/*
    * Copyright (C) 2013 4th Line GmbH, Switzerland
    *
    * The contents of this file are subject to the terms of either the GNU
    * Lesser General Public License Version 2 or later ("LGPL") or the
    * Common Development and Distribution License Version 1 or later
    * ("CDDL") (collectively, the "License"). You may not use this file
    * except in compliance with the License. See LICENSE.txt for more
    * information.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  package org.fourthline.cling.support.lastchange;
  
  import org.fourthline.cling.model.types.Datatype;
  import org.fourthline.cling.model.types.InvalidValueException;
  import org.fourthline.cling.support.shared.AbstractMap;
  
  import java.util.Map;
  
  public abstract class EventedValue<V> {
  
      final protected V value;
  
      public EventedValue(V value) {
          this.value = value;
      }
  
      public EventedValue(Map.Entry<String,String>[] attributes) {
          try {
              this.value = valueOf(attributes);
          } catch (InvalidValueException ex) {
              throw new RuntimeException(ex);
          }
      }
  
      public String getName() {
          return getClass().getSimpleName();
      }
  
      public V getValue() {
          return value;
      }
  
      public Map.Entry<String, String>[] getAttributes() {
          return new Map.Entry[] {
              new AbstractMap.SimpleEntry<>("val", toString())
          };
      }
  
      protected V valueOf(Map.Entry<String,String>[] attributes) throws InvalidValueException {
          V v = null;
          for (Map.Entry<String, String> attribute : attributes) {
              if (attribute.getKey().equals("val")) v = valueOf(attribute.getValue());
          }
          return v;
      }
  
      protected V valueOf(String s) throws InvalidValueException {
          return (V)getDatatype().valueOf(s);
      }
  
      @Override
      public String toString() {
          return getDatatype().getString(getValue());
      }
  
      abstract protected Datatype getDatatype();
  }