up
Class GrammarExtractor

java.lang.Object
  up.DefaultTreeHandler
      up.GrammarExtractor

All Implemented Interfaces:

TreeHandler

public class GrammarExtractor
extends DefaultTreeHandler

Extract a PCFG from a stream of trees.

Constructor Summary

GrammarExtractor()
Constructs a new handler.

Method Summary

void	exit() Notifies the successor of this handler about the end of the stream.
Grammar	getGrammar() Returns the extracted grammar.
void	init() Notifies the successor of this handler about the start of the stream.
void	next(Tree tree) Notifies the successor of this handler about the specified tree.

Methods inherited from class up.DefaultTreeHandler

getSuccessor, setSuccessor

Methods inherited from class java.lang.Object

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

Constructor Detail

GrammarExtractor

public GrammarExtractor()

Constructs a new handler.

Method Detail

getGrammar

public Grammar getGrammar()

Returns the extracted grammar.

Returns:

the grammar extracted by this handler

init

public void init()

Description copied from class: DefaultTreeHandler

Notifies the successor of this handler about the start of the stream.

Specified by:

init in interface TreeHandler

Overrides:

init in class DefaultTreeHandler

next

public void next(Tree tree)

Description copied from class: DefaultTreeHandler

Notifies the successor of this handler about the specified tree.

Specified by:

next in interface TreeHandler

Overrides:

next in class DefaultTreeHandler

Parameters:

tree - the tree about which the successor of this handler is to be notified

exit

public void exit()

Description copied from class: DefaultTreeHandler

Notifies the successor of this handler about the end of the stream.

Specified by:

exit in interface TreeHandler

Overrides:

exit in class DefaultTreeHandler