org.apache.hudi.common.util

Class StringUtils

java.lang.Object

org.apache.hudi.common.util.StringUtils

public class StringUtils
extends Object

Simple utility for operations on strings.

Field Summary

Fields

Modifier and Type	Field and Description
static String	EMPTY_STRING

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Modifier and Type	Method and Description
static String	emptyToNull(String string) Returns the given string if it is nonempty; null otherwise.
static boolean	isNullOrEmpty(String str)
static String	join(CharSequence delimiter, Iterable<? extends CharSequence> elements) Wrapper of String.join(CharSequence, Iterable).
static <T> String	join(String... elements) Joins the elements of the provided array into a single String containing the provided list of elements.
static String	join(String[] array, String separator)
static <T> String	joinUsingDelim(String delim, String... elements)
static boolean	nonEmpty(String str)
static String	nullToEmpty(String string) Returns the given string if it is non-null; the empty string otherwise.
static String	objToString(Object obj)
static List<String>	split(String input, String delimiter) Splits input string, delimited delimiter into a list of non-empty strings (skipping any empty string produced during splitting)
static String	toHexString(byte[] bytes)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_STRING

public static final String EMPTY_STRING

See Also:

Constant Field Values

Constructor Detail

StringUtils

public StringUtils()

Method Detail

join

public static <T> String join(String... elements)

Joins the elements of the provided array into a single String containing the provided list of elements.

No separator is added to the joined String. Null objects or empty strings within the array are represented by empty strings.

 StringUtils.join(null)            = null
 StringUtils.join([])              = ""
 StringUtils.join([null])          = ""
 StringUtils.join(["a", "b", "c"]) = "abc"
 StringUtils.join([null, "", "a"]) = "a"
 

joinUsingDelim

public static <T> String joinUsingDelim(String delim,
                                        String... elements)

join

public static String join(String[] array,
                          String separator)

join

public static String join(CharSequence delimiter,
                          Iterable<? extends CharSequence> elements)

Wrapper of String.join(CharSequence, Iterable). Allow return null when Iterable is null.

toHexString

public static String toHexString(byte[] bytes)

isNullOrEmpty

public static boolean isNullOrEmpty(String str)

nonEmpty

public static boolean nonEmpty(String str)

nullToEmpty

public static String nullToEmpty(@Nullable
                                 String string)

Returns the given string if it is non-null; the empty string otherwise.

Parameters:

string - the string to test and possibly return

Returns:

string itself if it is non-null; "" if it is null

objToString

public static String objToString(@Nullable
                                 Object obj)

emptyToNull

@Nullable
public static String emptyToNull(@Nullable
                                           String string)

Returns the given string if it is nonempty; null otherwise.

Parameters:

string - the string to test and possibly return

Returns:

string itself if it is nonempty; null if it is empty or null

split

public static List<String> split(@Nullable
                                 String input,
                                 String delimiter)

Splits input string, delimited delimiter into a list of non-empty strings (skipping any empty string produced during splitting)