org.apache.accumulo.core.data

Class ByteSequence

java.lang.Object

org.apache.accumulo.core.data.ByteSequence

All Implemented Interfaces:

Comparable<ByteSequence>

Direct Known Subclasses:

ArrayByteSequence

public abstract class ByteSequence
extends Object
implements Comparable<ByteSequence>

A sequence of bytes.

Constructor Summary

Constructors

Constructor and Description
ByteSequence()

Method Summary

Modifier and Type	Method and Description
abstract byte	byteAt(int i) Gets a byte within this sequence.
static int	compareBytes(ByteSequence bs1, ByteSequence bs2) Compares the two given byte sequences, byte by byte, returning a negative, zero, or positive result if the first sequence is less than, equal to, or greater than the second.
int	compareTo(ByteSequence obs)
boolean	equals(Object o)
abstract byte[]	getBackingArray() Gets the backing byte array for this sequence.
int	hashCode()
abstract boolean	isBackedByArray() Determines whether this sequence is backed by a byte array.
abstract int	length() Gets the length of this sequence.
abstract int	offset() Gets the offset for this sequence.
abstract ByteSequence	subSequence(int start, int end) Returns a portion of this sequence.
abstract byte[]	toArray() Returns a byte array containing the bytes in this sequence.

Methods inherited from class java.lang.Object

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

Constructor Detail

ByteSequence

public ByteSequence()

Method Detail

byteAt

public abstract byte byteAt(int i)

Gets a byte within this sequence.

Parameters:

i - index into sequence

Returns:

byte

Throws:

IllegalArgumentException - if i is out of range

length

public abstract int length()

Gets the length of this sequence.

Returns:

sequence length

subSequence

public abstract ByteSequence subSequence(int start,
                                         int end)

Returns a portion of this sequence.

Parameters:

start - index of subsequence start (inclusive)

end - index of subsequence end (exclusive)

toArray

public abstract byte[] toArray()

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.

Returns:

byte array

isBackedByArray

public abstract boolean isBackedByArray()

Determines whether this sequence is backed by a byte array.

Returns:

true if sequence is backed by a byte array

getBackingArray

public abstract byte[] getBackingArray()

Gets the backing byte array for this sequence.

Returns:

byte array

offset

public abstract int offset()

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

Returns:

offset (inclusive)

compareBytes

public static int compareBytes(ByteSequence bs1,
                               ByteSequence bs2)

Compares the two given byte sequences, byte by byte, returning a negative, zero, or positive result if the first sequence is less than, equal to, or greater than the second. The comparison is performed starting with the first byte of each sequence, and proceeds until a pair of bytes differs, or one sequence runs out of byte (is shorter). A shorter sequence is considered less than a longer one.

Parameters:

bs1 - first byte sequence to compare

bs2 - second byte sequence to compare

Returns:

comparison result

compareTo

public int compareTo(ByteSequence obs)

Specified by:

compareTo in interface Comparable<ByteSequence>

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object