com.dropbox.core.util

Class StringUtil

java.lang.Object

com.dropbox.core.util.StringUtil

public class StringUtil
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	Base64Digits
static java.lang.String	UrlSafeBase64Digits
static java.nio.charset.Charset	UTF8

Constructor Summary

Constructors

Constructor and Description
StringUtil()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	base64Encode(byte[] data)
static java.lang.String	base64EncodeGeneric(java.lang.String digits, byte[] data)
static java.lang.String	binaryToHex(byte[] data)
static java.lang.String	binaryToHex(byte[] data, int offset, int length) Convert a string of binary bytes to the equivalent hexadecimal string.
static char	hexDigit(int i)
static java.lang.String	javaQuotedLiteral(java.lang.String value) Given a string, returns the representation of that string as a Java string literal.
static java.lang.String	javaQuotedLiterals(java.lang.Iterable<java.lang.String> value)
static java.lang.String	javaQuotedLiterals(java.lang.String[] value)
static java.lang.String	join(java.util.Collection<java.lang.String> strings, java.lang.String delimiter)
static java.lang.String	jq(java.lang.Iterable<java.lang.String> value) Shorthand for javaQuotedLiterals(java.lang.String[]).
static java.lang.String	jq(java.lang.String value) Shorthand for javaQuotedLiteral(java.lang.String).
static java.lang.String	jq(java.lang.String[] value) Shorthand for javaQuotedLiterals(java.lang.String[]).
static boolean	secureStringEquals(java.lang.String a, java.lang.String b) When you're comparing two strings for equality and one of them is a value that could be provided by an attacker and the other is a value that the attacker shouldn't know, use this function to check for equality.
static byte[]	stringToUtf8(java.lang.String s)
static java.lang.String	urlSafeBase64Encode(byte[] data)
static java.lang.String	utf8ToString(byte[] utf8Data)
static java.lang.String	utf8ToString(byte[] utf8Data, int offset, int length)

Methods inherited from class java.lang.Object

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

Field Detail

UTF8

public static final java.nio.charset.Charset UTF8

Base64Digits

public static final java.lang.String Base64Digits

See Also:

Constant Field Values

UrlSafeBase64Digits

public static final java.lang.String UrlSafeBase64Digits

See Also:

Constant Field Values

Constructor Detail

StringUtil

public StringUtil()

Method Detail

hexDigit

public static char hexDigit(int i)

utf8ToString

public static java.lang.String utf8ToString(byte[] utf8Data)
                                     throws java.nio.charset.CharacterCodingException

Throws:

java.nio.charset.CharacterCodingException

utf8ToString

public static java.lang.String utf8ToString(byte[] utf8Data,
                                            int offset,
                                            int length)
                                     throws java.nio.charset.CharacterCodingException

Throws:

java.nio.charset.CharacterCodingException

stringToUtf8

public static byte[] stringToUtf8(java.lang.String s)

javaQuotedLiteral

public static java.lang.String javaQuotedLiteral(java.lang.String value)

Given a string, returns the representation of that string as a Java string literal.

javaQuotedLiterals

public static java.lang.String javaQuotedLiterals(java.lang.String[] value)

javaQuotedLiterals

public static java.lang.String javaQuotedLiterals(java.lang.Iterable<java.lang.String> value)

jq

public static java.lang.String jq(java.lang.String value)

Shorthand for javaQuotedLiteral(java.lang.String).

jq

public static java.lang.String jq(java.lang.String[] value)

Shorthand for javaQuotedLiterals(java.lang.String[]).

jq

public static java.lang.String jq(java.lang.Iterable<java.lang.String> value)

Shorthand for javaQuotedLiterals(java.lang.String[]).

binaryToHex

public static java.lang.String binaryToHex(byte[] data)

binaryToHex

public static java.lang.String binaryToHex(byte[] data,
                                           int offset,
                                           int length)

Convert a string of binary bytes to the equivalent hexadecimal string. The resulting String will have two characters for every byte in the input.

secureStringEquals

public static boolean secureStringEquals(java.lang.String a,
                                         java.lang.String b)

When you're comparing two strings for equality and one of them is a value that could be provided by an attacker and the other is a value that the attacker shouldn't know, use this function to check for equality. Using regular String.equals is not secure.

base64Encode

public static java.lang.String base64Encode(byte[] data)

urlSafeBase64Encode

public static java.lang.String urlSafeBase64Encode(byte[] data)

base64EncodeGeneric

public static java.lang.String base64EncodeGeneric(java.lang.String digits,
                                                   byte[] data)

join

public static java.lang.String join(java.util.Collection<java.lang.String> strings,
                                    java.lang.String delimiter)