org.xbib.elasticsearch.plugin.jdbc.util

Class Strings

java.lang.Object

org.xbib.elasticsearch.plugin.jdbc.util.Strings

public final class Strings
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	EMPTY

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	isNullOrEmpty(String target) Tells whether the given string is either or consists solely of whitespace characters.
static String	join(List<String> pieces, String separator) Gives a string consisting of the string representations of the elements of a given array of objects, each separated by a given separator string.
static String	join(String[] pieces, String separator) Gives a string consisting of the elements of a given array of strings, each separated by a given separator string.
static String	repeat(char ch, int count) Gives a string consisting of the given character repeated the given number of times.
static String	replace(String text, String searchString, String replacement) Replaces all occurrences of a String within another String.
static String	replace(String text, String searchString, String replacement, int max) Replaces a String with another String inside a larger String, for the first max values of the search String.
static String	replaceOnce(String text, String searchString, String replacement) Replaces a String with another String inside a larger String, once.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final String EMPTY

See Also:

Constant Field Values

Method Detail

repeat

public static String repeat(char ch,
            int count)

Gives a string consisting of the given character repeated the given number of times.

Parameters:

ch - the character to repeat

count - how many times to repeat the character

Returns:

the resultant string

isNullOrEmpty

public static boolean isNullOrEmpty(String target)

Tells whether the given string is either or consists solely of whitespace characters.

Parameters:

target - string to check

Returns:

true if the target string is null or empty

join

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

Gives a string consisting of the elements of a given array of strings, each separated by a given separator string.

Parameters:

pieces - the strings to join

separator - the separator

Returns:

the joined string

join

public static String join(List<String> pieces,
          String separator)

Gives a string consisting of the string representations of the elements of a given array of objects, each separated by a given separator string.

Parameters:

pieces - the elements whose string representations are to be joined

separator - the separator

Returns:

the joined string

replaceOnce

public static String replaceOnce(String text,
                 String searchString,
                 String replacement)

Replaces a String with another String inside a larger String, once.

A null reference passed to this method is a no-op.

 StringUtils.replaceOnce(null, *, *)        = null
 StringUtils.replaceOnce("", *, *)          = ""
 StringUtils.replaceOnce("any", null, *)    = "any"
 StringUtils.replaceOnce("any", *, null)    = "any"
 StringUtils.replaceOnce("any", "", *)      = "any"
 StringUtils.replaceOnce("aba", "a", null)  = "aba"
 StringUtils.replaceOnce("aba", "a", "")    = "ba"
 StringUtils.replaceOnce("aba", "a", "z")   = "zba"
 

Parameters:

text - text to search and replace in, may be null

searchString - the String to search for, may be null

replacement - the String to replace with, may be null

Returns:

the text with any replacements processed, null if null String input

See Also:

replace(String text, String searchString, String replacement, int max)

replace

public static String replace(String text,
             String searchString,
             String replacement)

Replaces all occurrences of a String within another String.

A null reference passed to this method is a no-op.

 StringUtils.replace(null, *, *)        = null
 StringUtils.replace("", *, *)          = ""
 StringUtils.replace("any", null, *)    = "any"
 StringUtils.replace("any", *, null)    = "any"
 StringUtils.replace("any", "", *)      = "any"
 StringUtils.replace("aba", "a", null)  = "aba"
 StringUtils.replace("aba", "a", "")    = "b"
 StringUtils.replace("aba", "a", "z")   = "zbz"
 

Parameters:

text - text to search and replace in, may be null

searchString - the String to search for, may be null

replacement - the String to replace it with, may be null

Returns:

the text with any replacements processed, null if null String input

See Also:

replace(String text, String searchString, String replacement, int max)

replace

public static String replace(String text,
             String searchString,
             String replacement,
             int max)

Replaces a String with another String inside a larger String, for the first max values of the search String.

A null reference passed to this method is a no-op.

 StringUtils.replace(null, *, *, *)         = null
 StringUtils.replace("", *, *, *)           = ""
 StringUtils.replace("any", null, *, *)     = "any"
 StringUtils.replace("any", *, null, *)     = "any"
 StringUtils.replace("any", "", *, *)       = "any"
 StringUtils.replace("any", *, *, 0)        = "any"
 StringUtils.replace("abaa", "a", null, -1) = "abaa"
 StringUtils.replace("abaa", "a", "", -1)   = "b"
 StringUtils.replace("abaa", "a", "z", 0)   = "abaa"
 StringUtils.replace("abaa", "a", "z", 1)   = "zbaa"
 StringUtils.replace("abaa", "a", "z", 2)   = "zbza"
 StringUtils.replace("abaa", "a", "z", -1)  = "zbzz"
 

Parameters:

text - text to search and replace in, may be null

searchString - the String to search for, may be null

replacement - the String to replace it with, may be null

max - maximum number of values to replace, or -1 if no maximum

Returns:

the text with any replacements processed, null if null String input