InputStream)

JarInputStream

public JarInputStream(InputStream stream)
               throws IOException

Constructs a new JarInputStream from an input stream.

Parameters:

stream - the input stream containing the JAR file.

Throws:

IOException - If an error occurs reading entries from the input stream.

See Also:

ZipInputStream(InputStream)

Method Details

getManifest

public Manifest getManifest()

Returns the Manifest object associated with this JarInputStream or null if no manifest entry exists.

Returns:

the MANIFEST specifying the contents of the JAR file.

getNextJarEntry

public JarEntry getNextJarEntry()
                         throws IOException

Returns the next JarEntry contained in this stream or null if no more entries are present.

Returns:

the next JAR entry.

Throws:

IOException - if an error occurs while reading the entry.

read

public int read(byte[] buffer,
int byteOffset,
int byteCount)
         throws IOException

Reads up to byteCount bytes of decompressed data and stores it in buffer starting at byteOffset. Returns the number of uncompressed bytes read.

Overrides:

read in class ZipInputStream

Throws:

IOException - if an IOException occurs.

getNextEntry

public ZipEntry getNextEntry()
                      throws IOException

Returns the next ZipEntry contained in this stream or null if no more entries are present.

Overrides:

getNextEntry in class ZipInputStream

Returns:

the next extracted ZIP entry.

Throws:

IOException - if an error occurs while reading the entry.

createZipEntry

protected ZipEntry createZipEntry(String name)

Description copied from class: ZipInputStream

creates a ZipEntry with the given name.

Overrides:

createZipEntry in class ZipInputStream

Parameters:

name - the name of the entry.

Returns:

the created ZipEntry.