Package com.saperion.common.lang.string

Class Strings

java.lang.Object

com.saperion.common.lang.string.Strings

public final class Strings
extends Object

Contains utility methods for Strings.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	EMPTY

Method Summary

Modifier and Type	Method	Description
static String	camelCase2ConstantName(String camelCase)	Converts the specified camel case string to a constant name, that is: Converts all characters to upper case Inserts an underline ('_') before every upper case character of the camel case string except the first
static String	constantName2CamelCase(String constantName, boolean capitalizeFirstCharacter)	Converts the specified constant string to camel case, that is: Formats the first character to upper or lower case as specified Removes any underline ('_') Converts the character that follows an underline to upper case Converts all other characters to lower case
static String	escapeSql(String query)	Sanitizes the string for SQL query.
static String	format(Collection<String> colStrings, String separator, String nullString)	Converts the specified collection of strings to a string using the specified separator and string for null-elements.
static int	getCountOfOccurrence(String string, char c)	Returns how often the specified character occurs in the specified String.
static int	getCountOfOccurrence(String stringToScan, String stringContained)	Returns how often the specified potentially contained String occurs in the specified String to scan.
static boolean	isBlank(String string)	Checks if a String is null, empty or consists of whitespace characters only.
static boolean	isNullOrEmpty(String string)	Checks if a String is null or empty.
static String	newString(char c, int length)	Creates a new String of the specified length filled with the specified character.

Methods inherited from class java.lang.Object

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

Field Details

EMPTY

public static final String EMPTY

See Also:

• Constant Field Values

Method Details

isBlank

public static boolean isBlank(String string)

Checks if a String is null, empty or consists of whitespace characters only.

Parameters:

string - String to check

Returns:

true if string is blank

isNullOrEmpty

public static boolean isNullOrEmpty(String string)

Checks if a String is null or empty.

Parameters:

string - string to check

Returns:

true if string is empty

newString

public static String newString(char c,
 int length)

Creates a new String of the specified length filled with the specified character.

Parameters:

c - character to fill the new String with

length - length of the new String

Returns:

a new String of the specified length filled with the specified character

format

public static String format(Collection<String> colStrings,
 String separator,
 String nullString)

Converts the specified collection of strings to a string using the specified separator and string for null-elements.

This method is not bijective, so the data can not be restored from the resulting string. For a bijective method for data conversion, see Conversion.convertStringCollectionToString(Collection, char, char, String).

The specified collection must not be null. The specified separator must not be null. The specified nullString must not be null.

Parameters:

colStrings - collection of strings to convert

separator - separator character

nullString - string for null-elements

Returns:

string

See Also:

• Conversion.convertStringCollectionToString(Collection, char, char, String)
• Conversion.convertStringToStringList(String, char, char, String)

constantName2CamelCase

public static String constantName2CamelCase(String constantName,
 boolean capitalizeFirstCharacter)

Converts the specified constant string to camel case, that is:

• Formats the first character to upper or lower case as specified
• Removes any underline ('_')
• Converts the character that follows an underline to upper case
• Converts all other characters to lower case

The specified constant name must not be null.

Parameters:

constantName - constant name to convert

capitalizeFirstCharacter - whether the first character should be formatted as upper case

Returns:

converted string

camelCase2ConstantName

public static String camelCase2ConstantName(String camelCase)

Converts the specified camel case string to a constant name, that is:

• Converts all characters to upper case
• Inserts an underline ('_') before every upper case character of the camel case string except the first

The specified camel case string must not be null.

Parameters:

camelCase - string to convert

Returns:

converted string

getCountOfOccurrence

public static int getCountOfOccurrence(String string,
 char c)

Returns how often the specified character occurs in the specified String.

The specified string must not be null.

Parameters:

string - String to search the character in

c - character to search

Returns:

count of occurrence of the specified character in the specified String

getCountOfOccurrence

public static int getCountOfOccurrence(String stringToScan,
 String stringContained)

Returns how often the specified potentially contained String occurs in the specified String to scan.

The specified Strings to scan must not be null.

The specified potentially contained Strings must not be null or empty.

Parameters:

stringToScan - String to scan for occurrences of the potentially contained String

stringContained - potentially contained String to search for in the String to scan

Returns:

count of occurrence

escapeSql

public static String escapeSql(String query)

Sanitizes the string for SQL query. This operation replaces ' with '' \ with \\ and removes \\\\ It is required since StringEscapeUtils#escapeSql was removed in 3.x https://commons.apache.org/proper/commons-lang/article3_0.html#StringEscapeUtils.escapeSql source: https://github.com/geotools/geotools/blob/main/modules/library/jdbc/src/main/java/org/geotools/jdbc/EscapeSql.java#L51

Parameters:

query - the sql query

Returns:

sanitized sql query