/**
* This file is part of FNLP (formerly FudanNLP).
*
* FNLP is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FNLP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FudanNLP. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2009-2014 www.fnlp.org. All rights reserved.
*/
package org.fnlp.nlp.similarity.train;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
import org.fnlp.ml.types.alphabet.LabelAlphabet;
import org.fnlp.ml.types.sv.HashSparseVector;
import org.fnlp.nlp.cn.ChineseTrans;
import gnu.trove.iterator.TIntFloatIterator;
import gnu.trove.map.hash.TIntFloatHashMap;
class TrainInstance implements Serializable {
private static final long serialVersionUID = 1467092492463327579L;
private String key;
private HashSparseVector vector;
public TrainInstance(String key, HashSparseVector vector) {
this.key = key;
this.vector = vector;
}
/**
* @return the key
*/
public String getKey() {
return key;
}
/**
* @param key the key to set
*/
public void setKey(String key) {
this.key = key;
}
/**
* @return the vector
*/
public HashSparseVector getVector() {
return vector;
}
/**
* @param vector the vector to set
*/
public void setVector(HashSparseVector vector) {
this.vector = vector;
}
}
public class KMeansWordCluster implements Serializable {
private static final long serialVersionUID = 1467092492463327579L;
private LabelAlphabet alphabet = new LabelAlphabet();
private HashMap<String, ArrayList<HashSparseVector>> trainData = new HashMap<String, ArrayList<HashSparseVector>>();
private ArrayList<int[]> template = new ArrayList<int[]>();
private int longestTemplate;
private HashMap<Integer, ArrayList<String>> classOri = new HashMap<Integer, ArrayList<String>>();
private HashMap<String, ArrayList<Integer>> classPerString = new HashMap<String, ArrayList<Integer>>();
private ArrayList<HashSparseVector> classCenter = new ArrayList<HashSparseVector>();
private ArrayList<Integer> classCount = new ArrayList<Integer>();
private ArrayList<Float> baseDistList = new ArrayList<Float>();
private String trainPath;
public KMeansWordCluster(String templatePath, String dataPath,
String classPath) {
this.trainPath = dataPath;
try {
readTemplete(templatePath);
readClass(classPath);
initCluster();
} catch (IOException e) {
e.printStackTrace();
}
}
public KMeansWordCluster(String alphabetPath, String classCenterPath, String templatePath, String classPath) throws Exception {
readTemplete(templatePath);
readClass(classPath);
LabelAlphabet alphabetRead = (LabelAlphabet)loadObject(alphabetPath);
@SuppressWarnings("unchecked")
ArrayList<HashSparseVector> classCenterRead = (ArrayList<HashSparseVector>)loadObject(classCenterPath);
setAlphabet(alphabetRead);
setClassCenter(classCenterRead);
addClassCount();
initBaseDist();
}
/**
* @return the alphabet
*/
public LabelAlphabet getAlphabet() {
return alphabet;
}
/**
* @param alphabet the alphabet to set
*/
public void setAlphabet(LabelAlphabet alphabet) {
this.alphabet = alphabet;
}
/**
* @return the classCenter
*/
public ArrayList<HashSparseVector> getClassCenter() {
return classCenter;
}
/**
* @param classCenter the classCenter to set
*/
public void setClassCenter(ArrayList<HashSparseVector> classCenter) {
this.classCenter = classCenter;
}
private void readClass(String path) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(path), "UTF-8"));
String s;
int n = 0;
while ((s = br.readLine()) != null) {
String[] allc = s.split("\\s+");
add2Class(allc, n);
n++;
}
br.close();
System.out.println("Finish load class!");
}
private void add2Class(String[] allc, int n) {
for (String s : allc) {
add2ClassOri(n, s);
add2ClassPerString(s, n);
}
}
void readData(String path) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(path), "UTF-8"));
String s;
int n = 0;
while ((s = br.readLine()) != null) {
genFeatures(s);
printTerminal(n, 10000, "raad");
n++;
}
br.close();
System.out.println("Finish load training data!");
