Package eu.bandm.tools.lexic

Class LookaheadTokenMultiplexer<K,D,T,L>

java.lang.Object

eu.bandm.tools.lexic.LookaheadTokenMultiplexer<K,D,T,L>

All Implemented Interfaces:

LookaheadTokenSource<D,T,L>, Supplier<Token<D,T>>

public class LookaheadTokenMultiplexer<K,D,T,L>
extends Object
implements LookaheadTokenSource<D,T,L>

Constructor Summary

Constructors

Constructor	Description
LookaheadTokenMultiplexer(K key, LookaheadTokenSource<D,T,L> channel)

Method Summary

Modifier and Type	Method	Description
Token<D,T>	get()
LookaheadTokenSource<D,T,L>	getCurrentChannel()
K	getCurrentKey()
LookaheadTokenMultiplexer<K,D,T,L>	put(K key, LookaheadTokenSource<D,T,L> channel)
L	relinquishLookahead()	Clear the internal lookahead buffer and return its contents.
void	select(K key)
void	takeOverLookahead(L lookaheadData)	Fill the internal lookahead buffer with data.

Methods inherited from class java.lang.Object

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

Methods inherited from interface eu.bandm.tools.lexic.LookaheadTokenSource

forgetLookahead, removeTypes, removeTypes

Constructor Details

LookaheadTokenMultiplexer

public LookaheadTokenMultiplexer(K key,
 LookaheadTokenSource<D,T,L> channel)

Method Details

put

public LookaheadTokenMultiplexer<K,D,T,L> put(K key,
 LookaheadTokenSource<D,T,L> channel)

getCurrentKey

public K getCurrentKey()

getCurrentChannel

public LookaheadTokenSource<D,T,L> getCurrentChannel()

select

public void select(K key)

get

public Token<D,T> get()

Specified by:

get in interface Supplier<K>

relinquishLookahead

public L relinquishLookahead()

Description copied from interface: LookaheadTokenSource

Clear the internal lookahead buffer and return its contents.

Specified by:

relinquishLookahead in interface LookaheadTokenSource<K,D,T>

Returns:

the former contents of the internal lookahead buffer

takeOverLookahead

public void takeOverLookahead(L lookaheadData)

Description copied from interface: LookaheadTokenSource

Fill the internal lookahead buffer with data.

The buffer must be empty before this method is invoked. After return, the given data will be consumed from the buffer before the usual input is considered.

Specified by:

takeOverLookahead in interface LookaheadTokenSource<K,D,T>

Parameters:

lookaheadData - the lookahead data to fill in