org.apache.tools.zip
Class ZipLong

java.lang.Object
  org.apache.tools.zip.ZipLong

All Implemented Interfaces:

java.lang.Cloneable

public final class ZipLong
extends java.lang.Object
implements java.lang.Cloneable

Utility class that represents a four byte integer with conversion rules for the big endian byte order of ZIP files.

Field Summary

static ZipLong	CFH_SIG Central File Header Signature
static ZipLong	DD_SIG Data Descriptor signature
static ZipLong	LFH_SIG Local File Header Signature

Constructor Summary

ZipLong(byte[] bytes)
Create instance from bytes.

ZipLong(byte[] bytes, int offset)
Create instance from the four bytes starting at offset.

ZipLong(long value)
Create instance from a number.

Method Summary

java.lang.Object	clone()
boolean	equals(java.lang.Object o) Override to make two instances with same value equal.
byte[]	getBytes() Get value as four bytes in big endian byte order.
static byte[]	getBytes(long value) Get value as four bytes in big endian byte order.
long	getValue() Get value as Java long.
static long	getValue(byte[] bytes) Helper method to get the value as a Java long from a four-byte array
static long	getValue(byte[] bytes, int offset) Helper method to get the value as a Java long from four bytes starting at given array offset
int	hashCode() Override to make two instances with same value equal.
java.lang.String	toString()

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

CFH_SIG

public static final ZipLong CFH_SIG

Central File Header Signature

LFH_SIG

public static final ZipLong LFH_SIG

Local File Header Signature

DD_SIG

public static final ZipLong DD_SIG

Data Descriptor signature

Constructor Detail

ZipLong

public ZipLong(long value)

Create instance from a number.

Parameters:

value - the long to store as a ZipLong

Since:

1.1

ZipLong

public ZipLong(byte[] bytes)

Create instance from bytes.

Parameters:

bytes - the bytes to store as a ZipLong

Since:

1.1

ZipLong

public ZipLong(byte[] bytes,
               int offset)

Create instance from the four bytes starting at offset.

Parameters:

bytes - the bytes to store as a ZipLong

offset - the offset to start

Since:

1.1

Method Detail

getBytes

public byte[] getBytes()

Get value as four bytes in big endian byte order.

Returns:

value as four bytes in big endian order

Since:

1.1

getValue

public long getValue()

Get value as Java long.

Returns:

value as a long

Since:

1.1

getBytes

public static byte[] getBytes(long value)

Get value as four bytes in big endian byte order.

Parameters:

value - the value to convert

Returns:

value as four bytes in big endian byte order

getValue

public static long getValue(byte[] bytes,
                            int offset)

Helper method to get the value as a Java long from four bytes starting at given array offset

Parameters:

bytes - the array of bytes

offset - the offset to start

Returns:

the corresponding Java long value

getValue

public static long getValue(byte[] bytes)

Helper method to get the value as a Java long from a four-byte array

Parameters:

bytes - the array of bytes

Returns:

the corresponding Java long value

equals

public boolean equals(java.lang.Object o)

Override to make two instances with same value equal.

Overrides:

equals in class java.lang.Object

Parameters:

o - an object to compare

Returns:

true if the objects are equal

Since:

1.1

hashCode

public int hashCode()

Override to make two instances with same value equal.

Overrides:

hashCode in class java.lang.Object

Returns:

the value stored in the ZipLong

Since:

1.1

clone

public java.lang.Object clone()

Overrides:

clone in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object