Package org.opencms.jlan

Class CmsByteBuffer

java.lang.Object

org.opencms.jlan.CmsByteBuffer

public class CmsByteBuffer
extends Object

Byte buffer class which expands dynamically if bytes are written to its end.

Constructor Summary

Constructors

Constructor	Description
CmsByteBuffer()	Creates a new instance.
CmsByteBuffer(int capacity)	Creates a new instance with a given initial capacity.

Method Summary

Modifier and Type	Method	Description
int	getCapacity()	Gets the current length of the internal byte buffer, which is the number of bytes this buffer can contain before a new buffer is allocated.
void	readBytes(byte[] dest, int srcStart, int destStart, int len)	Transfers bytes from this buffer to a target byte array.
int	size()	Returns the logical size of this buffer (which may be less than its capacity).
String	toString()
void	truncate(int size)	Changes the logical size of this buffer.
void	writeBytes(byte[] src, int srcStart, int destStart, int len)	Writes some bytes to this buffer, expanding the buffer if necessary.

Methods inherited from class java.lang.Object

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

Constructor Details

CmsByteBuffer

public CmsByteBuffer()

Creates a new instance.

CmsByteBuffer

public CmsByteBuffer(int capacity)

Creates a new instance with a given initial capacity.

Parameters:

capacity - the initial capacity

Method Details

getCapacity

public int getCapacity()

Gets the current length of the internal byte buffer, which is the number of bytes this buffer can contain before a new buffer is allocated.

Returns:

the current length of the internal buffer

readBytes

public void readBytes(byte[] dest,
 int srcStart,
 int destStart,
 int len)

Transfers bytes from this buffer to a target byte array.

Parameters:

dest - the byte array to which the bytes should be transferred

srcStart - the start index in this buffer

destStart - the start index in the destination buffer

len - the number of bytes to transfer

size

public int size()

Returns the logical size of this buffer (which may be less than its capacity).

Returns:

the buffer size

toString

public String toString()

Overrides:

toString in class Object

See Also:

• Object.toString()

truncate

public void truncate(int size)

Changes the logical size of this buffer.

If the size is larger than the current size, the new space will be filled with 0s. Note that the internal byte buffer will not be shrunk if the size is smaller than the current size.

Parameters:

size - the new size

writeBytes

public void writeBytes(byte[] src,
 int srcStart,
 int destStart,
 int len)

Writes some bytes to this buffer, expanding the buffer if necessary.

Parameters:

src - the source from which to write the bytes

srcStart - the start index in the source array

destStart - the start index in this buffer

len - the number of bytes to write