uk.ac.ed.epcc.webapp

Interface Summary
Interface	Description
AppContextCleanup	Objects stored in an `AppContext` that call a cleanup as part of `AppContext.close()` These can be attributes or `AppContextService`
AppContextService<X extends AppContextService<X>>	Interface for Services stored in an AppContext.
Contexed	Interface for objects that can provide an AppContext.
ContextCached	Marker interface for objects where only a single instance should exist per AppContext.
ContextIndexed	Interface for objects like DataObject that are identified by an index and hold a reference to the AppContext.
Indexed	Interface for objects that can provide a unique positive id number.
SetMap<K,V>	Helper interface for Maps containing sets
Setting<V>	A `Setting` is a configuration parameter with a fixed set of valid values and encapsulted in a model object (usually a singleton) This can either be a configuration parameter that changes the or a user preference of some sort.
Tagged	Interface for `Contexed` objects that can be queried for their configuration tag.
Targetted<T>	Object with a target type that can be queried at run-time.

Class Summary
Class	Description
AbstractConstructedObjectList<L>	A `LinkedList` of objects that is populated from configuration parameters.
AbstractContexed	A simple implementation of `Contexed` This can be used as abase class by objects that would otherwise extend Object slightly reducing the boiler plate needed to implement `Contexed`.
AbstractSetting<V>
AbstractTaggedContexed
AppContext	The `AppContext` is used to encapsulate the runtime environment.
AsciiConverter
AverageValue	A Number that represents an average value.
ClassTableCreator	Created documentation tables of configured classes.
CleanupService	A `CleanupService` implements deferred actions to be performed later (usually when the `AppContext` is closed.
CodeComparator	Comparator for code strings.
CurrentTimeService	An `AppContextService` that returns the current time.
DistinctCount<D>
EmptyIterable<T>	An always empty Iterable
EmptyIterator<E>	An always empty iterator
EnumSetting<E extends java.lang.Enum>	A `EnumSetting` represents optional feature in the code.
Feature	A `Feature` represents optional feature in the code.
HashSetMap<K,V>	A `SetMap` based on `LinkedHashMap`
LazyObjectCreator<A>	This is a lazy evaluated wrapper round the AppContext.makeObject call This allows object construction to be deferred until required.
MedianValue	A simple class to calculate median values.
NumberOp	Class for implementing operations on objects of type java.lang.Number performing automatic type promotion as required.
PropertyExpander	Recursively expand `Properties` into text.
StringObjectComparator<T>	A `Comparator` that compares Strings as well as another type.
StringSetting	A `StringSetting` represents optional feature in the code.
UnitDisplayFormat	A NumberFormat for storage units for displaying arbitrary values The largest unit that is less than the value is used by default.
UnitFormat	A `NumberFormat` for `Units` intended for setting/editing quota values.

Enum Summary
Enum Description

CalendarField
Enum representing Calendar fields in order of significance.

Units
Enum for standard storage units.

Enum Summary
Enum	Description
CalendarField	Enum representing Calendar fields in order of significance.
Units	Enum for standard storage units.

Annotation Types Summary
Annotation Type	Description
Description	A Run-time annotation giving a brief description of a type for run-time reflection based documentation.
PreRequisiteService	An annotation that defines services that are required by an AppContextService.
Version	Deprecated

Package uk.ac.ed.epcc.webapp Description

This package contains reusable classes that may be part of more than one web application.

These classes should therefore not reference particular parts of a web-apps logic but they may represent generally useful concepts.

The most important class to understand is AppContext