Package org.chenile.owiz.impl

Class ChainContext<InputType>

java.lang.Object

org.chenile.owiz.impl.ChainContext<InputType>

Type Parameters:

InputType -

public class ChainContext<InputType>
extends Object

This class is used by FilterChain. This is passed as part of the context. (by classes implementing ChainContextContainer) The class allows a Command which is called by the FilterChain to pass control to the commands that are downstream from it. The doContinue() executes the downstream commands. This method will be recursively called till the last command is executed in the Chain.

This context also can roll back the Commands that have already been called if required by using the savePoint() and resumeFromSavedPoint(SavePoint) methods.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ChainContext.SavePoint	This class specifies a save point.

Field Summary

Fields

Modifier and Type	Field	Description
private List<Command<InputType>>	commands
private Object	context
private int	index

Constructor Summary

Constructors

Constructor	Description
ChainContext(List<Command<InputType>> commands, Object context)

Method Summary

Modifier and Type	Method	Description
void	doContinue()	Designed to be called again and again till the chain stops
void	resumeFromSavedPoint(ChainContext.SavePoint savedPoint)
ChainContext.SavePoint	savePoint()

Methods inherited from class java.lang.Object

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

Field Details

commands

private List<Command<InputType>> commands

context

private Object context

index

private int index

Constructor Details

ChainContext

public ChainContext(List<Command<InputType>> commands,
 Object context)

Method Details

savePoint

public ChainContext.SavePoint savePoint()

resumeFromSavedPoint

public void resumeFromSavedPoint(ChainContext.SavePoint savedPoint)
                          throws Exception

Throws:

Exception

doContinue

public void doContinue()
                throws Exception

Designed to be called again and again till the chain stops

Throws:

Exception - .