org.apache.mina.statemachine.context

Class AbstractStateContextLookup

java.lang.Object

org.apache.mina.statemachine.context.AbstractStateContextLookup

All Implemented Interfaces:

StateContextLookup

Direct Known Subclasses:

IoSessionStateContextLookup

public abstract class AbstractStateContextLookup
extends java.lang.Object
implements StateContextLookup

Abstract StateContextLookup implementation. The lookup(Object[]) method will loop through the event arguments and call the supports(Class) method for each of them. The first argument that this method returns true for will be passed to the abstract lookup(Object) method which should try to extract a StateContext from the argument. If none is found a new StateContext will be created and stored in the event argument using the store(Object, StateContext) method.

Field Summary

Fields

Modifier and Type	Field and Description
private StateContextFactory	contextFactory

Constructor Summary

Constructors

Constructor and Description
AbstractStateContextLookup(StateContextFactory contextFactory) Creates a new instance which uses the specified StateContextFactory to create StateContext objects.

Method Summary

Modifier and Type	Method and Description
protected abstract StateContext	lookup(java.lang.Object eventArg) Extracts a StateContext from the specified event argument which is an instance of a class supports(Class) returns true for.
StateContext	lookup(java.lang.Object[] eventArgs) Searches the arguments from an Event and returns a StateContext if any of the arguments holds one.
protected abstract void	store(java.lang.Object eventArg, StateContext context) Stores a new StateContext in the specified event argument which is an instance of a class supports(Class) returns true for.
protected abstract boolean	supports(java.lang.Class<?> c) Must return true for any Class that this StateContextLookup can use to store and lookup StateContext objects.

Methods inherited from class java.lang.Object

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

Field Detail

contextFactory

private final StateContextFactory contextFactory

Constructor Detail

AbstractStateContextLookup

public AbstractStateContextLookup(StateContextFactory contextFactory)

Creates a new instance which uses the specified StateContextFactory to create StateContext objects.

Parameters:

contextFactory - the factory.

Method Detail

lookup

public StateContext lookup(java.lang.Object[] eventArgs)

Description copied from interface: StateContextLookup

Searches the arguments from an Event and returns a StateContext if any of the arguments holds one. NOTE! This method must create a new StateContext if a compatible object is in the arguments and the next time that same object is passed to this method the same StateContext should be returned.

Specified by:

lookup in interface StateContextLookup

lookup

protected abstract StateContext lookup(java.lang.Object eventArg)

Extracts a StateContext from the specified event argument which is an instance of a class supports(Class) returns true for.

Parameters:

eventArg - the event argument.

Returns:

the StateContext.

store

protected abstract void store(java.lang.Object eventArg,
                              StateContext context)

Stores a new StateContext in the specified event argument which is an instance of a class supports(Class) returns true for.

Parameters:

eventArg - the event argument.

context - the StateContext to be stored.

supports

protected abstract boolean supports(java.lang.Class<?> c)

Must return true for any Class that this StateContextLookup can use to store and lookup StateContext objects.

Parameters:

c - the class.

Returns:

true or false.