io.druid.java.util.common

Class StringUtils

java.lang.Object

io.druid.java.util.common.StringUtils

public class StringUtils
extends Object

As of OpenJDK / Oracle JDK 8, the JVM is optimized around String charset variable instead of Charset passing, that is exploited in toUtf8(String) and fromUtf8(byte[]).

Field Summary

Fields

Modifier and Type	Field and Description
static byte[]	EMPTY_BYTES
static Charset	UTF8_CHARSET Deprecated.
static String	UTF8_STRING

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Modifier and Type	Method and Description
static int	estimatedBinaryLengthAsUTF8(String value)
static String	format(String message, Object... formatArgs) Equivalent of String.format(Locale.ENGLISH, message, formatArgs).
static String	fromUtf8(byte[] bytes)
static String	fromUtf8(ByteBuffer buffer)
static String	fromUtf8(ByteBuffer buffer, int numBytes)
static String	nonStrictFormat(String message, Object... formatArgs) Formats the string as format(String, Object...), but instead of failing on illegal format, returns the concatenated format string and format arguments.
static String	removeChar(String s, char c)
static String	toLowerCase(String s)
static String	toUpperCase(String s)
static byte[]	toUtf8(String string)
static byte[]	toUtf8WithNullToEmpty(String string)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_BYTES

public static final byte[] EMPTY_BYTES

UTF8_CHARSET

@Deprecated
public static final Charset UTF8_CHARSET

Deprecated.

UTF8_STRING

public static final String UTF8_STRING

Constructor Detail

StringUtils

public StringUtils()

Method Detail

estimatedBinaryLengthAsUTF8

public static int estimatedBinaryLengthAsUTF8(String value)

toUtf8WithNullToEmpty

public static byte[] toUtf8WithNullToEmpty(String string)

fromUtf8

public static String fromUtf8(byte[] bytes)

fromUtf8

public static String fromUtf8(ByteBuffer buffer,
                              int numBytes)

fromUtf8

public static String fromUtf8(ByteBuffer buffer)

toUtf8

public static byte[] toUtf8(String string)

format

public static String format(String message,
                            Object... formatArgs)

Equivalent of String.format(Locale.ENGLISH, message, formatArgs).

nonStrictFormat

public static String nonStrictFormat(String message,
                                     Object... formatArgs)

Formats the string as format(String, Object...), but instead of failing on illegal format, returns the concatenated format string and format arguments. Should be used for unimportant formatting like logging, exception messages, typically not directly.

toLowerCase

public static String toLowerCase(String s)

toUpperCase

public static String toUpperCase(String s)

removeChar

public static String removeChar(String s,
                                char c)