Class ObjectUtils

java.lang.Object
io.fluxzero.common.ObjectUtils
public class ObjectUtils extends Object
Utility class for common object handling, memoization, concurrency, stream processing, and error handling.

Offers reusable tools for:

  • Memoizing functional interfaces
  • Retry-safe functional wrappers (callables, consumers, etc.)
  • Stream deduplication and flattening
  • Property file manipulation
  • Exception-safe task execution and error unwrapping
  • Custom thread factories and naming

  • Constructor Details

    • ObjectUtils

      public ObjectUtils()

  • Method Details

    • noOpPredicate

      public static <T> Predicate<T> noOpPredicate()
      Returns a predicate that always evaluates to true.

    • noOpBiPredicate

      public static <T,U> BiPredicate<T,U> noOpBiPredicate()
      Returns a bi-predicate that always evaluates to true.

    • distinctByKey

      public static <T> Predicate<T> distinctByKey(Function<? super T, ?> keyExtractor)
      Returns a predicate that filters out duplicates based on a key extractor.

    • iterate

      public static <T> Stream<T> iterate(T seed, UnaryOperator<T> f, Predicate<T> breakCondition)
      Creates a stream that stops once the break condition evaluates true.

    • concat

      @SafeVarargs public static <T> Stream<T> concat(Stream<? extends T>... streams)
      Concatenates multiple streams into a single flat stream.

    • deduplicate

      public static <T> List<T> deduplicate(List<T> list)
      Deduplicates elements in the list, preserving the last occurrence.

    • deduplicate

      public static <T> List<T> deduplicate(List<T> list, Function<T,?> idFunction)
      Deduplicates elements using a key extractor, preserving the last occurrence.

    • deduplicate

      public static <T> List<T> deduplicate(List<T> list, Function<T,?> idFunction, boolean keepFirst)
      Deduplicates elements using a key extractor, optionally keeping the first occurrence.

    • asStream

      public static Stream<?> asStream(Object value)
      Converts an object into a stream. Supports Collection, Stream, Optional, or single value.

    • ifTrue

      public static Consumer<Runnable> ifTrue(boolean check)
      Returns a consumer that runs the task only if check is true.

    • forceThrow

      public static Object forceThrow(Throwable error)
      Forces the given throwable to be thrown.

    • call

      public static <T> T call(Callable<T> callable)
      Calls the given callable, forcibly rethrowing exceptions.

    • run

      public static void run(ThrowingRunnable runnable)
      Executes the runnable, forcibly rethrowing exceptions as unchecked.

    • asCallable

      public static Callable<?> asCallable(ThrowingRunnable runnable)
      Converts a ThrowingRunnable into a Callable<Object> that returns null.

    • asCallable

      public static Callable<?> asCallable(Runnable runnable)
      Converts a standard Runnable into a Callable<Object> that returns null.

    • tryRun

      public static void tryRun(Runnable task)
      Executes the runnable and logs any thrown exception.

    • tryCatch

      public static Runnable tryCatch(Runnable runnable)
      Wraps a runnable in a try/catch block that logs any exception on execution.

    • asSupplier

      public static <T> Supplier<T> asSupplier(Callable<T> callable)

    • asRunnable

      public static Runnable asRunnable(ThrowingRunnable runnable)

    • asFunction

      public static <T,R> Function<T,R> asFunction(ThrowingFunction<T,R> function)

    • asConsumer

      public static <T> Consumer<T> asConsumer(ThrowingConsumer<T> consumer)

    • asRunnable

      public static Runnable asRunnable(Callable<?> callable)

    • getBytes

      public static byte[] getBytes(ByteBuffer buffer)
      Extracts the byte array from a ByteBuffer.

    • unwrapException

      public static Throwable unwrapException(Throwable e)
      Recursively unwraps the cause of common wrapping exceptions.

    • asProperties

      public static Properties asProperties(String content)
      Parses Java Properties from a string.

    • copyOf

      public static Properties copyOf(Properties properties)
      Creates a deep copy of a Properties instance.

    • merge

      public static Properties merge(Properties a, Properties b)
      Merges two Properties instances into a new one.

    • memoize

      public static <T> MemoizingSupplier<T> memoize(Supplier<T> supplier)

    • memoize

      public static <K,V> MemoizingFunction<K,V> memoize(Function<K,V> supplier)

    • memoize

      public static <T,U,R> MemoizingBiFunction<T,U,R> memoize(BiFunction<T,U,R> supplier)

    • newPlatformThreadFactory

      public static ThreadFactory newPlatformThreadFactory(String prefix)
      Creates a new ThreadFactory with a named prefix.

    • tryAccept

      public static <T> Consumer<? super T> tryAccept(Consumer<? super T> consumer)
      Returns a consumer that logs errors instead of propagating them.

    • silentTest

      public static <T> Predicate<T> silentTest(Predicate<T> predicate)
      Returns a predicate that silently returns false when the given predicate throws an error.

    • join

      public static byte[] join(byte[]... chunks)
      Combines multiple byte arrays into a single byte array by concatenating their contents in the given order.