Package io.activej.common

Class Utils

java.lang.Object

io.activej.common.Utils

@Internal
public class Utils
extends Object

Utility helper methods for internal use

Field Summary

Fields

Modifier and Type	Field	Description
static final int	TO_STRING_LIMIT

Constructor Summary

Constructors

Constructor	Description
Utils()

Method Summary

Modifier and Type	Method	Description
static boolean	arraysEquals(byte[] array1, int pos1, int len1, byte[] array2, int pos2, int len2)
static int	initialCapacity(int initialSize)
static boolean	isBijection(Map<?,?> map)
static <T> Stream<T>	iterate(Supplier<? extends T> supplier, Predicate<? super T> hasNext)
static <T> Stream<T>	iterate(T seed, Predicate<? super T> hasNext, UnaryOperator<T> f)
static <T> BinaryOperator<T>	noMergeFunction()
static <T> T	nonNullElse(T value1, T defaultValue)
static String	nonNullElseEmpty(@Nullable String value)
static <T> List<T>	nonNullElseEmpty(@Nullable List<T> list)
static <K, V> Map<K,V>	nonNullElseEmpty(@Nullable Map<K,V> map)
static <T> Set<T>	nonNullElseEmpty(@Nullable Set<T> set)
static <T> T	nonNullElseGet(T value, Supplier<? extends T> defaultValue)
static <T, E extends Throwable> T	nonNullOrException(T value, Supplier<E> exceptionSupplier)
static <V, A> V	nullify(V value, BiConsumer<? super V,A> action, A actionArg)
static <V> V	nullify(V value, Consumer<? super V> action)
static <V, A> V	replace(V value, V newValue, BiConsumer<? super V,A> action, A actionArg)
static <V> V	replace(V value, V newValue, Consumer<? super V> action)
static <T> String	toString(Collection<? extends T> collection)
static <T> String	toString(Collection<? extends T> collection, int limit)
static <K, V> String	toString(Map<? extends K,? extends V> map)
static <K, V> String	toString(Map<? extends K,? extends V> map, int limit)

Methods inherited from class java.lang.Object

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

Field Details

TO_STRING_LIMIT

public static final int TO_STRING_LIMIT

Constructor Details

Utils

public Utils()

Method Details

nonNullElse

public static <T> T nonNullElse(@Nullable
 T value1,
 T defaultValue)

nonNullElseGet

public static <T> T nonNullElseGet(@Nullable
 T value,
 Supplier<? extends T> defaultValue)

nonNullElseEmpty

public static String nonNullElseEmpty(@Nullable
 @Nullable String value)

nonNullElseEmpty

public static <T> Set<T> nonNullElseEmpty(@Nullable
 @Nullable Set<T> set)

nonNullElseEmpty

public static <T> List<T> nonNullElseEmpty(@Nullable
 @Nullable List<T> list)

nonNullElseEmpty

public static <K,
V> Map<K,V> nonNullElseEmpty(@Nullable
 @Nullable Map<K,V> map)

nonNullOrException

public static <T,
E extends Throwable> T nonNullOrException(@Nullable
 T value,
 Supplier<E> exceptionSupplier)
                                                    throws E

Throws:

E extends Throwable

nullify

@Contract("_, _ -> null")
@Nullable
public static <V> V nullify(@Nullable
 V value,
 Consumer<? super V> action)

nullify

@Contract("_, _, _ -> null")
@Nullable
public static <V,
A> V nullify(@Nullable
 V value,
 BiConsumer<? super V,A> action,
 A actionArg)

replace

@Nullable
public static <V> V replace(@Nullable
 V value,
 @Nullable
 V newValue,
 Consumer<? super V> action)

replace

@Nullable
public static <V,
A> V replace(@Nullable
 V value,
 @Nullable
 V newValue,
 BiConsumer<? super V,A> action,
 A actionArg)

arraysEquals

public static boolean arraysEquals(byte[] array1,
 int pos1,
 int len1,
 byte[] array2,
 int pos2,
 int len2)

isBijection

public static boolean isBijection(Map<?,?> map)

iterate

public static <T> Stream<T> iterate(Supplier<? extends T> supplier,
 Predicate<? super T> hasNext)

iterate

public static <T> Stream<T> iterate(T seed,
 Predicate<? super T> hasNext,
 UnaryOperator<T> f)

noMergeFunction

public static <T> BinaryOperator<T> noMergeFunction()

initialCapacity

public static int initialCapacity(int initialSize)

toString

public static <T> String toString(Collection<? extends T> collection)

toString

public static <K,
V> String toString(Map<? extends K,? extends V> map)

toString

public static <T> String toString(Collection<? extends T> collection,
 int limit)

toString

public static <K,
V> String toString(Map<? extends K,? extends V> map,
 int limit)