com.ibm.icu.util

Class ByteArrayWrapper

java.lang.Object

com.ibm.icu.util.ByteArrayWrapper

All Implemented Interfaces:

Comparable<ByteArrayWrapper>

Direct Known Subclasses:

RawCollationKey

public class ByteArrayWrapper
extends Object
implements Comparable<ByteArrayWrapper>

A simple utility class to wrap a byte array.

Generally passed as an argument object into a method. The method takes responsibility of writing into the internal byte array and increasing its size when necessary.

Field Summary

Fields

Modifier and Type	Field and Description
byte[]	bytes Internal byte array.
int	size Size of the internal byte array used.

Constructor Summary

Constructors

Constructor and Description
ByteArrayWrapper() Construct a new ByteArrayWrapper with no data.
ByteArrayWrapper(byte[] bytesToAdopt, int size) Construct a new ByteArrayWrapper from a byte array and size
ByteArrayWrapper(ByteBuffer source) Construct a new ByteArrayWrapper from the contents of a ByteBuffer.

Method Summary

Modifier and Type	Method and Description
ByteArrayWrapper	append(byte[] src, int start, int limit) Appends the internal byte array from offset size with the contents of src from offset start to limit.
int	compareTo(ByteArrayWrapper other) Compare this object to another ByteArrayWrapper, which must not be null.
ByteArrayWrapper	ensureCapacity(int capacity) Ensure that the internal byte array is at least of length capacity.
boolean	equals(Object other) Return true if the bytes in each wrapper are equal.
int	hashCode() Return the hashcode.
byte[]	releaseBytes() Releases the internal byte array to the caller, resets the internal byte array to null and its size to 0.
ByteArrayWrapper	set(byte[] src, int start, int limit) Set the internal byte array from offset 0 to (limit - start) with the contents of src from offset start to limit.
String	toString() Returns string value for debugging

Methods inherited from class java.lang.Object

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

Field Detail

bytes

public byte[] bytes

Internal byte array.

size

public int size

Size of the internal byte array used. Different from bytes.length, size will be <= bytes.length. Semantics of size is similar to java.util.Vector.size().

Constructor Detail

ByteArrayWrapper

public ByteArrayWrapper()

Construct a new ByteArrayWrapper with no data.

ByteArrayWrapper

public ByteArrayWrapper(byte[] bytesToAdopt,
                        int size)

Construct a new ByteArrayWrapper from a byte array and size

Parameters:

bytesToAdopt - the byte array to adopt

size - the length of valid data in the byte array

Throws:

IndexOutOfBoundsException - if bytesToAdopt == null and size != 0, or size < 0, or size > bytesToAdopt.length.

ByteArrayWrapper

public ByteArrayWrapper(ByteBuffer source)

Construct a new ByteArrayWrapper from the contents of a ByteBuffer.

Parameters:

source - the ByteBuffer from which to get the data.

Method Detail

ensureCapacity

public ByteArrayWrapper ensureCapacity(int capacity)

Ensure that the internal byte array is at least of length capacity. If the byte array is null or its length is less than capacity, a new byte array of length capacity will be allocated. The contents of the array (between 0 and size) remain unchanged.

Parameters:

capacity - minimum length of internal byte array.

Returns:

this ByteArrayWrapper

set

public final ByteArrayWrapper set(byte[] src,
                                  int start,
                                  int limit)

Set the internal byte array from offset 0 to (limit - start) with the contents of src from offset start to limit. If the byte array is null or its length is less than capacity, a new byte array of length (limit - start) will be allocated. This resets the size of the internal byte array to (limit - start).

Parameters:

src - source byte array to copy from

start - start offset of src to copy from

limit - end + 1 offset of src to copy from

Returns:

this ByteArrayWrapper

append

public final ByteArrayWrapper append(byte[] src,
                                     int start,
                                     int limit)

Appends the internal byte array from offset size with the contents of src from offset start to limit. This increases the size of the internal byte array to (size + limit - start).

Parameters:

src - source byte array to copy from

start - start offset of src to copy from

limit - end + 1 offset of src to copy from

Returns:

this ByteArrayWrapper

releaseBytes

public final byte[] releaseBytes()

Releases the internal byte array to the caller, resets the internal byte array to null and its size to 0.

Returns:

internal byte array.

toString

public String toString()

Returns string value for debugging

Overrides:

toString in class Object

Returns:

a printable representation of this object.

equals

public boolean equals(Object other)

Return true if the bytes in each wrapper are equal.

Overrides:

equals in class Object

Parameters:

other - the object to compare to.

Returns:

true if the two objects are equal.

See Also:

Object.hashCode()

hashCode

public int hashCode()

Return the hashcode.

Overrides:

hashCode in class Object

Returns:

the hashcode.

See Also:

Object.equals(java.lang.Object)

compareTo

public int compareTo(ByteArrayWrapper other)

Compare this object to another ByteArrayWrapper, which must not be null.

Specified by:

compareTo in interface Comparable<ByteArrayWrapper>

Parameters:

other - the object to compare to.

Returns:

a value <0, 0, or >0 as this compares less than, equal to, or greater than other.

Throws:

ClassCastException - if the other object is not a ByteArrayWrapper