Package org.neo4j.helpers

Common Java utilities.

See: Description

Interface Summary

Interface	Description
ArrayUtil.ArrayEquality
BiConsumer<T,U>	Instances are operations that need two operands to execute
Cancelable
CancellationRequest	Represents the concept of a cancellation notification towards a task.
Clock
CloneableInPublic
Factory<T>	Deprecated Use Factory instead.
Function<FROM,TO>	Deprecated
Function2<T1,T2,R>	Deprecated
Listeners.Notification<T>
NamedThreadFactory.Monitor
Predicate<T>	Predicate useful for filtering.
Provider<TYPE>	Similar to a factory, but with a different contract.
TaskControl	Represents a control handle passed to a child task which allows the creator to cancel it.
Thunk<T>	http://en.wikipedia.org/wiki/Thunk_%28functional_programming%29 A parameter-less function for lazy evaluation to prevent the evaluation of an expression until forced at a later time.
ValueGetter<T>

Class Summary

Class	Description
Args	Parses a String[] argument from a main-method.
Args.ArgsParser
Args.Option<T>
ArrayUtil	Methods "missing" from Arrays are provided here.
ConcurrentTransfer<TYPE>	Abstracts a meeting point between two threads, where a reference can change hands.
Counter
Exceptions
Format
FrozenClock
Functions	Deprecated use Functions instead.
FutureAdapter<V>
FutureAdapter.Present<V>
HostnamePort	Represents a hostname and port, optionally with a port range.
Listeners	Helper class for dealing with listeners
NamedThreadFactory
Pair<T1,T2>	Utility to handle pairs of objects.
Platforms
Predicates	Common predicates
Predicates.AndPredicate<T>
Predicates.OrPredicate<T>
ProcessFailureException.Entry
RunCarefully
Service	A utility for locating services.
Service.CaseInsensitiveService	A base class for services, similar to Service, that compares keys using case insensitive comparison instead of exact comparison.
Settings	Create settings for configurations in Neo4j.
Settings.DefaultSetting<T>
Settings.DirectMemoryUsage	Behaves the same as BYTES, but augments the available settings by also adding the ability to specify memory usage as a percentage of available RAM.
SillyUtils	Utility functions that are helpful for suppressing compiler warnings.
Stats
Strings	Helper functions for working with strings.
TaskCoordinator	Represents a collection point for various TaskControl instances that need to be waited on and potentially cancelled en mass.
TimeUtil
Triplet<T1,T2,T3>	Utility to handle triplets of objects.
Uris	Functions for working with URIs
UTF8	Utility class for converting strings to and from UTF-8 encoded bytes.
ValueGetter.FromValue<T>

Exception Summary

Exception	Description
ProcessFailureException

Error Summary

Error	Description
ThisShouldNotHappenError

Annotation Types Summary

Annotation Type	Description
Service.Implementation	Designates that a class implements the specified service and should be added to the services listings file (META-INF/services/[service-name]).

Package org.neo4j.helpers Description

Common Java utilities. A collection of useful utilities which you very often find yourself needing, but you can't (as of yet) find in the core Java SDK.