java.util.jar
Class JarInputStream

java.lang.Object
  extended by java.io.InputStream
      extended by java.io.FilterInputStream
          extended by java.util.zip.InflaterInputStream
              extended by java.util.zip.ZipInputStream
                  extended by java.util.jar.JarInputStream
All Implemented Interfaces:
Closeable

public class JarInputStream
extends ZipInputStream

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

Since:
1.2

Field Summary
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
JarInputStream(InputStream in)
          Creates a new JarInputStream and tries to read the manifest.
JarInputStream(InputStream in, boolean verify)
          Creates a new JarInputStream and tries to read the manifest.
 
Method Summary
protected  ZipEntry createZipEntry(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.
 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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LOCVER

public static final int LOCVER
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LOCFLG

public static final int LOCFLG
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LOCHOW

public static final int LOCHOW
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LOCTIM

public static final int LOCTIM
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LOCCRC

public static final int LOCCRC
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LOCSIZ

public static final int LOCSIZ
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LOCLEN

public static final int LOCLEN
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LOCNAM

public static final int LOCNAM
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LOCEXT

public static final int LOCEXT
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EXTSIG

public static final long EXTSIG
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EXTHDR

public static final int EXTHDR
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EXTCRC

public static final int EXTCRC
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EXTSIZ

public static final int EXTSIZ
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EXTLEN

public static final int EXTLEN
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CENSIG

public static final long CENSIG
See Also:
Constant Field Values

CENHDR

public static final int CENHDR
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CENVEM

public static final int CENVEM
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CENVER

public static final int CENVER
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CENFLG

public static final int CENFLG
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CENHOW

public static final int CENHOW
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CENTIM

public static final int CENTIM
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CENCRC

public static final int CENCRC
See Also:
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CENSIZ

public static final int CENSIZ
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CENLEN

public static final int CENLEN
See Also:
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CENNAM

public static final int CENNAM
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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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ENDSIG

public static final long ENDSIG
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ENDHDR

public static final int ENDHDR
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ENDSUB

public static final int ENDSUB
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ENDTOT

public static final int ENDTOT
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ENDSIZ

public static final int ENDSIZ
See Also:
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ENDOFF

public static final int ENDOFF
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ENDCOM

public static final int ENDCOM
See Also:
Constant Field Values
Constructor Detail

JarInputStream

public JarInputStream(InputStream in)
               throws 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:
IOException - when an error occurs when opening or reading

JarInputStream

public JarInputStream(InputStream in,
                      boolean verify)
               throws 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:
IOException - when an error occurs when opening or reading
Method Detail

createZipEntry

protected ZipEntry createZipEntry(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 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 ZipEntry getNextEntry()
                      throws 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 ZipInputStream
Throws:
IOException - if an IO error occurs when reading the entry

getNextJarEntry

public JarEntry getNextJarEntry()
                         throws IOException
Returns the next jar entry or null when there are no more entries.

Throws:
IOException - if an IO error occurs when reading the entry

read

public int read(byte[] buf,
                int off,
                int len)
         throws IOException
XXX

Overrides:
read in class ZipInputStream
Parameters:
buf - XXX
off - XXX
len - XXX
Returns:
XXX
Throws:
IOException - XXX