org.ardverk.collection

Class CharArrayKeyAnalyzer

java.lang.Object

org.ardverk.collection.AbstractKeyAnalyzer<char[]>

org.ardverk.collection.CharArrayKeyAnalyzer

All Implemented Interfaces:

java.io.Serializable, java.util.Comparator<char[]>, KeyAnalyzer<char[]>

public class CharArrayKeyAnalyzer
extends AbstractKeyAnalyzer<char[]>

An KeyAnalyzer for char[]s

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static CharArrayKeyAnalyzer	INSTANCE A singleton instance of CharArrayKeyAnalyzer
static int	LENGTH The number of bits per Character

Fields inherited from interface org.ardverk.collection.KeyAnalyzer

EQUAL_BIT_KEY, NULL_BIT_KEY, OUT_OF_BOUNDS_BIT_KEY

Constructor Summary

Constructors

Constructor and Description
CharArrayKeyAnalyzer()

Method Summary

Methods

Modifier and Type	Method and Description
int	bitIndex(char[] key, int offsetInBits, int lengthInBits, char[] other, int otherOffsetInBits, int otherLengthInBits) Returns the n-th different bit between key and found.
int	bitsPerElement() Returns the number of bits per element in the key.
boolean	isBitSet(char[] key, int bitIndex, int lengthInBits) Returns whether or not a bit is set
boolean	isPrefix(char[] prefix, int offsetInBits, int lengthInBits, char[] key) Determines whether or not the given prefix (from offset to length) is a prefix of the given key.
int	lengthInBits(char[] key) Returns the length of the Key in bits.

Methods inherited from class org.ardverk.collection.AbstractKeyAnalyzer

compare

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Field Detail

INSTANCE

public static final CharArrayKeyAnalyzer INSTANCE

A singleton instance of CharArrayKeyAnalyzer

LENGTH

public static final int LENGTH

The number of bits per Character

See Also:

Constant Field Values

Constructor Detail

CharArrayKeyAnalyzer

public CharArrayKeyAnalyzer()

Method Detail

bitsPerElement

public int bitsPerElement()

Returns the number of bits per element in the key. This is only useful for variable-length keys, such as Strings.

lengthInBits

public int lengthInBits(char[] key)

Returns the length of the Key in bits.

bitIndex

public int bitIndex(char[] key,
           int offsetInBits,
           int lengthInBits,
           char[] other,
           int otherOffsetInBits,
           int otherLengthInBits)

Returns the n-th different bit between key and found. This starts the comparison in key at 'keyStart' and goes for 'keyLength' bits, and compares to the found key starting at 'foundStart' and going for 'foundLength' bits.

isBitSet

public boolean isBitSet(char[] key,
               int bitIndex,
               int lengthInBits)

Returns whether or not a bit is set

isPrefix

public boolean isPrefix(char[] prefix,
               int offsetInBits,
               int lengthInBits,
               char[] key)

Determines whether or not the given prefix (from offset to length) is a prefix of the given key.