org.neo4j.helpers

Class Exceptions

java.lang.Object

org.neo4j.helpers.Exceptions

public class Exceptions
extends Object

Method Summary

Methods

Modifier and Type	Method and Description
static Predicate<Throwable>	exceptionsOfType(Class<? extends Throwable>... types)
static <T extends Throwable> T	launderedException(Class<T> type, String messageForUnexpected, Throwable exception)
static <T extends Throwable> T	launderedException(Class<T> type, Throwable exception)
static RuntimeException	launderedException(String messageForUnexpected, Throwable exception)
static RuntimeException	launderedException(Throwable exception)
static Throwable	peel(Throwable exception, Predicate<Throwable> toPeel) Peels off layers of causes.
static <T extends Throwable> T	withCause(T exception, Throwable cause)

Methods inherited from class java.lang.Object

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

Method Detail

withCause

public static <T extends Throwable> T withCause(T exception,
                                Throwable cause)

launderedException

public static RuntimeException launderedException(Throwable exception)

launderedException

public static RuntimeException launderedException(String messageForUnexpected,
                                  Throwable exception)

launderedException

public static <T extends Throwable> T launderedException(Class<T> type,
                                         Throwable exception)

launderedException

public static <T extends Throwable> T launderedException(Class<T> type,
                                         String messageForUnexpected,
                                         Throwable exception)

peel

public static Throwable peel(Throwable exception,
             Predicate<Throwable> toPeel)

Peels off layers of causes. For example: MyFarOuterException cause: MyOuterException cause: MyInnerException cause: MyException and a toPeel predicate returning true for MyFarOuterException and MyOuterException will return MyInnerException. If the predicate peels all exceptions null is returned.

Parameters:

exception - the outer exception to peel to get to an delegate cause.

toPeel - Predicate for deciding what to peel. true means to peel (i.e. remove), whereas the first false means stop and return.

Returns:

the delegate cause of an exception, dictated by the predicate.

exceptionsOfType

public static Predicate<Throwable> exceptionsOfType(Class<? extends Throwable>... types)