/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */
package org.geotools.graph.io.standard;

import java.util.HashMap;

import org.geotools.graph.io.GraphReaderWriter;

/**
 * An abstract implementation of the GraphReaderWriter interface.
 * 
 * @author Justin Deoliveira, Refractions Research Inc, jdeolive@refractions.net
 *
 * @source $URL$
 */
public abstract class AbstractReaderWriter implements GraphReaderWriter {
  private HashMap m_properties;
  
  /** GraphGenerator property key **/
  public static final String GENERATOR = "GENERATOR";
  
  /** GraphBuilder property key **/
  public static final String BUILDER = "BUILDER";
  
  /** Node write / read flag **/
  public static final String NODES = "NODES";
  
  /** Edge write / read flag **/
  public static final String EDGES = "EDGES";
  
  /**
   * Constructs an AbstractReaderWriter.
   */
  public AbstractReaderWriter() {
    m_properties = new HashMap();  
  }
  
  /**
   * Sets a property. Some properties dont have values associated with them, 
   * they are just set, and unset.
   * 
   * @param name Name of property
   */
  public void setProperty(String name) {
    setProperty(name, new Object());  
  }
  
  /**
   * @see GraphReaderWriter#setProperty(String, Object)
   */
  public void setProperty(String name, Object obj) {
    m_properties.put(name, obj);    
  }

  /**
   * @see GraphReaderWriter#getProperty(String)
   */
  public Object getProperty(String name) {
    return(m_properties.get(name));
  } 
}