/**********************************************
    * Copyright (C) 2011 Lukas Laag
    * This file is part of svgreal.
    * 
    * svgreal is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * 
   * svgreal 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.  See the
   * GNU General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with svgreal.  If not, see http://www.gnu.org/licenses/
   **********************************************/
  package org.vectomatic.svg.edit.client.model;
  
  import org.vectomatic.dom.svg.impl.SVGElement;
  import org.vectomatic.svg.edit.client.command.IFactoryInstantiator;
  
  /**
   * Metadata class based on DOM attributes
   * @author laaglu
   */
  public class AttrMetadata extends MetadataBase<String, SVGElement> {
  	protected String attrName;
  	public AttrMetadata(String propertyName, String description, IFieldFactory fieldFactory, String attrName, IFactoryInstantiator<?> factory, IValidator<String, SVGElement> validator) {
  		super(propertyName, description, fieldFactory, factory, validator);
  		this.attrName = attrName;
  	}
  
  	@Override
  	public String get(SVGElement element) {
  		return element.getAttribute(attrName);
  	}
  
  	@Override
  	public String set(SVGElement element, String value) {
  		String oldValue = element.getAttribute(attrName);
  		element.setAttribute(attrName, value);
  		return oldValue;
  	}
  
  	@Override
  	public String remove(SVGElement element) {
  		String oldValue = element.getAttribute(attrName);
  		element.removeAttribute(attrName);
  		return oldValue;
  	}
  
  	@Override
  	public String toString() {
  		StringBuilder builder = new StringBuilder("AttrMetadata(");
  		builder.append(propertyName);
  		builder.append(", ");
  		builder.append(attrName);
  		builder.append(")");
  		return builder.toString();
  	}
  }