co.cask.coopr.common.utils

Class StringUtils

java.lang.Object

co.cask.coopr.common.utils.StringUtils

public class StringUtils
extends Object

Utility for strings.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StringUtils.TraditionalBinaryPrefix The traditional binary prefixes, kilo, mega, ..., exa, which can be represented by a 64-bit integer.

Field Summary

Fields

Modifier and Type	Field and Description
static String[]	EMPTY_STRING_ARRAY

Constructor Summary

Constructors

Constructor and Description
StringUtils()

Method Summary

Methods

Modifier and Type	Method and Description
static String	arrayToString(String[] strs) Given an array of strings, return a comma-separated list of its elements.
static Collection<String>	getStringCollection(String str) Returns a collection of strings.
static String[]	getStrings(String str) Returns an arraylist of strings.
static Collection<String>	getTrimmedStringCollection(String str) Splits a comma separated value String, trimming leading and trailing whitespace on each value.
static String[]	getTrimmedStrings(String str) Splits a comma separated value String, trimming leading and trailing whitespace on each value.
static boolean	isValidDNSSuffix(String suffix) Check if the given DNS suffix is valid by checking that each label is at least 1 and at most 63 characters in length.
static String	stripLeadingDigits(String str) Strip all leading digits from a string.

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_STRING_ARRAY

public static final String[] EMPTY_STRING_ARRAY

Constructor Detail

StringUtils

public StringUtils()

Method Detail

stripLeadingDigits

public static String stripLeadingDigits(String str)

Strip all leading digits from a string. For example, "1234abc" becomes "abc". If the string is comprised entirely of digits, the empty string is returned.

Parameters:

str - string to strip

Returns:

string with leading digits stripped

isValidDNSSuffix

public static boolean isValidDNSSuffix(String suffix)
                                throws IllegalArgumentException

Check if the given DNS suffix is valid by checking that each label is at least 1 and at most 63 characters in length. Also check that each label has only characters, numbers, or '-', and that the entire suffix is at most 255 - 63 - 1 characters, since it will be appended to a single label later on to create a hostname. Also need to check that no label ends in a dash.

Parameters:

suffix - the suffix to check

Returns:

true is it is valid and false if it is not

Throws:

IllegalArgumentException

getStrings

public static String[] getStrings(String str)

Returns an arraylist of strings.

Parameters:

str - the comma seperated string values

Returns:

the arraylist of the comma seperated string values

getStringCollection

public static Collection<String> getStringCollection(String str)

Returns a collection of strings.

Parameters:

str - comma seperated string values

Returns:

an ArrayList of string values

getTrimmedStringCollection

public static Collection<String> getTrimmedStringCollection(String str)

Splits a comma separated value String, trimming leading and trailing whitespace on each value.

Parameters:

str - a comma separated with values

Returns:

a Collection of String values

getTrimmedStrings

public static String[] getTrimmedStrings(String str)

Splits a comma separated value String, trimming leading and trailing whitespace on each value.

Parameters:

str - a comma separated with values

Returns:

an array of String values

arrayToString

public static String arrayToString(String[] strs)

Given an array of strings, return a comma-separated list of its elements.

Parameters:

strs - Array of strings

Returns:

Empty string if strs.length is 0, comma separated list of strings otherwise