it.uniroma2.sag.kelp.data.representation.tree.utils

Class TreeIO

java.lang.Object

it.uniroma2.sag.kelp.data.representation.tree.utils.TreeIO

public class TreeIO
extends Object

Parse a tree in a string format.

Author:

Danilo Croce, Giuseppe Castellucci

Field Summary

Fields

Modifier and Type	Field and Description
static String	INDENTIFIER
static char	LRB The left parenthesis character within the tree
static char	RRB The right parenthesis character within the tree

Constructor Summary

Constructors

Constructor and Description
TreeIO()

Method Summary

Methods

Modifier and Type	Method and Description
protected TreeNode	_parseCharniakSentence(String sentence, TreeNode father, Integer nodeCounter) This recursive function allows to read the tree encoded in a string in the parentheses form, such as (S(NP)(VP))
protected String	_preprocess(String inputString) This function cleans the input string, such as from spaces, before the parsing phase.
TreeNode	parseCharniakSentence(String sentence) This method allows to read a tree in the form (S(NP)(VP)) and returns the TreeNode corresponding to the root of the tree
protected TreeNode	parseNode(int nodeCounter, String nodeStr, TreeNode father)

Methods inherited from class java.lang.Object

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

Field Detail

INDENTIFIER

public static final String INDENTIFIER

See Also:

Constant Field Values

LRB

public static final char LRB

The left parenthesis character within the tree

See Also:

Constant Field Values

RRB

public static final char RRB

The right parenthesis character within the tree

See Also:

Constant Field Values

Constructor Detail

TreeIO

public TreeIO()

Method Detail

parseCharniakSentence

public TreeNode parseCharniakSentence(String sentence)
                               throws TreeIOException

This method allows to read a tree in the form (S(NP)(VP)) and returns the TreeNode corresponding to the root of the tree

Parameters:

sentence - The input String

Returns:

The TreeNode corresponding to the root of the tree

Throws:

TreeIOException - his exception is thrown if any problem in the tree IO phase is experimented

_parseCharniakSentence

protected TreeNode _parseCharniakSentence(String sentence,
                              TreeNode father,
                              Integer nodeCounter)
                                   throws TreeIOException

This recursive function allows to read the tree encoded in a string in the parentheses form, such as (S(NP)(VP))

Parameters:

sentence -

father -

nodeCounter -

Returns:

Throws:

TreeIOException

parseNode

protected TreeNode parseNode(int nodeCounter,
                 String nodeStr,
                 TreeNode father)
                      throws InstantiationException

Throws:

InstantiationException

_preprocess

protected String _preprocess(String inputString)

This function cleans the input string, such as from spaces, before the parsing phase.

Parameters:

inputString - The input String to be cleaned

Returns:

The cleaned String