}
private ArrayList<TrainInstance> genFeatures(String s) {
ArrayList<TrainInstance> trainInstancelist = new ArrayList<TrainInstance>();
String[] seq = string2StringSeq(s);
for (int i = longestTemplate; i < longestTemplate + s.length(); i++) {
String currentString = seq[i];
int[] feaId = new int[template.size()];
for (int j = 0; j < template.size(); j++) {
int[] fea = template.get(j);
String eleFea = j + ":" + perFea(i, seq, fea);
int id = alphabet.lookupIndex(eleFea);
feaId[j] = id;
}
HashSparseVector hsvector = new HashSparseVector();
hsvector.put(feaId, 1.0f);
trainInstancelist.add(new TrainInstance(currentString, hsvector));
}
return trainInstancelist;
}
protected void add2Data(String str, HashSparseVector hsvector) {
if (trainData.containsKey(str)) {
ArrayList<HashSparseVector> list = trainData.get(str);
list.add(hsvector);
} else {
ArrayList<HashSparseVector> list = new ArrayList<HashSparseVector>();
list.add(hsvector);
trainData.put(str, list);
}
}
private void add2ClassOri(int id, String chac) {
if (classOri.containsKey(id)) {
ArrayList<String> list = classOri.get(id);
list.add(chac);
} else {
ArrayList<String> list = new ArrayList<String>();
list.add(chac);
classOri.put(id, list);
}
}
private void add2ClassPerString(String chac, int id) {
if (classPerString.containsKey(chac)) {
ArrayList<Integer> list = classPerString.get(chac);
list.add(id);
} else {
ArrayList<Integer> list = new ArrayList<Integer>();
list.add(id);
classPerString.put(chac, list);
}
}
private String perFea(int seqId, String[] seq, int[] fea) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < fea.length; i++) {
int id = fea[i];
sb.append(seq[seqId + id]);
}
return sb.toString();
}
String perFea(int seqId, String s, int[] fea) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < fea.length; i++) {
int id = fea[i];
sb.append(s.charAt(seqId + id));
}
return sb.toString();
}
private String[] string2StringSeq(String s) {
int length = longestTemplate * 2 + s.length();
String[] seq = new String[length];
for (int i = 0; i < longestTemplate; i++) {
seq[i] = "Begin" + i;
seq[length-i-1] = "End" + i;
}
for (int i = 0; i < s.length(); i++)
seq[i+longestTemplate] = String.valueOf(s.charAt(i));
return seq;
}
private void readTemplete(String path) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(path), "UTF-8"));
String s;
while ((s = br.readLine()) != null) {
String[] str = s.split(",");
int[] fea = new int[str.length];
for (int i = 0; i < fea.length; i++) {
int id = 0;
try {
id = Integer.parseInt(str[i]);
} catch (Exception e) {
e.printStackTrace();
}
fea[i] = id;
}
template.add(fea);
}
setLongestTemplate();
br.close();
System.out.println("Finish load template!");
}
private void setLongestTemplate() {
int n = 0;
for (int[] fea : template) {
for (int i : fea) {
if (Math.abs(i) > n)
n = Math.abs(i);
}
}
longestTemplate = n;
}
private void initCluster() throws IOException {
initVector();
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(trainPath), "UTF-8"));
String s;
int n = 0;
while ((s = br.readLine()) != null) {
ArrayList<TrainInstance> trainData = genFeatures(s);
initAddInstanceList(trainData);
printTerminal(n, 10000, "init line");
n++;
}
br.close();
normalClassCenter();
initBaseDist();
}
private void initVector() {
for (int i = 0; i < classOri.size(); i++) {
HashSparseVector hsvector = new HashSparseVector();
classCenter.add(hsvector);
classCount.add(0);
}
System.out.println("All cluster centers have been created!");
}
private void addClassCount() {
for (int i = 0; i < classOri.size(); i++)
classCount.add(1);
}
private void initAddInstanceList(ArrayList<TrainInstance> trainData) {
for (TrainInstance ele : trainData) {
initAddInstance(ele);
}
}
private void initAddInstance(TrainInstance instance) {
String key = instance.getKey();
HashSparseVector vector = instance.getVector();
ArrayList<Integer> classNum = classPerString.get(key);
