content: /*******************************************************************************
   * Copyright (c) 2013 aegif.
   *
   * This file is part of NemakiWare.
   *
   * NemakiWare 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.
   *
   * NemakiWare 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 NemakiWare.
   * If not, see <http://www.gnu.org/licenses/>.
   *
   * Contributors:
   *     linzhixing(https://github.com/linzhixing) - initial API and implementation
   ******************************************************************************/
  package jp.aegif.nemaki.util;
  
  import java.util.List;
  
  public interface PropertyManager {
  	/**
  	 * Read a value of the property as a single string
  	 * @param key
  	 * @return
  	 * @throws Exception
  	 */
  	public String readValue(String key);
  
  	/**
  	 *
  	 * @param key
  	 * @return
  	 */
  	public List<String>readValues(String key);
  
  	/**
  	 * Modify a value of the property
  	 * @param key
  	 * @param value: new value
  	 * @throws Exception
  	 */
  	public void modifyValue(String key, String value);
  
  	/**
  	 * Add a value to the property which might have multiple values, separated with comma
  	 * @param key
  	 * @param value
  	 * @throws Exception
  	 */
  	public void addValue(String key, String value);
  
  	/**
  	 * Remove a value from the property which might have multiple values, separated with comma
  	 * @param key
  	 * @param value
  	 * @throws Exception
  	 */
  	public void removeValue(String key, String value);
  
  
  	/**
  	 *
  	 * @param key
  	 * @return
  	 */
  	public String readHeadValue(String key);
  }
  