edu.stanford.nlp.trees
Interface TreeTransformer

public interface TreeTransformer

This is a simple interface for a function that alters a local Tree.

Method Summary

Tree	transformTree(Tree t, TreeFactory tf) Does whatever one needs to do to a particular tree.

Method Detail

transformTree

public Tree transformTree(Tree t,
                          TreeFactory tf)

Does whatever one needs to do to a particular tree. This routine is parsed 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.

Parameters:

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

tf - The TreeFactory which may be used for creating new nodes for the returned Tree. If the particular implementation never actually creates new nodes, then it is acceptable to pass null as this second argument

Returns:

the transformed Tree