/*
    * Copyright 2002-2012 the original author or authors.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *      http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package org.springframework.tests.context;
  
  import java.io.Serializable;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map;
  
  import org.springframework.beans.factory.ObjectFactory;
  import org.springframework.beans.factory.config.Scope;
  
  /**
   * @author Juergen Hoeller
   */
  @SuppressWarnings("serial")
  public class SimpleMapScope implements Scope, Serializable {
  
  	private final Map<String, Object> map = new HashMap<String, Object>();
  
  	private final List<Runnable> callbacks = new LinkedList<Runnable>();
  
  
  	public SimpleMapScope() {
  	}
  
  	public final Map<String, Object> getMap() {
  		return this.map;
  	}
  
  
  	@Override
  	public Object get(String name, ObjectFactory<?> objectFactory) {
  		synchronized (this.map) {
  			Object scopedObject = this.map.get(name);
  			if (scopedObject == null) {
  				scopedObject = objectFactory.getObject();
  				this.map.put(name, scopedObject);
  			}
  			return scopedObject;
  		}
  	}
  
  	@Override
  	public Object remove(String name) {
  		synchronized (this.map) {
  			return this.map.remove(name);
  		}
  	}
  
  	@Override
  	public void registerDestructionCallback(String name, Runnable callback) {
  		this.callbacks.add(callback);
  	}
  
  	@Override
  	public Object resolveContextualObject(String key) {
  		return null;
  	}
  
  	public void close() {
  		for (Iterator<Runnable> it = this.callbacks.iterator(); it.hasNext();) {
  			Runnable runnable = it.next();
  			runnable.run();
  		}
  	}
  
  	@Override
  	public String getConversationId() {
  		return null;
  	}
  
  }