java.lang.Object
- org.swisspush.gateleen.core.util.StringUtils

```
public final class StringUtils
extends Object
```
Utility class providing handy methods to deal with Strings.

Author:

https://github.com/mcweba [Marc-Andre Weber]

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static String`	`getStringOrDefault(String inputString, String def)`	Returns a trimmed String containing the provided value or the provided default String.
`static String`	`getStringOrEmpty(String inputString)`	Returns a trimmed String containing the provided value or an empty ("") String.
`static boolean`	`isEmpty(CharSequence cs)`	Checks if a CharSequence is empty ("") or null.
`static boolean`	`isNotEmpty(CharSequence cs)`	Checks if a CharSequence is not empty ("") and not null.
`static boolean`	`isNotEmptyTrimmed(String str)`	Checks if a trimmed String is not empty ("") and not null.
`static String`	`replaceWildcardConfigs(String contentWithWildcards, Map<String,Object> properties)`	Returns a String with replaced wildcard values from the provided properties.
`static String`	`trim(String str)`	Removes control characters (char <= 32) from both ends of this String, handling `null` by returning `null`.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

isEmpty

public static boolean isEmpty(CharSequence cs)

Checks if a CharSequence is empty ("") or null.

 StringUtils.isEmpty(null)      = true
 StringUtils.isEmpty("")        = true
 StringUtils.isEmpty(" ")       = false
 StringUtils.isEmpty("bob")     = false
 StringUtils.isEmpty("  bob  ") = false

Parameters:: cs - the CharSequence to check, may be null
Returns:: true if the CharSequence is empty or null

isNotEmpty

public static boolean isNotEmpty(CharSequence cs)

Checks if a CharSequence is not empty ("") and not null.

 StringUtils.isNotEmpty(null)      = false
 StringUtils.isNotEmpty("")        = false
 StringUtils.isNotEmpty(" ")       = true
 StringUtils.isNotEmpty("bob")     = true
 StringUtils.isNotEmpty("  bob  ") = true

Parameters:: cs - the CharSequence to check, may be null
Returns:: true if the CharSequence is not empty and not null

isNotEmptyTrimmed

public static boolean isNotEmptyTrimmed(String str)

Checks if a trimmed String is not empty ("") and not null.

 StringUtils.isNotEmptyTrimmed(null)      = false
 StringUtils.isNotEmptyTrimmed("")        = false
 StringUtils.isNotEmptyTrimmed(" ")       = false
 StringUtils.isNotEmptyTrimmed("bob")     = true
 StringUtils.isNotEmptyTrimmed("  bob  ") = true

Parameters:: str - the String to check, may be null
Returns:: true if the String is not empty and not null

trim
```
public static String trim(String str)
```
Removes control characters (char <= 32) from both ends of this String, handling null by returning null.

The String is trimmed using String.trim(). Trim removes start and end characters <= 32.
```
 StringUtils.trim(null)          = null
 StringUtils.trim("")            = ""
 StringUtils.trim("     ")       = ""
 StringUtils.trim("abc")         = "abc"
 StringUtils.trim("    abc    ") = "abc"
 
```
Parameters:

str - the String to be trimmed, may be null

Returns:

the trimmed string, null if null String input

getStringOrEmpty

public static String getStringOrEmpty(String inputString)

Returns a trimmed String containing the provided value or an empty ("") String.

 StringUtils.getStringOrEmpty(null)      = ""
 StringUtils.getStringOrEmpty("")        = ""
 StringUtils.getStringOrEmpty(" ")       = ""
 StringUtils.getStringOrEmpty("bob")     = "bob"
 StringUtils.getStringOrEmpty("  bob  ") = "bob"

Parameters:: inputString - the String to check, may be null
Returns:: the trimmed inputString or an empty ("") String

getStringOrDefault

public static String getStringOrDefault(String inputString,
                                        String def)

Returns a trimmed String containing the provided value or the provided default String.

 StringUtils.getStringOrDefault(null, "bob")        = "bob"
 StringUtils.getStringOrDefault("", "bob")          = "bob"
 StringUtils.getStringOrDefault(" ", "bob")         = "bob"
 StringUtils.getStringOrDefault("alice", "bob")     = "alice"
 StringUtils.getStringOrDefault("  alice  ", "bob") = "alice"

Parameters:: inputString - the String to check, may be null; def - the default value to return when inputString is null or empty
Returns:: the trimmed inputString or the provided default value

replaceWildcardConfigs

public static String replaceWildcardConfigs(String contentWithWildcards,
                                            Map<String,Object> properties)

Returns a String with replaced wildcard values from the provided properties.

See example below:

 Input Variant Plain string:
 contentWithWildcards: "This is a very ${adjective} helper method"
 properties: com.google.common.collect.ImmutableMap.of("adjective", "nice")

 Output:
 "This is a very nice helper method"


 Input Variant JSON non string attribute:
 contentWithWildcards: "attribute" : "$${number.replace}"
 properties: com.google.common.collect.ImmutableMap.of("number.replace", "1234")

 Output:
 "attribute" : 1234

Parameters:: contentWithWildcards - the String containing the wildcards to replace; properties - the properties with the replacement values for the wildcards
Returns:: the String with replaced wildcard values. Returns the input String when input String or properties are null

Class StringUtils