/*
 * Copyright (c) 2003, KNOPFLERFISH project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following
 * conditions are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 * - Neither the name of the KNOPFLERFISH project nor the names of its
 *   contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.knopflerfish.service.um.useradmin.impl;

import java.security.AccessController;
import java.util.Dictionary;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

import org.osgi.service.useradmin.UserAdminEvent;
import org.osgi.service.useradmin.UserAdminPermission;

/**
 * Dictionary for user admin properties. Security checks for put.
 *
 * @author  Gatespace AB
 * @version $Revision: 1.1.1.1 $
 */
public class UAProperties extends Dictionary {
  protected RoleImpl role;  
  protected Hashtable /* String -> byte[] or String */ ht = new Hashtable();

  public UAProperties(RoleImpl role) {
    this.role = role;
  }

  public Enumeration elements() {
    Vector v = new Vector();
    for (Enumeration en = ht.keys(); en.hasMoreElements();) {
      try {
	v.addElement(get(en.nextElement()));
      } catch (SecurityException e) {
	// Ignore elements we don't have access to.
      }
    }
    return v.elements();
  }

  public Object get(Object key) {
    // No security check for properties
    Object value = ht.get(key);
    if (value instanceof byte[] ) {
      return ((byte[])value).clone();
    }
    
    return value;
  }

  public boolean isEmpty() {
    return ht.isEmpty();
  } 

  public Enumeration keys() {
    return ht.keys();
  }

  public int size() {
    return ht.size();
  }

  public Object remove(Object key) {
    //synchronized (role) {
      if (key instanceof String) {
	if( UserAdminImpl.checkPermissions ) {
	  AccessController.checkPermission(
	    new UserAdminPermission((String)key, getChangeAction()));
	}
	Object res = ht.remove(key);
	role.uai.sendEvent( UserAdminEvent.ROLE_CHANGED, role );
	//role.um.save();
	return res;
      } else
	throw new IllegalArgumentException("The key must be a String, got " +
					   key.getClass());
      //}
  }

  public Object put(Object key, Object value) {
    //synchronized (role) {
      if (key instanceof String) {
	if( UserAdminImpl.checkPermissions ) {
	  AccessController.checkPermission(
	    new UserAdminPermission((String)key, getChangeAction()));
	}
	Object res;
	// value of type byte[] or String is ok
	if (value instanceof byte[]) {
	  res = ht.put(key, ((byte[])value).clone());
	}
	else if (value instanceof String ) {
	  res = ht.put( key, value );
	}
	else
	  throw new IllegalArgumentException("The value must be of type byte[]"
					     + " or String,  got "
					     + value.getClass());
	role.uai.sendEvent( UserAdminEvent.ROLE_CHANGED, role );
	//role.uai.save();
	
	return res;
      } else
	throw new IllegalArgumentException("The key must be a String, got " +
					   key.getClass());
      //}
  }

  
  public String toString() {
    //return ht.toString();
    return "#Properties#";
  }

  protected String getChangeAction() {
    return UserAdminPermission.CHANGE_PROPERTY;
  }

  protected Dictionary getUnderlyingDictionary() {
    return ht;
  }

  protected void setUnderlyingDictionary(Hashtable ht) {
    this.ht = ht;
  }

}