source: src/main/java/agents/anac/y2013/MetaAgent/parser/reg/RegParser.java

package agents.anac.y2013.MetaAgent.parser.reg;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import agents.anac.y2013.MetaAgent.Parser.Type;

public class RegParser {

        private Type _type;
        private HashMap<String,Double> values;
        
        public RegParser(String fileName, Type type) {
                values=new HashMap<String,Double>();
                this._type=type;
                String [] lines=readFile(fileName);
                for (int i = 0; i < lines.length; i++) {
                        parseLine(lines[i]);
                }
        }

        private void parseLine(String line) {
                String keys[]=line.split(",");
                keys[0]=keys[0].replace("\"","");
                for (int i = 0; i < keys.length; i++) {
                        values.put(keys[0],Double.parseDouble(keys[1]));
                }
        }
        public double calcReg(HashMap<String,Double>map){
                double ans=0;
                for (String modifier : values.keySet()) {
                        double value=values.get(modifier);
                        if(modifier.compareTo("(Intercept)")==0){
                                ans+=value;;
                                continue;
                        }
                        double temp=value*map.get(modifier);
                        ans+=temp;
                }
                switch(this._type){
                case LINREG:
                        return ans;
                        
                case LOGREG:
                        return calcLog(ans);
                default:
                        return -1;
                }
                
        }
        private double calcLog(double ans) {
                double res=-1*ans;
                res=Math.exp(res);
                res+=1;
                return 1/res;
        }

        private String[] readFile(String fileName) {
                String text="";
                try {
                        BufferedReader br = new BufferedReader(new FileReader(fileName));
                        StringBuilder sb = new StringBuilder();
                        String line = br.readLine();
                        while (line != null) {
                            sb.append(line);
                            sb.append("\n");
                            line = br.readLine();
                        }
                         text= sb.toString();
                        br.close();
                    }catch(Exception e){
                        e.printStackTrace();
                    }
                return text.split("\n");
        }
        
}