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
void	closeEntry()	Closes the current zip entry and prepares to read the next entry.
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

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 Detail

LOCSIG

public static final long LOCSIG

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Constant Field Values

EXTSIG

public static final long EXTSIG

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Constant Field Values

CENSIG

public static final long CENSIG

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Constant Field Values

ENDSIG

public static final long ENDSIG

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Constant Field Values

LOCHDR

public static final int LOCHDR

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Constant Field Values

EXTHDR

public static final int EXTHDR

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Constant Field Values

CENHDR

public static final int CENHDR

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Constant Field Values

ENDHDR

public static final int ENDHDR

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Constant Field Values

LOCVER

public static final int LOCVER

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Constant Field Values

LOCFLG

public static final int LOCFLG

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Constant Field Values

LOCHOW

public static final int LOCHOW

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Constant Field Values

LOCTIM

public static final int LOCTIM

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Constant Field Values

LOCCRC

public static final int LOCCRC

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Constant Field Values

LOCSIZ

public static final int LOCSIZ

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Constant Field Values

LOCLEN

public static final int LOCLEN

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Constant Field Values

LOCNAM

public static final int LOCNAM

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Constant Field Values

LOCEXT

public static final int LOCEXT

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Constant Field Values

EXTCRC

public static final int EXTCRC

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Constant Field Values

EXTSIZ

public static final int EXTSIZ

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Constant Field Values

EXTLEN

public static final int EXTLEN

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Constant Field Values

CENVEM

public static final int CENVEM

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Constant Field Values

CENVER

public static final int CENVER

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Constant Field Values

CENFLG

public static final int CENFLG

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Constant Field Values

CENHOW

public static final int CENHOW

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Constant Field Values

CENTIM

public static final int CENTIM

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Constant Field Values

CENCRC

public static final int CENCRC

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Constant Field Values

CENSIZ

public static final int CENSIZ

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Constant Field Values

CENLEN

public static final int CENLEN

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Constant Field Values

CENNAM

public static final int CENNAM

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Constant Field Values

CENEXT

public static final int CENEXT

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Constant Field Values

CENCOM

public static final int CENCOM

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Constant Field Values

CENDSK

public static final int CENDSK

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Constant Field Values

CENATT

public static final int CENATT

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Constant Field Values

CENATX

public static final int CENATX

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Constant Field Values

CENOFF

public static final int CENOFF

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Constant Field Values

ENDSUB

public static final int ENDSUB

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Constant Field Values

ENDTOT

public static final int ENDTOT

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Constant Field Values

ENDSIZ

public static final int ENDSIZ

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Constant Field Values

ENDOFF

public static final int ENDOFF

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Constant Field Values

ENDCOM

public static final int ENDCOM

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Constant Field Values

Constructor Detail

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 Detail

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.

closeEntry

public void closeEntry()
                throws IOException

Description copied from class: ZipInputStream

Closes the current zip entry and prepares to read the next entry.

Overrides:

closeEntry in class ZipInputStream

Throws:

IOException - if an IOException occurs.

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.