package org.appfuse.webapp.services.impl;
   
   import org.apache.tapestry5.ValueEncoder;
   import org.appfuse.model.Role;
   import org.appfuse.service.RoleManager;
   
   
   public class RoleEncoder implements ValueEncoder<Role> {
   
      private RoleManager roleManager;
  
      public RoleEncoder(RoleManager roleManager) {
          this.roleManager = roleManager;
      }
  
      public String toClient(Role value) {
          return String.valueOf(value.getId());
      }
  
      public Role toValue(String clientValue) {
          // happens when testing with iBatis for some reason
          if ("null".equals(clientValue)) {
              return null;
          }
  
          Long id = Long.valueOf(clientValue);
          return roleManager.get(id);
      }
  
  }