/*
    * Copyright 2005,2009 Ivan SZKIBA
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.ini4j.spi;
  
  import org.ini4j.Config;
  import org.ini4j.Options;
  
  public class OptionsBuilder implements OptionsHandler
  {
      private boolean _header;
      private String _lastComment;
      private Options _options;
  
      public static OptionsBuilder newInstance(Options opts)
      {
          OptionsBuilder instance = newInstance();
  
          instance.setOptions(opts);
  
          return instance;
      }
  
      public void setOptions(Options value)
      {
          _options = value;
      }
  
      @Override public void endOptions()
      {
  
          // comment only .opt file ...
          if ((_lastComment != null) && _header)
          {
              setHeaderComment();
          }
      }
  
      @Override public void handleComment(String comment)
      {
          if ((_lastComment != null) && _header)
          {
              setHeaderComment();
              _header = false;
          }
  
          _lastComment = comment;
      }
  
      @Override public void handleOption(String name, String value)
      {
          if (getConfig().isMultiOption())
          {
              _options.add(name, value);
          }
          else
          {
              _options.put(name, value);
          }
  
          if (_lastComment != null)
          {
              if (_header)
              {
                  setHeaderComment();
              }
              else
              {
                  putComment(name);
              }
  
              _lastComment = null;
          }
  
          _header = false;
      }
  
      @Override public void startOptions()
      {
          if (getConfig().isHeaderComment())
          {
              _header = true;
          }
      }
  
      protected static OptionsBuilder newInstance()
      {
         return ServiceFinder.findService(OptionsBuilder.class);
     }
 
     private Config getConfig()
     {
         return _options.getConfig();
     }
 
     private void setHeaderComment()
     {
         if (getConfig().isComment())
         {
             _options.setComment(_lastComment);
         }
     }
 
     private void putComment(String key)
     {
         if (getConfig().isComment())
         {
             _options.putComment(key, _lastComment);
         }
     }
 }