monq.jfa.actions

Class TailContextN

java.lang.Object

monq.jfa.AbstractFaAction

monq.jfa.actions.TailContextN

All Implemented Interfaces:

java.io.Serializable, FaAction

public class TailContextN
extends AbstractFaAction

implements an FaAction which pushes a trailing context back into the input and then calls a client action. into two fixed strings.

Version:

$Revision: 1.5 $, $Date: 2005-07-08 13:01:26 $

Author:

© 2005 Harald Kirsch

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
TailContextN(int n) creates an FaAction to push back the given number of characters into the input and leaves the rest of the match untouched.
TailContextN(int n, FaAction client) creates an FaAction to push back the given number of characters into the input and then calls the given action.

Method Summary

Modifier and Type	Method and Description
void	invoke(java.lang.StringBuilder out, int start, DfaRun r) is called by methods of DfaRun in case of a match.

Methods inherited from class monq.jfa.AbstractFaAction

mergeWith, setPriority

Methods inherited from class java.lang.Object

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

Constructor Detail

TailContextN

public TailContextN(int n,
                    FaAction client)

creates an FaAction to push back the given number of characters into the input and then calls the given action.

Parameters:

n - is the number of characters to push back. This must ≥0. While n==0 is allowed, it is obviously a waste of time.

client - is the action to call. It may be null which is equivalent to Copy.

TailContextN

public TailContextN(int n)

creates an FaAction to push back the given number of characters into the input and leaves the rest of the match untouched. When the callback is called, there must be enough characters to push back.

Method Detail

invoke

public void invoke(java.lang.StringBuilder out,
                   int start,
                   DfaRun r)
            throws CallbackException

Description copied from interface: FaAction

is called by methods of DfaRun in case of a match. Parameter yytext contains the matching text from position start onwards. The callback may change the whole of yytext, but the under most circumstances, only the matching text should be changed. Parameter runner is the DfaRun object which called this function. Of interest are its fields DfaRun.clientData and DfaRun.collect.

Throws:

CallbackException