/*

   Derby - Class org.apache.derby.impl.jdbc.authentication.JNDIAuthenticationService

   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to you 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.apache.derby.impl.jdbc.authentication;

import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.services.property.PropertyUtil;

import org.apache.derby.iapi.jdbc.AuthenticationService;
import org.apache.derby.authentication.UserAuthenticator;

import org.apache.derby.iapi.util.StringUtil;

import java.util.Properties;

/**
 * This is the JNDI Authentication Service base class.
 * 

 * It instantiates the JNDI authentication scheme defined by the user/
 * administrator. Derby supports LDAP JNDI providers.
 * 

 * The user can configure its own JNDI provider by setting the
 * system or database property derby.authentication.provider .
 *
 */

public class JNDIAuthenticationService
	extends AuthenticationServiceBase {

	private String authenticationProvider;

	//
	// constructor
	//

	// call the super
	public JNDIAuthenticationService() {
		super();
	}

	//
	// ModuleControl implementation (overriden)
	//

	/**
	 *  Check if we should activate the JNDI authentication service.
	 */
	public boolean canSupport(Properties properties) {

		if (!requireAuthentication(properties))
			return false;

		//
		// we check 2 things:
		//
		// - if derby.connection.requireAuthentication system
		//   property is set to true.
		// - if derby.authentication.provider is set to one
		// of the JNDI scheme we support (i.e. LDAP).
		//

		authenticationProvider = PropertyUtil.getPropertyFromSet(
					properties,
						org.apache.derby.iapi.reference.Property.AUTHENTICATION_PROVIDER_PARAMETER);

		 if ( (authenticationProvider != null) &&
			   (StringUtil.SQLEqualsIgnoreCase(authenticationProvider,
				  	org.apache.derby.iapi.reference.Property.AUTHENTICATION_PROVIDER_LDAP)))
			return true;

		return false;
	}

	/**
	 * @see org.apache.derby.iapi.services.monitor.ModuleControl#boot
	 * @exception StandardException upon failure to load/boot the expected
	 * authentication service.
	 */
	public void boot(boolean create, Properties properties)
	  throws StandardException {

		// We need authentication
		// setAuthentication(true);

		// we call the super in case there is anything to get initialized.
		super.boot(create, properties);

		// We must retrieve and load the authentication scheme that we were
		// told to.

		// Set ourselves as being ready and loading the proper
		// authentication scheme for this service
		UserAuthenticator aJNDIAuthscheme;

		// we're dealing with LDAP
		aJNDIAuthscheme = new LDAPAuthenticationSchemeImpl(this, properties);	
		this.setAuthenticationService(aJNDIAuthscheme);
	}
}