org.iqual.chaplin
Class AbstractContextHandler

java.lang.Object
  org.iqual.chaplin.AbstractContextHandler

All Implemented Interfaces:

ContextHandler, MessageReceiver

Direct Known Subclasses:

MapContextHandler

public abstract class AbstractContextHandler
extends Object
implements ContextHandler

This abstract class makes a context handler implementation easier by translating from the raw language of messages to more concrete language containing concepts like property and methods.

Since:

Jun 12, 2009 7:28:32 PM

Author:

Zbynek Slajchrt

Constructor Summary

AbstractContextHandler()

Method Summary

protected abstract boolean	canInvoke(Object source, String methodName, Class[] methodDesc) Request for possibility of method invocation.
protected abstract Object	get(String propertyName, Class fieldType, Object instance) Request for value of a property.
protected abstract boolean	hasValue(String propertyName, Class fieldType) Request for existence of a property.
protected abstract boolean	invoke(Object source, String methodName, Class[] methodDesc) Request for the method invocation.
void	onMessageReceived(Message message, MessageReplies replies, MessageReceiversChain chain) Called when a request is made.
protected abstract void	set(String propertyName, Class fieldType, Object value, Object instance) Request for setting the value of a property.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractContextHandler

public AbstractContextHandler()

Method Detail

onMessageReceived

public void onMessageReceived(Message message,
                              MessageReplies replies,
                              MessageReceiversChain chain)
                       throws Throwable

Description copied from interface: MessageReceiver

Called when a request is made. The receiver must call the chain's process method so that the subsequent receivers could be called. The receiver may manipulate with the arguments passed to that method. For example it may change the message that will be processed by the subsequent receivers in the chain or change the results of the subsequent message processing.

Specified by:

onMessageReceived in interface MessageReceiver

Throws:

Throwable

hasValue

protected abstract boolean hasValue(String propertyName,
                                    Class fieldType)
                             throws Exception

Request for existence of a property.

Throws:

Exception

get

protected abstract Object get(String propertyName,
                              Class fieldType,
                              Object instance)
                       throws Exception

Request for value of a property.

Throws:

Exception

set

protected abstract void set(String propertyName,
                            Class fieldType,
                            Object value,
                            Object instance)
                     throws Exception

Request for setting the value of a property.

Throws:

Exception

canInvoke

protected abstract boolean canInvoke(Object source,
                                     String methodName,
                                     Class[] methodDesc)
                              throws Exception

Request for possibility of method invocation.

Throws:

Exception

invoke

protected abstract boolean invoke(Object source,
                                  String methodName,
                                  Class[] methodDesc)
                           throws Exception

Request for the method invocation.

Throws:

Exception