source: src/main/java/agents/anac/y2015/group2/G2CSVLogger.java

package agents.anac.y2015.group2;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;

public class G2CSVLogger {
        
        FileWriter fileWriter = null;
        PrintWriter printWriter;
        String eol = System.getProperty("line.separator");
        
        ArrayList<ArrayList<Double>> Buffer = new ArrayList<ArrayList<Double>>();
        
        G2CSVLogger () {
                
                //Empty previous logs
                File dir = new File("./logs/model/");
                if(dir != null){
                        for(File file: dir.listFiles()) file.delete();
                }
                dir = new File("./logs/real/");
                if(dir != null){
                        for(File file: dir.listFiles()) file.delete();
                }
                
        }
        
        void init (int partyNumber, String name) {
                try {
                        fileWriter = new FileWriter("./logs/"+name+"/party"+partyNumber+".csv");
                        //printWriter = new PrintWriter(fileWriter);
                
                        for(ArrayList<Double> list: Buffer) {
                                for(double s:list){
                                        fileWriter.append(String.valueOf(s));
                                        fileWriter.append(','); 
                                }
                                fileWriter.append(eol); 
                        }
                        Buffer.clear();
                        fileWriter.flush();
                } catch (IOException e) {
                        System.out.println("Could not create log for party " + partyNumber);
                }
                
                
        }
        
        void log(ArrayList<Double> list) {
                if(fileWriter == null) {
                        Buffer.add(list);
                } else {
                        try {
                                for(double s:list){
                                        fileWriter.append(String.valueOf(s));
                                        fileWriter.append(','); 
                                }
                                fileWriter.append(eol);
                                fileWriter.flush();
                        }catch (IOException e) {
                                System.out.println("Could not add to log");
                        }
                }
        }
        void log(Double d) {
                if(fileWriter == null) {
                        ArrayList<Double> list = new ArrayList<Double>();
                        list.add(d);
                        Buffer.add(list);
                } else {
                        try {
                                
                                fileWriter.append(String.valueOf(d));
                                fileWriter.append(eol);
                                fileWriter.flush();
                        }catch (IOException e) {
                                System.out.println("Could not add to log");
                        }
                }
        }
        
        boolean isInitialized() {
                return fileWriter != null;
        }
        void close(){
                try {
                        fileWriter.close();
                }catch (IOException e) {
                        System.out.println("Could not close file");
                }
        }
}