content: /*
  * Copyright (c) 1997 - 2016
  * Actelion Pharmaceuticals Ltd.
  * Gewerbestrasse 16
  * CH-4123 Allschwil, Switzerland
  *
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice, this
  *    list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. Neither the name of the the copyright holder nor the
  *    names of its contributors may be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  */
  
  package com.actelion.research.chem;
  
  import com.actelion.research.chem.reaction.ReactionArrow;
  
  public class DrawingObjectFactory
  {
  	private DrawingObjectFactory() {}
  
  	public static AbstractDrawingObject createObject(String descriptor) {
  		final String START = AbstractDrawingObject.DESCRIPTOR_START+AbstractDrawingObject.DESCRIPTOR_TYPE;
  	    if (!descriptor.startsWith(START)
  	     || !descriptor.endsWith(AbstractDrawingObject.DESCRIPTOR_END))
  	        return null;
  
  	    int index = descriptor.indexOf('\"', START.length());
  	    if (index == -1)
  	    	return null;
  
  	    final String type = descriptor.substring(START.length(), index);
  	    final String detail = descriptor.substring(START.length()+type.length()+1,
  				 								   descriptor.length()-AbstractDrawingObject.DESCRIPTOR_END.length());
  	    
  	    if (type.equals(ReactionArrow.TYPE_STRING))
  	        return new ReactionArrow(detail);
  	    if (type.equals(TextDrawingObject.TYPE_STRING))
  	        return new TextDrawingObject(detail);
  	
  	    return null;
  	    }
  	}
  