loci.poi.util

Class LongField

java.lang.Object

loci.poi.util.LongField

All Implemented Interfaces:

FixedField

public class LongField
extends Object
implements FixedField

representation of a long (16-bit) field at a fixed location within a byte array

Author:

Marc Johnson (mjohnson at apache dot org

Field Summary

Fields

Modifier and Type	Field and Description
private int	_offset
private long	_value

Constructor Summary

Constructors

Constructor and Description
LongField(int offset) construct the LongField with its offset into its containing byte array
LongField(int offset, byte[] data) Construct the LongField with its offset into its containing byte array and initialize its value from its byte array
LongField(int offset, long value) construct the LongField with its offset into its containing byte array and initialize its value
LongField(int offset, long value, byte[] data) construct the LongField with its offset into its containing byte array, initialize its value, and write the value to a byte array

Method Summary

Methods

Modifier and Type	Method and Description
long	get() get the LongField's current value
void	readFromBytes(byte[] data) set the value from its offset into an array of bytes
void	readFromStream(InputStream stream) set the value from an InputStream
void	set(long value) set the LongField's current value
void	set(long value, byte[] data) set the LongField's current value and write it to a byte array
String	toString() return the value as a String
void	writeToBytes(byte[] data) write the value out to an array of bytes at the appropriate offset

Methods inherited from class java.lang.Object

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

Field Detail

_value

private long _value

_offset

private final int _offset

Constructor Detail

LongField

public LongField(int offset)
          throws ArrayIndexOutOfBoundsException

construct the LongField with its offset into its containing byte array

Parameters:

offset - of the field within its byte array

Throws:

ArrayIndexOutOfBoundsException - if offset is negative

LongField

public LongField(int offset,
         long value)
          throws ArrayIndexOutOfBoundsException

construct the LongField with its offset into its containing byte array and initialize its value

Parameters:

offset - of the field within its byte array

value - the initial value

Throws:

ArrayIndexOutOfBoundsException - if offset is negative

LongField

public LongField(int offset,
         byte[] data)
          throws ArrayIndexOutOfBoundsException

Construct the LongField with its offset into its containing byte array and initialize its value from its byte array

Parameters:

offset - of the field within its byte array

data - the byte array to read the value from

Throws:

ArrayIndexOutOfBoundsException - if the offset is not within the range of 0..(data.length - 1)

LongField

public LongField(int offset,
         long value,
         byte[] data)
          throws ArrayIndexOutOfBoundsException

construct the LongField with its offset into its containing byte array, initialize its value, and write the value to a byte array

Parameters:

offset - of the field within its byte array

value - the initial value

data - the byte array to write the value to

Throws:

ArrayIndexOutOfBoundsException - if offset is negative

Method Detail

get

public long get()

get the LongField's current value

Returns:

current value

set

public void set(long value)

set the LongField's current value

Parameters:

value - to be set

set

public void set(long value,
       byte[] data)
         throws ArrayIndexOutOfBoundsException

set the LongField's current value and write it to a byte array

Parameters:

value - to be set

data - the byte array to write the value to

Throws:

ArrayIndexOutOfBoundsException - if the offset is out of range

readFromBytes

public void readFromBytes(byte[] data)
                   throws ArrayIndexOutOfBoundsException

set the value from its offset into an array of bytes

Specified by:

readFromBytes in interface FixedField

Parameters:

data - the byte array from which the value is to be read

Throws:

ArrayIndexOutOfBoundsException - if the offset is out of range

readFromStream

public void readFromStream(InputStream stream)
                    throws IOException,
                           LittleEndian.BufferUnderrunException

set the value from an InputStream

Specified by:

readFromStream in interface FixedField

Parameters:

stream - the InputStream from which the value is to be read

Throws:

LittleEndian.BufferUnderrunException - if there is not enough data available from the InputStream

IOException - if an IOException is thrown from reading the InputStream

writeToBytes

public void writeToBytes(byte[] data)
                  throws ArrayIndexOutOfBoundsException

write the value out to an array of bytes at the appropriate offset

Specified by:

writeToBytes in interface FixedField

Parameters:

data - the array of bytes to which the value is to be written

Throws:

ArrayIndexOutOfBoundsException - if the offset is out of range

toString

public String toString()

return the value as a String

Specified by:

toString in interface FixedField

Overrides:

toString in class Object

Returns:

the value as a String