Formater.java

package com.thecoshman;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

class Formater {
    class Attribute{
        String name;
        Object value;
    }
    
    public String format(Attribute attr){
        return attr.name + ":" + formatValue(attr.value);
    }
    
    String formatValue(Object value){
        return value.toString();
    }
    
    String formatValue(String value){
        return value;
    }

    String formatValue(Integer value){
        return value.toString();
    }

    String formatValue(Boolean value){
        return value ? "true" : "false";
    }

    String formatValue(List<Object> value){
        String retrunValue = "< ";
        Iterator<Object> ittr = value.iterator();
        while(ittr.hasNext()){
            retrunValue += formatValue(ittr.next());
            if(ittr.hasNext()){
                retrunValue += " , ";
            }
        }
        retrunValue += " >";
        return retrunValue;
    }
    
    String formatValue(Map<String, Object> value){
        String retrunValue = "[ ";
        Iterator<String> ittr = value.keySet().iterator();
        while(ittr.hasNext()){
            String structMemberName = ittr.next();
            Object structMemberValue = value.get(structMemberName);
            retrunValue += structMemberName;
            retrunValue += ":";
            retrunValue += formatValue(structMemberValue);
            if(ittr.hasNext()){
                retrunValue += " , ";
            }
        }
        retrunValue += " ]";
        return retrunValue;
        
    }
}