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package data;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Scanner;
public class Corpus {
public static final String alphaFilename="../posdata/corpus.alphabet";
public static final String tagalphaFilename="../posdata/corpus.tag.alphabet";
// public static final String START_SYM="<s>";
public static final String END_SYM="<e>";
public static final String NUM_TOK="<NUM>";
public static final String UNK_TOK="<unk>";
private ArrayList<String[]>sent;
private ArrayList<int[]>data;
public ArrayList<String[]>tag;
public ArrayList<int[]>tagData;
public static boolean convertNumTok=true;
private HashMap<String,Integer>freq;
public HashMap<String,Integer>vocab;
public HashMap<String,Integer>tagVocab;
private int tagV;
private int V;
public static void main(String[] args) {
Corpus c=new Corpus("../posdata/en_test.conll");
System.out.println(
Arrays.toString(c.get(0))
);
System.out.println(
Arrays.toString(c.getInt(0))
);
System.out.println(
Arrays.toString(c.get(1))
);
System.out.println(
Arrays.toString(c.getInt(1))
);
}
public Corpus(String filename,HashMap<String,Integer>dict){
V=0;
tagV=0;
freq=new HashMap<String,Integer>();
tagVocab=new HashMap<String,Integer>();
vocab=dict;
sent=new ArrayList<String[]>();
tag=new ArrayList<String[]>();
Scanner sc=io.FileUtil.openInFile(filename);
ArrayList<String>s=new ArrayList<String>();
// s.add(START_SYM);
while(sc.hasNextLine()){
String line=sc.nextLine();
String toks[]=line.split("\t");
if(toks.length<2){
s.add(END_SYM);
sent.add(s.toArray(new String[0]));
s=new ArrayList<String>();
// s.add(START_SYM);
continue;
}
String tok=toks[1].toLowerCase();
s.add(tok);
}
sc.close();
buildData();
}
public Corpus(String filename){
V=0;
freq=new HashMap<String,Integer>();
vocab=new HashMap<String,Integer>();
tagVocab=new HashMap<String,Integer>();
sent=new ArrayList<String[]>();
tag=new ArrayList<String[]>();
System.out.println("Reading:"+filename);
Scanner sc=io.FileUtil.openInFile(filename);
ArrayList<String>s=new ArrayList<String>();
ArrayList<String>tags=new ArrayList<String>();
//s.add(START_SYM);
while(sc.hasNextLine()){
String line=sc.nextLine();
String toks[]=line.split("\t");
if(toks.length<2){
s.add(END_SYM);
tags.add(END_SYM);
if(s.size()>2){
sent.add(s.toArray(new String[0]));
tag.add(tags.toArray(new String [0]));
}
s=new ArrayList<String>();
tags=new ArrayList<String>();
// s.add(START_SYM);
continue;
}
String tok=toks[1].toLowerCase();
if(convertNumTok && tok.matches(".*\\d.*")){
tok=NUM_TOK;
}
s.add(tok);
if(toks.length>3){
tok=toks[3].toLowerCase();
}else{
tok="_";
}
tags.add(tok);
}
sc.close();
for(int i=0;i<sent.size();i++){
String[]toks=sent.get(i);
for(int j=0;j<toks.length;j++){
addVocab(toks[j]);
addTag(tag.get(i)[j]);
}
}
buildVocab();
buildData();
System.out.println(data.size()+"sentences, "+vocab.keySet().size()+" word types");
}
public String[] get(int idx){
return sent.get(idx);
}
private void addVocab(String s){
Integer integer=freq.get(s);
if(integer==null){
integer=0;
}
freq.put(s, integer+1);
}
public int tokIdx(String tok){
Integer integer=vocab.get(tok);
if(integer==null){
return V;
}
return integer;
}
public int tagIdx(String tok){
Integer integer=tagVocab.get(tok);
if(integer==null){
return tagV;
}
return integer;
}
private void buildData(){
data=new ArrayList<int[]>();
for(int i=0;i<sent.size();i++){
String s[]=sent.get(i);
data.add(new int [s.length]);
for(int j=0;j<s.length;j++){
data.get(i)[j]=tokIdx(s[j]);
}
}
tagData=new ArrayList<int[]>();
for(int i=0;i<tag.size();i++){
String s[]=tag.get(i);
tagData.add(new int [s.length]);
for(int j=0;j<s.length;j++){
tagData.get(i)[j]=tagIdx(s[j]);
}
}
}
public int [] getInt(int idx){
return data.get(idx);
}
/**
*
* @return size of vocabulary
*/
public int getVocabSize(){
return V;
}
public int [][]getAllData(){
return data.toArray(new int [0][]);
}
public int [][]getTagData(){
return tagData.toArray(new int [0][]);
}
private void buildVocab(){
for (String key:freq.keySet()){
if(freq.get(key)>2){
vocab.put(key, V);
V++;
}
}
io.SerializedObjects.writeSerializedObject(vocab, alphaFilename);
io.SerializedObjects.writeSerializedObject(tagVocab,tagalphaFilename);
}
private void addTag(String tag){
Integer i=tagVocab.get(tag);
if(i==null){
tagVocab.put(tag, tagV);
tagV++;
}
}
}
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