Package org.faktorips.runtime.internal

Class IpsStringUtils

java.lang.Object

org.faktorips.runtime.internal.IpsStringUtils

public final class IpsStringUtils
extends java.lang.Object

A collection of utility methods for Strings. We don't use a class library like apache-commons here to minimize the dependencies for the generated code.

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	EMPTY

Method Summary

Modifier and Type	Method	Description
static boolean	isBlank(java.lang.String s)	Returns true if s is either null, the empty string or a string that only contains whitespace, otherwise false.
static boolean	isEmpty(java.lang.String s)	Returns true if s is either null or the empty string, otherwise false.
static boolean	isNotEmpty(java.lang.String s)	Returns true if s is neither null nor the empty string, otherwise false.
static java.lang.String	join(java.lang.Iterable<?> iterable)	Joins the elements of the provided Iterable into a single String containing the provided elements with the default separator ", ".
static java.lang.String	join(java.lang.Iterable<?> iterable, java.lang.String separator)	Joins the elements of the provided Iterable into a single String containing the provided elements with the given separator.
static <T> java.lang.String	join(java.lang.Iterable<T> iterable, java.util.function.Function<? super T,java.lang.String> toString)	Joins the elements of the provided Iterable into a single String containing the provided elements, converted to String with the given toString Function, with the default separator ", ".
static <T> java.lang.String	join(java.lang.Iterable<T> iterable, java.util.function.Function<? super T,java.lang.String> toString, java.lang.String separator)	Joins the elements of the provided Iterable into a single String containing the provided elements, converted to String with the given toString Function, with the given separator.
static java.lang.String	join(java.lang.Object[] objectArray)	Joins the elements of the provided array into a single String containing the provided elements with the default separator ", ".
static java.lang.String	join(java.lang.Object[] objectArray, java.lang.String separator)	Joins the elements of the provided array into a single String containing the provided elements with the given separator.
static java.lang.String	join(java.util.Collection<?> collection, java.lang.String separator)	Joins the elements of the provided Collection into a single String containing the provided elements with the given separator.
static java.lang.String	toLowerFirstChar(java.lang.String string)

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY

public static final java.lang.String EMPTY

See Also:

Constant Field Values

Method Detail

isEmpty

public static final boolean isEmpty(java.lang.String s)

Returns true if s is either null or the empty string, otherwise false.

isNotEmpty

public static final boolean isNotEmpty(java.lang.String s)

Returns true if s is neither null nor the empty string, otherwise false.

isBlank

public static final boolean isBlank(java.lang.String s)

Returns true if s is either null, the empty string or a string that only contains whitespace, otherwise false.

join

public static final java.lang.String join(java.util.Collection<?> collection,
                                          java.lang.String separator)

Joins the elements of the provided Collection into a single String containing the provided elements with the given separator. No delimiter is added before or after the list.

Parameters:

collection - the Collection of values to join together, may be null

separator - the separator to use, null treated as ""

Returns:

the joined String, empty if the collection is null

join

public static final java.lang.String join(java.lang.Iterable<?> iterable,
                                          java.lang.String separator)

Joins the elements of the provided Iterable into a single String containing the provided elements with the given separator. No delimiter is added before or after the list.

Parameters:

iterable - the Collection of values to join together, may be null

separator - the separator to use, null treated as ""

Returns:

the joined String, empty if the collection is null

join

public static final java.lang.String join(java.lang.Iterable<?> iterable)

Joins the elements of the provided Iterable into a single String containing the provided elements with the default separator ", ". No delimiter is added before or after the list.

Parameters:

iterable - the Collection of values to join together, may be null

Returns:

the joined String, empty if the collection is null

join

public static final java.lang.String join(java.lang.Object[] objectArray)

Joins the elements of the provided array into a single String containing the provided elements with the default separator ", ". No delimiter is added before or after the list.

Parameters:

objectArray - the array of values to join together, may be null

Returns:

the joined String, empty if the collection is null

join

public static final java.lang.String join(java.lang.Object[] objectArray,
                                          java.lang.String separator)

Joins the elements of the provided array into a single String containing the provided elements with the given separator. No delimiter is added before or after the list.

Parameters:

objectArray - the array of values to join together, may be null

separator - the separator to use, null treated as ""

Returns:

the joined String, empty if the collection is null

join

public static final <T> java.lang.String join(java.lang.Iterable<T> iterable,
                                              java.util.function.Function<? super T,java.lang.String> toString)

Joins the elements of the provided Iterable into a single String containing the provided elements, converted to String with the given toString Function, with the default separator ", ". No delimiter is added before or after the list.

Parameters:

iterable - the Collection of values to join together, may be null

toString - the Function to convert an element from the Iterable to a String

Returns:

the joined String, null if the collection is null

join

public static final <T> java.lang.String join(java.lang.Iterable<T> iterable,
                                              java.util.function.Function<? super T,java.lang.String> toString,
                                              java.lang.String separator)

Joins the elements of the provided Iterable into a single String containing the provided elements, converted to String with the given toString Function, with the given separator. No delimiter is added before or after the list.

Parameters:

iterable - the Collection of values to join together, may be null

separator - the separator to use, null treated as ""

toString - the Function to convert an element from the Iterable to a String

Returns:

the joined String, null if the collection is null

toLowerFirstChar

public static final java.lang.String toLowerFirstChar(java.lang.String string)