org.micropsi.comp.console
Class QuestionCache

java.lang.Object
  org.micropsi.comp.console.QuestionCache

public class QuestionCache

extends java.lang.Object

A class for caching @see CachedQuestion.

Field Summary

static int	INITIAL_SIZE
static int	MAX_SIZE The maximal size of the cache.

Constructor Summary

protected

QuestionCache()

Method Summary

void	addQuestion(CachedQuestion q, CachedAnswer a) Method addQuestion.
AnswerIF	findAnswer(CachedQuestion q) Method findAnswer.
static QuestionCache	getInstance() Method getInstance.
int	getSize()

Methods inherited from class java.lang.Object

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

Field Detail

MAX_SIZE

public static int MAX_SIZE

The maximal size of the cache.

INITIAL_SIZE

public static int INITIAL_SIZE

Constructor Detail

QuestionCache

protected QuestionCache()

Method Detail

getInstance

public static QuestionCache getInstance()

Method getInstance. Creates the QuestionCache if it is inexistant. Returns it.

Returns:

QuestionCache - The instance.

getSize

public int getSize()

findAnswer

public AnswerIF findAnswer(CachedQuestion q)

Method findAnswer. Returns a previously cached answer.

Parameters:

q - - The question to be answered.

Returns:

AnswerIF - The answer, if it is cached, null otherwise.

addQuestion

public void addQuestion(CachedQuestion q,
                        CachedAnswer a)

Method addQuestion. Adds a question (and its answer) to the cache. If the size of the cache is larger than @see #MAX_SIZE, the eldest question is deleted. If an answer to the same question exists, it is (hopefully) deleted, so we always keep the newest information.

Parameters:

q - - The Question.

a - - Its answer.