Package org.elasticsearch.core

Class CharArrays

java.lang.Object

org.elasticsearch.core.CharArrays

public final class CharArrays
extends Object

Helper class similar to Arrays to handle conversions for Char arrays

Method Summary

Modifier and Type	Method	Description
static boolean	charsBeginsWith(String prefix, char[] chars)	Tests if a char[] contains a sequence of characters that match the prefix.
static boolean	constantTimeEquals(char[] a, char[] b)	Constant time equality check of char arrays to avoid potential timing attacks.
static boolean	constantTimeEquals(String a, String b)	Constant time equality check of strings to avoid potential timing attacks.
static byte[]	toUtf8Bytes(char[] chars)	Encodes the provided char[] to a UTF-8 byte[].
static char[]	utf8BytesToChars(byte[] utf8Bytes)	Decodes the provided byte[] to a UTF-8 char[].

Methods inherited from class java.lang.Object

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

Method Details

utf8BytesToChars

public static char[] utf8BytesToChars(byte[] utf8Bytes)

Decodes the provided byte[] to a UTF-8 char[]. This is done while avoiding conversions to String. The provided byte[] is not modified by this method, so the caller needs to take care of clearing the value if it is sensitive.

toUtf8Bytes

public static byte[] toUtf8Bytes(char[] chars)

Encodes the provided char[] to a UTF-8 byte[]. This is done while avoiding conversions to String. The provided char[] is not modified by this method, so the caller needs to take care of clearing the value if it is sensitive.

charsBeginsWith

public static boolean charsBeginsWith(String prefix,
 char[] chars)

Tests if a char[] contains a sequence of characters that match the prefix. This is like String.startsWith(String) but does not require conversion of the char[] to a string.

constantTimeEquals

public static boolean constantTimeEquals(char[] a,
 char[] b)

Constant time equality check of char arrays to avoid potential timing attacks.

constantTimeEquals

public static boolean constantTimeEquals(String a,
 String b)

Constant time equality check of strings to avoid potential timing attacks.