/*?AlnLoader.java
?*?==============
?*?Mike?Jahr?8/16/99
?*?Machine?Translation?group?WS99
?*?Center?for?Language?and?Speech?Processing
?*/

import?java.net.URL;
import?java.io.*;
import?javax.swing.SwingUtilities;

/**
?*?Thread?class?responsible?for?loading?an?alignment?file.
?*?AlnLoader?knows?the?“.aln“?format?and?given?the?url?of?a
?*?file?can?load?it?into?a?given?translation?object.?It?reports?any
?*?errors?it?encounters?via?the?{@link?Cairo#ReportError（String）
?*?Cairo.ReportError}?method.
?*?@author?Mike?Jahr
?*?@see?Cairo
?*?@see?Translation
?*/
public?class?AlnLoader?extends?Thread?{
????
????//????public?static?String?FILE_SUFFIX?=?“.aln“;
????private?Cairo?c;
????private?Translation?trans;
????private?URL?url;
????
????/**
?????*?Creates?a?loader?with?the?given?specifications.
?????*?@see?Cairo#openURL（URL）
?????*/
????public?AlnLoader（Cairo?inc?Translation?intrans?URL?inurl）?{
	super（）;
	c?=?inc;
	trans?=?intrans;
	url?=?inurl;
????}
????
????/**
?????*?Attempts?to?open?an?alignment?file?specified?by?the?URL?in?the
?????*?constructor?into?the?translation?object.
?????*/?
????public?void?run（）?{
	//DBG*/c.ReportError（“started?run“）;
	
	//?if?there‘s?already?a?load?thread?running?we?must?wait?for?it.
	try?{
	????Thread?t?=?c.getLoadThread（）;
	????if?（t?!=?null?&&?t.isAlive（））?{
		t.interrupt（）;
		t.join（）;
	????}
	}?catch?（InterruptedException?ie）?{
	????return;
	}
	
	c.setLoadThread（this）;
	
	StreamTokenizer?st?=?null;
	try?{
	????st?=?makeTokenizer（null）;
	}?catch?（IOException?ioe）?{
	????c.ReportError（“I/O?error?with?alignment?file:?“?+?ioe.getMessage（））;
	????c.setLoadThread（null）;
	????return;
	}
	//DBG*/c.ReportError（“made?tokenizer“）;	
	try?{
	????int?curtag?=?-1;
	????
	????trans.clear（）;
	????
	????while?（!isInterrupted（））?{
		try?{
		????curtag?=?nextTag（st?curtag）;
		????//DBG*/System.err.println（“got?tag?“?+?curtag?+?“:“?+?openTag（curtag））;
		????
		????if?（st.ttype?==?st.TT_EOF）
			break;
		????
		????switch?（curtag）?{
		????case?HEADER:
			if?（trans.encoding?==?null）?{
			????//boolean?first?=?（trans.encoding?==?null）;
			????trans.readHeader（st）;
			????
			????if?（trans.encoding?!=?null）
				st?=?makeTokenizer（trans.encoding）;
			}
			break;???????//?“
“
		????case?SOURCE_SENTENCE:
			trans.source.readWords（st）;
			break;???????//?““
		????case?TARGET_SENTENCE:
			trans.target.readWords（st）;
			break;???????//?““;
		????case?ALIGNMENT:
			trans.web.readAlignment（st）;
			break;???????//?““;
		????case?ASCII:
			break;???????//?““;
		????case?PROBABILITY:
			trans.target.readProb（st）;
			break;???????//?““;
		????case?NULL_FERTILITY:
			trans.NULL_WORD.readProb（st）;
			break;???????//?““;
		????case?FERTILITIES:
			trans.target.readFertility（st?true）;
			break;???????//?““;
		????case?ALT_FERTILITIES:
			trans.target.readFertility（st?false）;
			break;???????//?““;
		????case?DISTORTI