edu.stanford.nlp.trees
Class LabeledScoredTreeLeaf

java.lang.Object
  java.util.AbstractCollection
      edu.stanford.nlp.trees.Tree
          edu.stanford.nlp.trees.LabeledScoredTreeLeaf

All Implemented Interfaces:

Label, Labeled, Scored, Serializable, Iterable, Collection

public class LabeledScoredTreeLeaf
extends Tree

A LabeledScoredTreeLeaf represents the leaf of a tree in a parse tree with labels and scores.

Author:

Christopher Manning

See Also:

Serialized Form

Field Summary

Fields inherited from class edu.stanford.nlp.trees.Tree

ZEROCHILDREN

Constructor Summary

LabeledScoredTreeLeaf()
Create an empty leaf parse tree with an empty word.

LabeledScoredTreeLeaf(Label label)
Create a leaf parse tree with given word.

LabeledScoredTreeLeaf(Label label, double score)
Create a leaf parse tree with given word and score.

Method Summary

Tree[]	children() Leaves have no children.
static TreeFactory	factory() Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type.
static TreeFactory	factory(LabelFactory lf) Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type, with the Label made with the supplied LabelFactory.
boolean	isLeaf() Indicates that this is a leaf.
Label	label() Returns the label associated with the current node.
double	score() Returns the node's score.
void	setChildren(Tree[] children) Leaves have no children.
void	setLabel(Label label) Sets the label associated with the current node, if there is one.
void	setScore(double score) Sets the score associated with the current node, if there is one.
String	toString() Convert tree leaf to its label's string.
StringBuffer	toStringBuffer(StringBuffer sb) Appends the printed form of a parse tree (as a bracketed String) to a StringBuffer.
TreeFactory	treeFactory() Return a TreeFactory that produces trees of the same type as the current Tree.

Methods inherited from class edu.stanford.nlp.trees.Tree

addChild, addChild, ancestor, cCommands, constituents, constituents, deepCopy, deepCopy, deeperCopy, deeperCopy, dependencies, dependencies, dependencies, dependencies, depth, dominates, dominationPath, equals, firstChild, flatten, flatten, getChild, getChildrenAsList, getLeaves, getLeaves, getSpan, hashCode, headPreTerminal, headTerminal, indentedListPrint, indentedListPrint, indexOf, insertDtr, isPhrasal, isPrePreTerminal, isPreTerminal, isUnaryRewrite, iterator, joinNode, labelFactory, labels, lastChild, leftCharEdge, localTree, nodeString, numChildren, parent, parent, pathNodeToNode, pennPrint, pennPrint, pennPrint, pennString, percolateHeads, preTerminalYield, preTerminalYield, printLocalTree, printLocalTree, prune, prune, removeChild, rightCharEdge, setChild, setChildren, setFromString, setLabels, setSpans, setValue, siblings, size, spliceOut, spliceOut, subTreeList, subTrees, subTrees, taggedDependencies, taggedDependencies, taggedDependencies, taggedDependencies, taggedYield, taggedYield, transform, transform, typedDependencies, typedDependenciesCollapsed, typedDependenciesCollapsed, upperMostUnary, value, valueOf, valueOf, yield, yield

Methods inherited from class java.util.AbstractCollection

add, addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LabeledScoredTreeLeaf

public LabeledScoredTreeLeaf()

Create an empty leaf parse tree with an empty word.

LabeledScoredTreeLeaf

public LabeledScoredTreeLeaf(Label label)

Create a leaf parse tree with given word.

Parameters:

label - the Label representing the word for this new tree leaf.

LabeledScoredTreeLeaf

public LabeledScoredTreeLeaf(Label label,
                             double score)

Create a leaf parse tree with given word and score.

Parameters:

label - The Label representing the word for

score - The score for the node this new tree leaf.

Method Detail

isLeaf

public boolean isLeaf()

Indicates that this is a leaf. CHRIS: is adding this actually a speed-up or a slowdown? Check!

Overrides:

isLeaf in class Tree

Returns:

Whether this is a leaf node

children

public Tree[] children()

Leaves have no children.

Specified by:

children in class Tree

Returns:

a unique zero-length Tree[]

See Also:

Tree.getChildrenAsList()

setChildren

public void setChildren(Tree[] children)

Leaves have no children. Returns an UnsupportedOperationException

Overrides:

setChildren in class Tree

Parameters:

children - The children for the node

See Also:

Tree.setChildren(List)

toString

public String toString()

Convert tree leaf to its label's string.

Specified by:

toString in interface Label

Overrides:

toString in class Tree

Returns:

Node's label in String form

toStringBuffer

public StringBuffer toStringBuffer(StringBuffer sb)

Appends the printed form of a parse tree (as a bracketed String) to a StringBuffer.

Overrides:

toStringBuffer in class Tree

Parameters:

sb - An input StringBuffer which is appended to

Returns:

StringBuffer returns the StringBuffer

label

public Label label()

Returns the label associated with the current node.

Specified by:

label in interface Labeled

Overrides:

label in class Tree

Returns:

The label associated with the current node, or null if there is no label

setLabel

public void setLabel(Label label)

Sets the label associated with the current node, if there is one.

Specified by:

setLabel in interface Labeled

Overrides:

setLabel in class Tree

Parameters:

label - The label of the node

score

public double score()

Returns the node's score.

Specified by:

score in interface Scored

Overrides:

score in class Tree

Returns:

The score associated with the current node, or NaN if there is no score

setScore

public void setScore(double score)

Sets the score associated with the current node, if there is one.

Overrides:

setScore in class Tree

Parameters:

score - Score of node

treeFactory

public TreeFactory treeFactory()

Return a TreeFactory that produces trees of the same type as the current Tree. That is, this implementation, will produce trees of type LabeledScoredTree(Node|Leaf). The Label of this is examined, and providing it is not null, a LabelFactory which will produce that kind of Label is supplied to the TreeFactory. If the Label is null, a StringLabelFactory will be used. The factories returned on different calls a different: a new one is allocated each time.

Specified by:

treeFactory in class Tree

Returns:

a factory to produce labeled, scored trees

factory

public static TreeFactory factory()

Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type. The factory returned is always the same one (a singleton).

Returns:

a factory to produce labeled, scored trees

factory

public static TreeFactory factory(LabelFactory lf)

Return a TreeFactory that produces trees of the LabeledScoredTree{Node|Leaf} type, with the Label made with the supplied LabelFactory. The factory returned is a different one each time

Parameters:

lf - The LabelFactory to use

Returns:

a factory to produce labeled, scored trees