Package net.obvj.confectory.util

Class StringUtils

java.lang.Object

net.obvj.confectory.util.StringUtils

public class StringUtils
extends Object

Common methods for working with strings.

Since:

0.1.0

Author:

oswaldo.bapvic.jr (Oswaldo Junior)

Method Summary

Modifier and Type	Method	Description
static String	defaultIfEmpty(String string, Supplier<String> defaultSupplier)	Returns either the passed in string, or if the string is empty ("") or null, the value returned by the specified supplier.
static String	expandEnvironmentVariables(String string)	Replaces all the occurrences of system environment variables placed between "${" and "}" with their matching values from the given source string.

Methods inherited from class java.lang.Object

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

Method Detail

expandEnvironmentVariables

public static String expandEnvironmentVariables(String string)

Replaces all the occurrences of system environment variables placed between "${" and "}" with their matching values from the given source string.

For example:

 StringUtils.expandEnvironmentVariables("${TMPDIR}/file1") = "/tmp/file1"
 

Parameters:

string - the string to be expanded; null returns null

Returns:

the expanded string

defaultIfEmpty

public static String defaultIfEmpty(String string,
                                    Supplier<String> defaultSupplier)

Returns either the passed in string, or if the string is empty ("") or null, the value returned by the specified supplier.

For example:

 StringUtils.defaultIfEmpty(null,() -> "default") = "default"
 StringUtils.defaultIfEmpty("",  () -> "default") = "default"
 StringUtils.defaultIfEmpty("a", () -> "default") = "a"
 

Parameters:

string - the string to check; may be null

defaultSupplier - a string supplier function to be executed only if the original string is empty or null

Returns:

the passed in string, or the value returned by the specified supplier

Throws:

NullPointerException - if the passed in supplier is null

Since:

2.5.0