if (classNum == null)
return;
for (int n : classNum) {
int count = classCount.get(n);
classCount.set(n, count+1);
HashSparseVector vectorcenter = classCenter.get(n);
vectorcenter.plus(vector);
}
}
private void normalClassCenter() {
for (int i = 0; i < classOri.size(); i++) {
HashSparseVector vector = classCenter.get(i);
int count = classCount.get(i);
vector.scaleDivide(count);
classCount.set(i, 1);
}
}
protected void initPerClassCenter(int classNum) {
ArrayList<String> stringlist = classOri.get(classNum);
HashSparseVector hsvector = new HashSparseVector();
int divide = 0;
for (String s : stringlist) {
ArrayList<HashSparseVector> vectorlist = trainData.get(s);
if (vectorlist == null)
continue;
divide += vectorlist.size();
for (HashSparseVector vector : vectorlist)
hsvector.plus(vector);
}
hsvector.scaleDivide((float) divide);
classCenter.add(hsvector);
classCount.add(1);
}
public void cluster() throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(
new FileInputStream(trainPath), "UTF-8"));
String s;
int n = 0;
while ((s = br.readLine()) != null) {
ArrayList<TrainInstance> trainData = genFeatures(s);
clusterList(trainData);
printTerminal(n, 10000, "cluster line");
if ((n+1) % 10000 == 0)
saveObject("tmpdata/classCenterTemp", classCenter);
n++;
}
br.close();
updateAverageCenter();
}
private void updateAverageCenter() {
for (int i = 0; i < classCount.size(); i++) {
HashSparseVector center = classCenter.get(i);
int count = classCount.get(i);
center.scaleDivide((float) count);
}
}
private void clusterList(ArrayList<TrainInstance> trainData) {
for (TrainInstance ele : trainData) {
String key = ele.getKey();
HashSparseVector vector = ele.getVector();
if (!classPerString.containsKey(key))
continue;
int minid = minClass(key, vector);
updateCenter(minid, vector);
}
}
private int minClass(TrainInstance instance) {
return minClass(instance.getKey(), instance.getVector());
}
private int minClass(String key, HashSparseVector vector) {
float min = Float.MAX_VALUE;
int classid = 0;
ArrayList<Integer> classlist = classPerString.get(key);
if (classlist == null)
return -1;
for (Integer n : classlist) {
float base = baseDistList.get(n);
float distance = distanceEuclidean(n, vector, base);
if (distance < min) {
min = distance;
classid = n;
}
}
return classid;
}
private float distanceEuclidean(int n, HashSparseVector sv, float baseDistance) {
HashSparseVector center = classCenter.get(n);
int count = classCount.get(n);
float dist = baseDistance / (count * count);
TIntFloatHashMap data = center.data;
TIntFloatIterator it = sv.data.iterator();
while (it.hasNext()) {
it.advance();
int key = it.key();
if (!data.containsKey(key)) {
dist += it.value() * it.value();
}
else {
float temp = data.get(key) / count;
dist -= temp * temp;
dist += (it.value() - temp) * (it.value() - temp);
}
}
return dist;
}
float distanceEuclidean(HashSparseVector sv1 ,HashSparseVector sv2) {
float dist = 0.0f;
TIntFloatIterator it1 = sv1.data.iterator();
TIntFloatIterator it2 = sv2.data.iterator();
if (it1.hasNext() && it2.hasNext()) {
it1.advance();
it2.advance();
}
while (it1.hasNext() && it2.hasNext()) {
if(it1.key()<it2.key()){
dist += it1.value()*it1.value();
it1.advance();
}else if(it1.key()>it2.key()){
dist += it2.value()*it2.value();
it2.advance();
}else{
float t = it1.value() - it2.value();
dist += t*t;
it1.advance();
it2.advance();
}
}
while (it1.hasNext()) {
it1.advance();
dist += it1.value() * it1.value();
}
while (it2.hasNext()) {
it2.advance();
dist += it2.value() * it2.value();
}
return dist;
}
private void updateCenter(int classid, HashSparseVector vector) {
int count = classCount.get(classid);
classCount.set(classid, count+1);
HashSparseVector vectorcenter = classCenter.get(classid);
updateBaseDist(classid, vector);
vectorcenter.plus(vector);
// vectorcenter.scaleDivide((float)count / (float)(count+1));
}
