de.ls5.jlearn.oracles
Class CacheOracle

java.lang.Object
  de.ls5.jlearn.oracles.CacheOracle

All Implemented Interfaces:

Cache, FilterStickyOutput, Oracle, Serializable

public class CacheOracle
extends Object
implements Oracle, Cache, FilterStickyOutput

Author:

merten

See Also:

Serialized Form

Constructor Summary

CacheOracle(Oracle oracle)

Method Summary

void	addEntry(Word word, Word symbols) Adds a query/answer pair to the cache
void	addStickySymbol(Symbol symbol) Specify output symbols that once encountered by a prefix will stay the same despite any possible suffix
Word	getEntries(Word word)
boolean	isCached(Word trace) Checks if a given query is already included in the cache
Word	processQuery(Word trace) Process an incoming sequence (word) of input symbols and return a sequence (word) of output symbols produced as reacion to the input symbols.
void	setDFAModeEnabled(boolean dfaMode)
void	setOracle(Oracle oracle) Specifies Oracle to be called if a cache-miss is encountered

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheOracle

public CacheOracle(Oracle oracle)

Method Detail

setOracle

public void setOracle(Oracle oracle)

Description copied from interface: Cache

Specifies Oracle to be called if a cache-miss is encountered

Specified by:

setOracle in interface Cache

Parameters:

oracle - Oracle to be consulted if a query is not included in the cache

processQuery

public Word processQuery(Word trace)
                  throws LearningException

Description copied from interface: Oracle

Process an incoming sequence (word) of input symbols and return a sequence (word) of output symbols produced as reacion to the input symbols.

Specified by:

processQuery in interface Oracle

Parameters:

trace - Word object respresenting the query the system is supposed to process

Returns:

Word object with the system's response to the provide query

Throws:

LearningException

addEntry

public void addEntry(Word word,
                     Word symbols)
              throws ObservationConflictException

Description copied from interface: Cache

Adds a query/answer pair to the cache

Specified by:

addEntry in interface Cache

Parameters:

word - query to be cached

symbols - response for the query to be cached

Throws:

ObservationConflictException - will be thrown if the query is already included in the cache, but with a different answer

getEntries

public Word getEntries(Word word)

addStickySymbol

public void addStickySymbol(Symbol symbol)

Description copied from interface: FilterStickyOutput

Specify output symbols that once encountered by a prefix will stay the same despite any possible suffix

Specified by:

addStickySymbol in interface FilterStickyOutput

isCached

public boolean isCached(Word trace)

Description copied from interface: Cache

Checks if a given query is already included in the cache

Specified by:

isCached in interface Cache

Parameters:

trace - query to be checked

Returns:

boolean value indicating if the provided query would give a cache hit

setDFAModeEnabled

public void setDFAModeEnabled(boolean dfaMode)