com.aptana.ide.editor.js.environment
Class LexemeListWalker

java.lang.Object
  com.aptana.ide.editor.js.environment.LexemeListWalker

Direct Known Subclasses:

JSLexemeListWalker

public abstract class LexemeListWalker
extends java.lang.Object

An abstract class for traversing a list of lexemes and performing a specific operation on each lexeme.

Nested Class Summary

class

LexemeListWalker.AbortException Thrown if we wish to abort the walking operation

Field Summary

protected int	currentIndex The current index we are at
protected LexemeList	lexemeList The list of lexemes
protected int	llSize The cached LexemeList size

Constructor Summary

LexemeListWalker()

Method Summary

protected abstract void	onLexeme(Lexeme lexeme, int index) The method called on each lexeme
int	walkList(IParseState parseState, int startIndex) Walks the list of lexemes, calling "onLexeme" on each one

Methods inherited from class java.lang.Object

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

Field Detail

lexemeList

protected LexemeList lexemeList

The list of lexemes

llSize

protected int llSize

The cached LexemeList size

currentIndex

protected int currentIndex

The current index we are at

Constructor Detail

LexemeListWalker

public LexemeListWalker()

Method Detail

walkList

public int walkList(IParseState parseState,
                    int startIndex)

Walks the list of lexemes, calling "onLexeme" on each one

Parameters:

parseState - The current parse state

startIndex - The lexeme list index at which to begin walking

Returns:

The ending index (generally the last index of the list)

onLexeme

protected abstract void onLexeme(Lexeme lexeme,
                                 int index)
                          throws LexemeListWalker.AbortException

The method called on each lexeme

Parameters:

lexeme - The lexeme to process

index - the index of the lexeme in the lexeme list

Throws:

LexemeListWalker.AbortException - An exception to throw if we wish to abort the walking operation