Package edu.stanford.nlp.util

Class StringParsingTask<E>

java.lang.Object

edu.stanford.nlp.util.StringParsingTask<E>

public abstract class StringParsingTask<E>
extends Object

An instantiation of this abstract class parses a String and returns an object of type E. It's called a StringParsingTask (rather than StringParser) because a new instance is constructed for each String to be parsed. We do this to be thread-safe: methods in StringParsingTask share state information (e.g. current string index) via instance variables.

Author:

Bill MacCartney

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StringParsingTask.ParserException

Field Summary

Fields

Modifier and Type	Field	Description
protected int	index
protected boolean	isEOF
protected String	s

Constructor Summary

Constructors

Constructor	Description
StringParsingTask(String s)	Constructs a new StringParsingTask from the specified String.

Method Summary

Modifier and Type	Method	Description
protected boolean	isDot(char ch)
protected boolean	isEOF()
protected boolean	isLeftParen(char ch)
protected boolean	isPunct(char ch)
protected boolean	isRightParen(char ch)
protected boolean	isWhiteSpace(char ch)
abstract E	parse()	Parses the String associated with this StringParsingTask and returns a object of type E.
protected char	peek()
protected char	read()
protected void	readDot()
protected String	readJavaIdentifier()
protected void	readLeftParen()
protected String	readName()	Reads characters until isWhiteSpace(ch)or isPunct(ch) or isEOF().
protected void	readRightParen()
protected void	readWhiteSpace()
protected void	unread()

Methods inherited from class java.lang.Object

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

Field Detail

s

protected String s

index

protected int index

isEOF

protected boolean isEOF

Constructor Detail

StringParsingTask

public StringParsingTask(String s)

Constructs a new StringParsingTask from the specified String. Derived class constructors should be sure to call super(s)!

Method Detail

parse

public abstract E parse()

Parses the String associated with this StringParsingTask and returns a object of type E.

readName

protected String readName()

Reads characters until isWhiteSpace(ch)or isPunct(ch) or isEOF(). You may need to override the definition of isPunct(ch) to get this to work right.

readJavaIdentifier

protected String readJavaIdentifier()

readLeftParen

protected void readLeftParen()

readRightParen

protected void readRightParen()

readDot

protected void readDot()

readWhiteSpace

protected void readWhiteSpace()

read

protected char read()

unread

protected void unread()

peek

protected char peek()

isEOF

protected boolean isEOF()

isWhiteSpace

protected boolean isWhiteSpace(char ch)

isPunct

protected boolean isPunct(char ch)

isLeftParen

protected boolean isLeftParen(char ch)

isRightParen

protected boolean isRightParen(char ch)

isDot

protected boolean isDot(char ch)