dk.rode.thesis.chainofresponsibility
Class LetterCaseHandler

java.lang.Object
  dk.rode.thesis.chainofresponsibility.CharacterHandler
      dk.rode.thesis.chainofresponsibility.LetterCaseHandler

All Implemented Interfaces:

Handler<Character>

@Participant(value="ConcreteHandler")
public class LetterCaseHandler
extends CharacterHandler

A letter case handler is a handler that can handle letter characters in either upper or lower case only.

Author:

Gunni Rode / rode.dk

See Also:

Letter.isUpperCase(), Letter.isLowerCase()

Field Summary

private boolean

upperCase True for upper case only, false for lower case only.

Constructor Summary

LetterCaseHandler(boolean upperCase)
Constructor.

LetterCaseHandler(HandlerChain<Character> chain, boolean upperCase)
Constructor, which registers this letter handler to the handler chain supplied as chain.

Method Summary

protected boolean

handle(Character character) Returns true if this handler can and have handled character, false if not.

Methods inherited from class dk.rode.thesis.chainofresponsibility.CharacterHandler

handle, register, toString

Methods inherited from class java.lang.Object

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

Field Detail

upperCase

private final boolean upperCase

True for upper case only, false for lower case only.

Constructor Detail

LetterCaseHandler

public LetterCaseHandler(boolean upperCase)

Constructor.

This handler is not registered to any handler chain until specifically registered using the CharacterHandler.register(HandlerChain) method.

Parameters:

upperCase - True for upper case only, false for lower case only.

LetterCaseHandler

public LetterCaseHandler(HandlerChain<Character> chain,
                         boolean upperCase)

Constructor, which registers this letter handler to the handler chain supplied as chain.

Parameters:

chain - The handler chain; cannot be null.

upperCase - True for upper case only, false for lower case only.

Throws:

NullPointerException - If chain is null.

Method Detail

handle

protected boolean handle(Character character)

Description copied from class: CharacterHandler

Returns true if this handler can and have handled character, false if not.

Specified by:

handle in class CharacterHandler

Parameters:

character - The character; can be null.

Returns:

True if character was handled, false if not.