/*
 *
 * Copyright (c) 2006 The Apache Software Foundation
 *
 * 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.apache.qpid.client.security.amqplain;

import javax.security.sasl.SaslClientFactory;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import javax.security.sasl.Sasl;
import javax.security.auth.callback.CallbackHandler;
import java.util.Map;

public class AmqPlainSaslClientFactory implements SaslClientFactory
{
    public SaslClient createSaslClient(String[] mechanisms, String authorizationId, String protocol, String serverName, Map props, CallbackHandler cbh) throws SaslException
    {
        for (int i = 0; i < mechanisms.length; i++)
        {
            if (mechanisms[i].equals(AmqPlainSaslClient.MECHANISM))
            {
                if (cbh == null)
                {
                    throw new SaslException("CallbackHandler must not be null");
                }
                return new AmqPlainSaslClient(cbh);
            }
        }
        return null;
    }

    public String[] getMechanismNames(Map props)
    {
        if (props.containsKey(Sasl.POLICY_NOPLAINTEXT) ||
            props.containsKey(Sasl.POLICY_NODICTIONARY) ||
            props.containsKey(Sasl.POLICY_NOACTIVE))
        {
            // returned array must be non null according to interface documentation
            return new String[0];
        }
        else
        {
            return new String[]{AmqPlainSaslClient.MECHANISM};
        }
    }
}
