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package phrase;
import io.FileUtil;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;
public class PhraseCorpus
{
public HashMap<String,Integer>wordLex;
public HashMap<String,Integer>phraseLex;
public String wordList[];
public String phraseList[];
//data[phrase][num context][position]
public int data[][][];
public int numContexts;
public PhraseCorpus(String filename) throws FileNotFoundException, IOException
{
BufferedReader r = FileUtil.reader(new File(filename));
phraseLex=new HashMap<String,Integer>();
wordLex=new HashMap<String,Integer>();
ArrayList<int[][]>dataList=new ArrayList<int[][]>();
String line=null;
numContexts = 0;
while((line=readLine(r))!=null){
String toks[]=line.split("\t");
String phrase=toks[0];
addLex(phrase,phraseLex);
toks=toks[1].split(" \\|\\|\\| ");
ArrayList <int[]>ctxList=new ArrayList<int[]>();
for(int i=0;i<toks.length;i+=2){
String ctx=toks[i];
String words[]=ctx.split(" ");
if (numContexts == 0)
numContexts = words.length - 1;
else
assert numContexts == words.length - 1;
int []context=new int [numContexts+1];
int idx=0;
for(String word:words){
if(word.equals("<PHRASE>")){
continue;
}
addLex(word,wordLex);
context[idx]=wordLex.get(word);
idx++;
}
String count=toks[i+1];
context[idx]=Integer.parseInt(count.trim().substring(2));
ctxList.add(context);
}
dataList.add(ctxList.toArray(new int [0][]));
}
try{
r.close();
}catch(IOException ioe){
ioe.printStackTrace();
}
data=dataList.toArray(new int[0][][]);
}
private void addLex(String key, HashMap<String,Integer>lex){
Integer i=lex.get(key);
if(i==null){
lex.put(key, lex.size());
}
}
//for debugging
public void saveLex(String lexFilename) throws FileNotFoundException, IOException
{
PrintStream ps = FileUtil.printstream(new File(lexFilename));
ps.println("Phrase Lexicon");
ps.println(phraseLex.size());
printDict(phraseLex,ps);
ps.println("Word Lexicon");
ps.println(wordLex.size());
printDict(wordLex,ps);
ps.close();
}
private static void printDict(HashMap<String,Integer>lex,PrintStream ps){
String []dict=buildList(lex);
for(int i=0;i<dict.length;i++){
ps.println(dict[i]);
}
}
public void loadLex(String lexFilename){
Scanner sc=io.FileUtil.openInFile(lexFilename);
sc.nextLine();
int size=sc.nextInt();
sc.nextLine();
String[]dict=new String[size];
for(int i=0;i<size;i++){
dict[i]=sc.nextLine();
}
phraseLex=buildMap(dict);
sc.nextLine();
size=sc.nextInt();
sc.nextLine();
dict=new String[size];
for(int i=0;i<size;i++){
dict[i]=sc.nextLine();
}
wordLex=buildMap(dict);
sc.close();
}
private HashMap<String, Integer> buildMap(String[]dict){
HashMap<String,Integer> map=new HashMap<String,Integer>();
for(int i=0;i<dict.length;i++){
map.put(dict[i], i);
}
return map;
}
public void buildList(){
if(wordList==null){
wordList=buildList(wordLex);
phraseList=buildList(phraseLex);
}
}
private static String[]buildList(HashMap<String,Integer>lex){
String dict[]=new String [lex.size()];
for(String key:lex.keySet()){
dict[lex.get(key)]=key;
}
return dict;
}
public String getContextString(int context[], boolean addPhraseMarker)
{
StringBuffer b = new StringBuffer();
for (int i=0;i<context.length-1;i++)
{
if (b.length() > 0)
b.append(" ");
if (i == context.length/2)
b.append("<PHRASE> ");
b.append(wordList[context[i]]);
}
return b.toString();
}
public static String readLine(BufferedReader r){
try{
return r.readLine();
}
catch(IOException ioe){
ioe.printStackTrace();
}
return null;
}
public static void main(String[] args) throws Exception
{
String LEX_FILENAME="../pdata/lex.out";
String DATA_FILENAME="../pdata/btec.con";
PhraseCorpus c=new PhraseCorpus(DATA_FILENAME);
c.saveLex(LEX_FILENAME);
c.loadLex(LEX_FILENAME);
c.saveLex(LEX_FILENAME);
}
}
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