package models;

 import java.util.*;

 import javax.persistence.*;

 import play.db.jpa.*;

 import play.data.validation.*;

 @Entity

 public class Tag extends Model implements Comparable<Tag> {

     @Required

     public String name;

     private Tag(String name) {

         this.name = name;

     }

     public static Tag findOrCreateByName(String name) {

         Tag tag = Tag.find("byName", name).first();

         if(tag == null) {

             tag = new Tag(name);

         }

         return tag;

     }

     public static List<Map> getCloud() {

         List<Map> result = Tag.find(

             "select new map(t.name as tag, count(p.id) as pound) from Post p join p.tags as t group by t.name"

         ).fetch();

         return result;

     }

     public String toString() {

         return name;

     }

     public int compareTo(Tag otherTag) {

         return name.compareTo(otherTag.name);

     }

 }