org.apache.accumulo.core.data

Class ArrayByteSequence

java.lang.Object

org.apache.accumulo.core.data.ByteSequence

org.apache.accumulo.core.data.ArrayByteSequence

All Implemented Interfaces:

Serializable, Comparable<ByteSequence>

public class ArrayByteSequence
extends ByteSequence
implements Serializable

An implementation of ByteSequence that uses a backing byte array.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	data
protected int	length
protected int	offset

Constructor Summary

Constructors

Constructor and Description
ArrayByteSequence(byte[] data) Creates a new sequence.
ArrayByteSequence(byte[] data, int offset, int length) Creates a new sequence from a subsequence of the given byte array.
ArrayByteSequence(ByteBuffer buffer) Creates a new sequence based on a byte buffer.
ArrayByteSequence(String s) Creates a new sequence from the given string.

Method Summary

Modifier and Type	Method and Description
byte	byteAt(int i) Gets a byte within this sequence.
byte[]	getBackingArray() Gets the backing byte array for this sequence.
boolean	isBackedByArray() Determines whether this sequence is backed by a byte array.
int	length() Gets the length of this sequence.
int	offset() Gets the offset for this sequence.
ByteSequence	subSequence(int start, int end) Returns a portion of this sequence.
byte[]	toArray() Returns a byte array containing the bytes in this sequence.
String	toString()

Methods inherited from class org.apache.accumulo.core.data.ByteSequence

compareBytes, compareTo, equals, hashCode

Methods inherited from class java.lang.Object

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

Field Detail

data

protected byte[] data

offset

protected int offset

length

protected int length

Constructor Detail

ArrayByteSequence

public ArrayByteSequence(byte[] data)

Creates a new sequence. The given byte array is used directly as the backing array, so later changes made to the array reflect into the new sequence.

Parameters:

data - byte data

ArrayByteSequence

public ArrayByteSequence(byte[] data,
                         int offset,
                         int length)

Creates a new sequence from a subsequence of the given byte array. The given byte array is used directly as the backing array, so later changes made to the (relevant portion of the) array reflect into the new sequence.

Parameters:

data - byte data

offset - starting offset in byte array (inclusive)

length - number of bytes to include in sequence

Throws:

IllegalArgumentException - if the offset or length are out of bounds for the given byte array

ArrayByteSequence

public ArrayByteSequence(String s)

Creates a new sequence from the given string. The bytes are determined from the string using the default platform encoding.

Parameters:

s - string to represent as bytes

ArrayByteSequence

public ArrayByteSequence(ByteBuffer buffer)

Creates a new sequence based on a byte buffer. If the byte buffer has an array, that array (and the buffer's offset and limit) are used; otherwise, a new backing array is created and a relative bulk get is performed to transfer the buffer's contents (starting at its current position and not beyond its limit).

Parameters:

buffer - byte buffer

Method Detail

byteAt

public byte byteAt(int i)

Description copied from class: ByteSequence

Gets a byte within this sequence.

Specified by:

byteAt in class ByteSequence

Parameters:

i - index into sequence

Returns:

byte

getBackingArray

public byte[] getBackingArray()

Description copied from class: ByteSequence

Gets the backing byte array for this sequence.

Specified by:

getBackingArray in class ByteSequence

Returns:

byte array

isBackedByArray

public boolean isBackedByArray()

Description copied from class: ByteSequence

Determines whether this sequence is backed by a byte array.

Specified by:

isBackedByArray in class ByteSequence

Returns:

true if sequence is backed by a byte array

length

public int length()

Description copied from class: ByteSequence

Gets the length of this sequence.

Specified by:

length in class ByteSequence

Returns:

sequence length

offset

public int offset()

Description copied from class: ByteSequence

Gets the offset for this sequence. This value represents the starting point for the sequence in the backing array, if there is one.

Specified by:

offset in class ByteSequence

Returns:

offset (inclusive)

subSequence

public ByteSequence subSequence(int start,
                                int end)

Description copied from class: ByteSequence

Returns a portion of this sequence.

Specified by:

subSequence in class ByteSequence

Parameters:

start - index of subsequence start (inclusive)

end - index of subsequence end (exclusive)

toArray

public byte[] toArray()

Description copied from class: ByteSequence

Returns a byte array containing the bytes in this sequence. This method may copy the sequence data or may return a backing byte array directly.

Specified by:

toArray in class ByteSequence

Returns:

byte array

toString

public String toString()

Overrides:

toString in class Object