edu.stanford.nlp.trees.tregex
Class TregexMatcher

java.lang.Object
  edu.stanford.nlp.trees.tregex.TregexMatcher

public abstract class TregexMatcher
extends Object

A TregexMatcher can be used to match a TregexPattern against a Tree.

Usage should to be the same as Matcher.

@author Galen Andrew

Method Summary

boolean	find() Find the next match of the pattern on the tree
abstract Tree	getMatch() Get the last matching tree.
Tree	getNode(Object name) Returns the node labeled with name in the pattern.
static void	main(String[] args) Look at a bunch of trees and tell where TreePattern and TregexPattern differ at all.
abstract boolean	matches() Does the pattern match the tree? It's actually closer to java.util.regex's "lookingAt" in that the root of the tree has to match the root of the pattern but the whole tree does not have to be "accounted for".
boolean	matchesAt(Tree node) Rests the matcher and tests if it matches on the tree when rooted at node.
void	reset() Resets the matcher so that its search starts over.

Methods inherited from class java.lang.Object

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

Method Detail

reset

public void reset()

Resets the matcher so that its search starts over.

matches

public abstract boolean matches()

Does the pattern match the tree? It's actually closer to java.util.regex's "lookingAt" in that the root of the tree has to match the root of the pattern but the whole tree does not have to be "accounted for". Like with lookingAt the beginning of the string has to match the pattern, but the whole string doesn't have to be "accounted for".

Returns:

whether the tree matches the pattern

matchesAt

public boolean matchesAt(Tree node)

Rests the matcher and tests if it matches on the tree when rooted at node.

Parameters:

node -

Returns:

whether the matcher matches at node

getMatch

public abstract Tree getMatch()

Get the last matching tree. Returns null if there has not been a match.

Returns:

last match

find

public boolean find()

Find the next match of the pattern on the tree

Returns:

whether there is a match somewhere in the tree

getNode

public Tree getNode(Object name)

Returns the node labeled with name in the pattern.

Parameters:

name - the name of the node, specified in the pattern.

Returns:

node labeled by the name

main

public static void main(String[] args)
                 throws Exception

Look at a bunch of trees and tell where TreePattern and TregexPattern differ at all. Use the -p option for hand-specifying the pattern.

Parameters:

args - TreebankPath, RangesFilter

Throws:

Exception