com.alipay.sofa.ark.loader.jar

Class JarFile

java.lang.Object

java.util.zip.ZipFile

java.util.jar.JarFile

com.alipay.sofa.ark.loader.jar.JarFile

All Implemented Interfaces:

Closeable, AutoCloseable

public class JarFile
extends JarFile

Extended variant of JarFile that behaves in the same way but offers the following additional functionality.

• A nested JarFile can be obtained based on any directory entry.
• A nested JarFile can be obtained for embedded JAR files (as long as their entry is not compressed).

Author:

Phillip Webb

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.ZipFile

OPEN_DELETE, OPEN_READ

Constructor Summary

Constructors

Constructor and Description
JarFile(File file) Create a new JarFile backed by the specified file.

Method Summary

Modifier and Type	Method and Description
void	clearCache()
void	close()
boolean	containsEntry(String name)
Enumeration<JarEntry>	entries()
ZipEntry	getEntry(String name)
InputStream	getInputStream(ZipEntry ze)
InputStream	getInputStream(ZipEntry ze, RandomAccessData.ResourceAccess access)
JarEntry	getJarEntry(String name)
Manifest	getManifest()
String	getName()
JarFile	getNestedJarFile(JarEntry entry) Return a nested JarFile loaded from the specified entry.
JarFile	getNestedJarFile(ZipEntry entry) Return a nested JarFile loaded from the specified entry.
protected String	getPathFromRoot()
Properties	getPomProperties()
protected RandomAccessDataFile	getRootJarFile()
URL	getUrl() Return a URL that can be used to access this JAR file.
static void	registerUrlProtocolHandler() Register a 'java.protocol.handler.pkgs' property so that a URLStreamHandler will be located to deal with jar URLs.
int	size()
String	toString()

Methods inherited from class java.util.jar.JarFile

stream

Methods inherited from class java.util.zip.ZipFile

finalize, getComment

Methods inherited from class java.lang.Object

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

Field Detail

LOCSIG

public static final long LOCSIG

See Also:

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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CENCOM

public static final int CENCOM

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CENDSK

public static final int CENDSK

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CENATT

public static final int CENATT

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CENATX

public static final int CENATX

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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

See Also:

Constant Field Values

Constructor Detail

JarFile

public JarFile(File file)
        throws IOException

Create a new JarFile backed by the specified file.

Parameters:

file - the root jar file

Throws:

IOException - if the file cannot be read

Method Detail

getRootJarFile

protected final RandomAccessDataFile getRootJarFile()

getManifest

public Manifest getManifest()
                     throws IOException

Overrides:

getManifest in class JarFile

Throws:

IOException

getPomProperties

public Properties getPomProperties()
                            throws IOException

Throws:

IOException

entries

public Enumeration<JarEntry> entries()

Overrides:

entries in class JarFile

getJarEntry

public JarEntry getJarEntry(String name)

Overrides:

getJarEntry in class JarFile

containsEntry

public boolean containsEntry(String name)

getEntry

public ZipEntry getEntry(String name)

Overrides:

getEntry in class JarFile

getInputStream

public InputStream getInputStream(ZipEntry ze)
                           throws IOException

Overrides:

getInputStream in class JarFile

Throws:

IOException

getInputStream

public InputStream getInputStream(ZipEntry ze,
                                  RandomAccessData.ResourceAccess access)
                           throws IOException

Throws:

IOException

getNestedJarFile

public JarFile getNestedJarFile(ZipEntry entry)
                         throws IOException

Return a nested JarFile loaded from the specified entry.

Parameters:

entry - the zip entry

Returns:

a JarFile for the entry

Throws:

IOException - if the nested jar file cannot be read

getNestedJarFile

public JarFile getNestedJarFile(JarEntry entry)
                         throws IOException

Return a nested JarFile loaded from the specified entry.

Parameters:

entry - the zip entry

Returns:

a JarFile for the entry

Throws:

IOException - if the nested jar file cannot be read

size

public int size()

Overrides:

size in class ZipFile

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Overrides:

close in class ZipFile

Throws:

IOException

getUrl

public URL getUrl()
           throws MalformedURLException

Return a URL that can be used to access this JAR file. NOTE: the specified URL cannot be serialized and or cloned.

Returns:

the URL

Throws:

MalformedURLException - if the URL is malformed

toString

public String toString()

Overrides:

toString in class Object

getName

public String getName()

Overrides:

getName in class ZipFile

clearCache

public void clearCache()

getPathFromRoot

protected String getPathFromRoot()

registerUrlProtocolHandler

public static void registerUrlProtocolHandler()

Register a 'java.protocol.handler.pkgs' property so that a URLStreamHandler will be located to deal with jar URLs.