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/*
 * Copyright (C) 2012 eXo Platform SAS.
 *
 * This 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; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.crsh.util;

import javax.servlet.ServletContext;
import java.util.Enumeration;
import java.util.Iterator;

public class ServletContextMap extends SimpleMap {

  /** . */
  private final ServletContext context;

  public ServletContextMap(ServletContext context) {
    this.context = context;
  }

  @Override
  protected Iterator keys() {
    return new Iterator() {
      Enumeration e = context.getAttributeNames();
      public boolean hasNext() {
        return e.hasMoreElements();
      }
      public String next() {
        return e.nextElement();
      }
      public void remove() {
        throw new UnsupportedOperationException();
      }
    };
  }

  @Override
  public Object get(Object key) {
    if (key instanceof String) {
      return context.getAttribute((String)key);
    } else {
      return null;
    }
  }
}