content: /*
   * Copyright (c) 2016 the original author or authors.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  
  package com.rivescript.session;
  
  
  import java.util.Collections;
  import java.util.Map;
  
  /**
   * A no operation {@link SessionManager} suitable for disabling session storage.
   *
   * @author Noah Petherbridge
   * @author Marcel Overdijk
   */
  public class NoOpSessionManager implements SessionManager {
  
  	@Override
  	public UserData init(String username) {
  		return noOpSession();
  	}
  
  	@Override
  	public void set(String username, String name, String value) {
  	}
  
  	@Override
  	public void set(String username, Map<String, String> vars) {
  	}
  
  	@Override
  	public void addHistory(String username, String input, String reply) {
  	}
  
  	@Override
  	public void setLastMatch(String username, String trigger) {
  	}
  
  	@Override
  	public String get(String username, String name) {
  		return null;
  	}
  
  	@Override
  	public UserData get(String username) {
  		return null;
  	}
  
  	@Override
  	public Map<String, UserData> getAll() {
  		return Collections.emptyMap();
  	}
  
  	@Override
  	public String getLastMatch(String username) {
  		return null;
  	}
  
  	@Override
  	public History getHistory(String username) {
  		return new History();
  	}
  
  	@Override
  	public void clear(String username) {
  	}
  
  	@Override
  	public void clearAll() {
  	}
  
  	@Override
  	public void freeze(String username) {
  	}
  
  	@Override
  	public void thaw(String username, ThawAction action) {
  	}
  
  	private UserData noOpSession() {
  		UserData userData = new UserData();
  		userData.setLastMatch("");
  		return userData;
  	}
  }
  