Package io.reactivex.rxjava3.internal.util

Class ExceptionHelper

  • public final class ExceptionHelper
extends java.lang.Object
    Terminal atomics for Throwable containers.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.lang.Throwable TERMINATED
      A singleton instance of a Throwable indicating a terminal state for exceptions, don't leak this.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      private ExceptionHelper()
      Utility class.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static boolean addThrowable​(java.util.concurrent.atomic.AtomicReference<java.lang.Throwable> field, java.lang.Throwable exception)  
      static java.lang.NullPointerException createNullPointerException​(java.lang.String prefix)
      Creates a NullPointerException with a composed message via nullWarning(String).
      static java.util.List<java.lang.Throwable> flatten​(java.lang.Throwable t)
      Returns a flattened list of Throwables from tree-like CompositeException chain.
      static <T> T nullCheck​(T value, java.lang.String prefix)
      Similar to Objects.requireNonNull but composes the error message via nullWarning(String).
      static java.lang.String nullWarning​(java.lang.String prefix)
      Composes a String with a null warning message.
      static java.lang.Throwable terminate​(java.util.concurrent.atomic.AtomicReference<java.lang.Throwable> field)  
      static <E extends java.lang.Throwable>
      java.lang.Exception      		 throwIfThrowable​(java.lang.Throwable e)
      Workaround for Java 6 not supporting throwing a final Throwable from a catch block.
      static java.lang.String timeoutMessage​(long timeout, java.util.concurrent.TimeUnit unit)  
      static java.lang.RuntimeException wrapOrThrow​(java.lang.Throwable error)
      If the provided Throwable is an Error this method throws it, otherwise returns a RuntimeException wrapping the error if that error is a checked exception.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • TERMINATED

        public static final java.lang.Throwable TERMINATED
        A singleton instance of a Throwable indicating a terminal state for exceptions, don't leak this.

    • Constructor Detail

      • ExceptionHelper

        private ExceptionHelper()
        Utility class.

    • Method Detail

      • wrapOrThrow

        public static java.lang.RuntimeException wrapOrThrow​(java.lang.Throwable error)
        If the provided Throwable is an Error this method throws it, otherwise returns a RuntimeException wrapping the error if that error is a checked exception.
        Parameters:
        error - the error to wrap or throw
        Returns:
        the (wrapped) error

      • addThrowable

        public static boolean addThrowable​(java.util.concurrent.atomic.AtomicReference<java.lang.Throwable> field,
                                   java.lang.Throwable exception)

      • terminate

        public static java.lang.Throwable terminate​(java.util.concurrent.atomic.AtomicReference<java.lang.Throwable> field)

      • flatten

        public static java.util.List<java.lang.Throwable> flatten​(java.lang.Throwable t)
        Returns a flattened list of Throwables from tree-like CompositeException chain.
        Parameters:
        t - the starting throwable
        Returns:
        the list of Throwables flattened in a depth-first manner

      • throwIfThrowable

        public static <E extends java.lang.Throwable> java.lang.Exception throwIfThrowable​(java.lang.Throwable e)
                                                                            throws E extends java.lang.Throwable
        Workaround for Java 6 not supporting throwing a final Throwable from a catch block.
        Type Parameters:
        E - the generic exception type
        Parameters:
        e - the Throwable error to return or throw
        Returns:
        the Throwable e if it is a subclass of Exception
        Throws:
        E - the generic exception thrown
        E extends java.lang.Throwable

      • timeoutMessage

        public static java.lang.String timeoutMessage​(long timeout,
                                              java.util.concurrent.TimeUnit unit)

      • nullWarning

        public static java.lang.String nullWarning​(java.lang.String prefix)
        Composes a String with a null warning message.
        Parameters:
        prefix - the prefix to add to the message.
        Returns:
        the composed String
        Since:
        3.0.0

      • createNullPointerException

        public static java.lang.NullPointerException createNullPointerException​(java.lang.String prefix)
        Creates a NullPointerException with a composed message via nullWarning(String).
        Parameters:
        prefix - the prefix to add to the message.
        Returns:
        the composed String
        Since:
        3.0.0

      • nullCheck

        public static <T> T nullCheck​(T value,
                              java.lang.String prefix)
        Similar to Objects.requireNonNull but composes the error message via nullWarning(String).
        Type Parameters:
        T - the value type
        Parameters:
        value - the value to check
        prefix - the prefix to the error message
        Returns:
        the value
        Throws:
        java.lang.NullPointerException - if value is null
        Since:
        3.0.0