org.h2.bnf
Class RuleOptional

java.lang.Object
  extended by org.h2.bnf.RuleOptional
All Implemented Interfaces:
Rule

public class RuleOptional
extends java.lang.Object
implements Rule

Represents an optional BNF rule.


Constructor Summary
RuleOptional(Rule rule)
           
 
Method Summary
 void accept(BnfVisitor visitor)
          Call the visit method in the given visitor.
 boolean autoComplete(Sentence sentence)
          Add the next possible token(s).
 void setLinks(java.util.HashMap<java.lang.String,RuleHead> ruleMap)
          Update cross references.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RuleOptional

public RuleOptional(Rule rule)
Method Detail

accept

public void accept(BnfVisitor visitor)
Description copied from interface: Rule
Call the visit method in the given visitor.

Specified by:
accept in interface Rule
Parameters:
visitor - the visitor

setLinks

public void setLinks(java.util.HashMap<java.lang.String,RuleHead> ruleMap)
Description copied from interface: Rule
Update cross references.

Specified by:
setLinks in interface Rule
Parameters:
ruleMap - the reference map

autoComplete

public boolean autoComplete(Sentence sentence)
Description copied from interface: Rule
Add the next possible token(s). If there was a match, the query in the sentence is updated (the matched token is removed).

Specified by:
autoComplete in interface Rule
Parameters:
sentence - the sentence context
Returns:
true if a full match