/*
    * 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.model.types;
  
  import java.lang.reflect.ParameterizedType;
  
  /**
   * @author Christian Bauer
   */
  public abstract class AbstractDatatype<V> implements Datatype<V> {
  
      private Builtin builtin;
  
      protected Class<V> getValueType() {
          return (Class<V>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
      }
  
      @Override
      public boolean isHandlingJavaType(Class type) {
          return getValueType().isAssignableFrom(type);
      }
  
      @Override
      public V valueOf(String s) throws InvalidValueException {
          return null;
      }
  
      public Builtin getBuiltin() {
          return builtin;
      }
  
      public void setBuiltin(Builtin builtin) {
          this.builtin = builtin;
      }
  
      public String getString(V value) throws InvalidValueException {
          if (value == null) return "";
          if (!isValid(value)) {
              throw new InvalidValueException("Value is not valid: " + value);
          }
          return value.toString();
      }
  
      public boolean isValid(V value) {
          return value == null || getValueType().isAssignableFrom(value.getClass());
      }
  
      @Override
      public String toString() {
          return "(" + getClass().getSimpleName() + ")";
      }
  
      public String getDisplayString() {
          if (this instanceof CustomDatatype) {
              return ((CustomDatatype)this).getName();
          } else if (getBuiltin() != null) {
              return getBuiltin().getDescriptorName();
          } else {
              return getValueType().getSimpleName();
          }
      }
  
  }