private void updateBaseDist(int classid, HashSparseVector vector) {
float base = baseDistList.get(classid);
TIntFloatHashMap center = classCenter.get(classid).data;
TIntFloatIterator it = vector.data.iterator();
while (it.hasNext()) {
it.advance();
if (!center.containsKey(it.key())) {
base += it.value() * it.value();
}
else {
float temp = center.get(it.key());
base -= temp * temp;
base += (it.value() - temp) * (it.value() - temp);
}
}
baseDistList.set(classid, base);
}
private float getBaseDist(int classid) {
float base = 0.0f;
TIntFloatIterator it = classCenter.get(classid).data.iterator();
while (it.hasNext()) {
it.advance();
base += it.value() * it.value();
}
return base;
}
private void initBaseDist() {
for (int i = 0; i < classCenter.size(); i++) {
float base = getBaseDist(i);
baseDistList.add(base);
}
System.out.println("Finish init base distance list");
}
protected Object loadObject(String path) throws IOException, ClassNotFoundException {
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(
new GZIPInputStream(new FileInputStream(path))));
Object obj = in.readObject();
in.close();
return obj;
}
protected void saveObject(String path, Object obj) throws IOException {
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(new GZIPOutputStream(new FileOutputStream(path))));
out.writeObject(obj);
out.close();
}
private void printTerminal(int n, int divide, String s) {
if ((n + 1) % divide == 0)
System.out.println(s + " " + (n + 1));
}
public int classifier(String s) {
TrainInstance instance = genFeaForClassifier(s);
return minClass(instance);
}
private TrainInstance genFeaForClassifier(String s) {
int[] feaId = new int[template.size()];
String[] seqFea = string2StringSeqWithBE(s);
for (int i = 0; i < template.size(); i++) {
int[] fea = template.get(i);
String eleFea = i + ":" + perFea(1, seqFea, fea);
int id = alphabet.lookupIndex(eleFea);
feaId[i] = id;
}
HashSparseVector hsvector = new HashSparseVector();
hsvector.put(feaId, 1.0f);
return new TrainInstance(seqFea[1], hsvector);
}
private String[] string2StringSeqWithBE(String s) {
String[] seq = new String[3];
if (s.startsWith("Begin0")) {
seq[0] = "Begin0";
seq[1] = String.valueOf(s.charAt(6));
seq[2] = String.valueOf(s.charAt(7));
}
else if (s.endsWith("End0")) {
seq[0] = String.valueOf(s.charAt(0));
seq[1] = String.valueOf(s.charAt(1));
seq[2] = "End0";
}
else
for (int i = 0; i < s.length(); i++)
seq[i] = String.valueOf(s.charAt(i));
return seq;
}
public static void main(String[] args) throws Exception {
if (args.length == 5) {
KMeansWordCluster kmwc = new KMeansWordCluster(args[0], args[1], args[2]);
kmwc.saveObject(args[4], kmwc.getAlphabet());
kmwc.cluster();
kmwc.saveObject(args[3], kmwc.getClassCenter());
}
if (args.length == 4) {
KMeansWordCluster kmwc = new KMeansWordCluster(args[0], args[1], args[2], args[3]);
System.out.println(kmwc.classifier("123"));
System.out.println(kmwc.classifier("sdf"));
System.out.println(kmwc.classifier("gjl"));
System.out.println(kmwc.classifier("打日本"));
System.out.println(kmwc.classifier("中日韩"));
System.out.println(kmwc.classifier("几日呢"));
System.out.println(kmwc.classifier("Begin0几日"));
System.out.println(kmwc.classifier("几日End0"));
}
if(args.length==0){
KMeansWordCluster kmwc = new KMeansWordCluster(
"./exp/featureCluster/alphabet","./exp/featureCluster/clusterCenter",
"./exp/featureCluster/template","./exp/featureCluster/charsynset.txt");
// System.out.println(kmwc.classifier("新款intel处理器"));
System.out.println(kmwc.classifier("１２３"));
System.out.println(kmwc.classifier("123"));
System.out.println(kmwc.classifier("sdf"));
System.out.println(kmwc.classifier("ＡＢＢ"));
System.out.println(kmwc.classifier("gjl"));
System.out.println(kmwc.classifier("打日本"));
System.out.println(kmwc.classifier("中日韩"));
System.out.println(kmwc.classifier("几日呢"));
System.out.println(kmwc.classifier("Begin0几日"));
System.out.println(kmwc.classifier("几日End0"));
}
}
}