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:

java.io.Closeable, java.lang.AutoCloseable

public class JarInputStream
extends java.util.zip.ZipInputStream

InputStream for reading jar files. XXX - verification of the signatures in the Manifest file is not yet implemented.

Since:

1.2

Field Summary

Fields

Modifier and Type	Field and 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 and Description
JarInputStream(java.io.InputStream in) Creates a new JarInputStream and tries to read the manifest.
JarInputStream(java.io.InputStream in, boolean verify) Creates a new JarInputStream and tries to read the manifest.

Method Summary

Methods

Modifier and Type	Method and Description
protected java.util.zip.ZipEntry	createZipEntry(java.lang.String name) Creates a JarEntry for a particular name and consults the manifest for the Attributes of the entry.
Manifest	getManifest() Returns the Manifest for the jar file or null if there was no Manifest.
java.util.zip.ZipEntry	getNextEntry() Returns the next entry or null when there are no more entries.
JarEntry	getNextJarEntry() Returns the next jar entry or null when there are no more entries.
int	read(byte[] buf, int off, int len) XXX

Methods inherited from class java.util.zip.ZipInputStream

available, close, closeEntry, read

Methods inherited from class java.util.zip.InflaterInputStream

fill, mark, markSupported, reset, skip

Methods inherited from class java.io.FilterInputStream

read

Methods inherited from class java.lang.Object

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

Field Detail

LOCHDR

public static final int LOCHDR

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Constant Field Values

LOCSIG

public static final long LOCSIG

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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

EXTSIG

public static final long EXTSIG

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Constant Field Values

EXTHDR

public static final int EXTHDR

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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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EXTLEN

public static final int EXTLEN

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Constant Field Values

CENSIG

public static final long CENSIG

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Constant Field Values

CENHDR

public static final int CENHDR

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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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CENOFF

public static final int CENOFF

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Constant Field Values

ENDSIG

public static final long ENDSIG

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Constant Field Values

ENDHDR

public static final int ENDHDR

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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(java.io.InputStream in)
               throws java.io.IOException

Creates a new JarInputStream and tries to read the manifest. If such a manifest is present the JarInputStream tries to verify all the entry signatures while reading.

Parameters:

in - InputStream to read the jar from

Throws:

java.io.IOException - when an error occurs when opening or reading

JarInputStream

public JarInputStream(java.io.InputStream in,
              boolean verify)
               throws java.io.IOException

Creates a new JarInputStream and tries to read the manifest. If such a manifest is present and verify is true, the JarInputStream tries to verify all the entry signatures while reading.

Parameters:

in - InputStream to read the jar from

verify - whether or not to verify the manifest entries

Throws:

java.io.IOException - when an error occurs when opening or reading

Method Detail

createZipEntry

protected java.util.zip.ZipEntry createZipEntry(java.lang.String name)

Creates a JarEntry for a particular name and consults the manifest for the Attributes of the entry. Used by ZipEntry.getNextEntry()

Overrides:

createZipEntry in class java.util.zip.ZipInputStream

Parameters:

name - the name of the new entry

getManifest

public Manifest getManifest()

Returns the Manifest for the jar file or null if there was no Manifest.

getNextEntry

public java.util.zip.ZipEntry getNextEntry()
                                    throws java.io.IOException

Returns the next entry or null when there are no more entries. Does actually return a JarEntry, if you don't want to cast it yourself use getNextJarEntry(). Does not return any entries found at the beginning of the ZipFile that are special (those that start with "META-INF/").

Overrides:

getNextEntry in class java.util.zip.ZipInputStream

Throws:

java.io.IOException - if an IO error occurs when reading the entry

getNextJarEntry

public JarEntry getNextJarEntry()
                         throws java.io.IOException

Returns the next jar entry or null when there are no more entries.

Throws:

java.io.IOException - if an IO error occurs when reading the entry

read

public int read(byte[] buf,
       int off,
       int len)
         throws java.io.IOException

XXX

Overrides:

read in class java.util.zip.ZipInputStream

Parameters:

buf - XXX

off - XXX

len - XXX

Returns:

XXX

Throws:

java.io.IOException - XXX