edu.stanford.nlp.parser.lexparser

Class BoundaryRemover

java.lang.Object

edu.stanford.nlp.parser.lexparser.BoundaryRemover

All Implemented Interfaces:

TreeTransformer

public class BoundaryRemover
extends Object
implements TreeTransformer

Removes a boundary symbol (Lexicon.BOUNDARY_TAG or Lexicon.BOUNDARY), which is the rightmost daughter of a tree. Otherwise does nothing. This is needed because the dependency parser uses such symbols.

Note: This method is a function and not destructive. A new root tree is returned.

Author:

Christopher Manning

Constructor Summary

Constructors

Constructor and Description
BoundaryRemover()

Method Summary

Methods

Modifier and Type	Method and Description
Tree	transformTree(Tree tree) Does whatever one needs to do to a particular tree.

Methods inherited from class java.lang.Object

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

Constructor Detail

BoundaryRemover

public BoundaryRemover()

Method Detail

transformTree

public Tree transformTree(Tree tree)

Description copied from interface: TreeTransformer

Does whatever one needs to do to a particular tree. This routine is passed a whole Tree, and could itself work recursively, but the canonical usage is to invoke this method via the Tree.transform() method, which will apply the transformer in a bottom-up manner to each local Tree, and hence the implementation of TreeTransformer should merely examine and change a local (one-level) Tree.

Specified by:

transformTree in interface TreeTransformer

Parameters:

tree - A tree. Classes implementing this interface can assume that the tree passed in is not null.

Returns:

the transformed Tree