/*
 *
 * 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.server.exchange;

import org.apache.log4j.Logger;
import org.apache.qpid.AMQException;

import java.util.HashMap;
import java.util.Map;

public class DefaultExchangeFactory implements ExchangeFactory
{
    private static final Logger _logger = Logger.getLogger(DefaultExchangeFactory.class);

    private Map<String, Class<? extends Exchange>> _exchangeClassMap = new HashMap<String, Class<? extends Exchange>>();

    public DefaultExchangeFactory()
    {
        _exchangeClassMap.put("direct", org.apache.qpid.server.exchange.DestNameExchange.class);
        _exchangeClassMap.put("topic", org.apache.qpid.server.exchange.DestWildExchange.class);
        _exchangeClassMap.put("headers", org.apache.qpid.server.exchange.HeadersExchange.class);
    }

    public Exchange createExchange(String exchange, String type, boolean durable, boolean autoDelete,
                                   int ticket)
            throws AMQException
    {
        Class<? extends Exchange> exchClass = _exchangeClassMap.get(type);
        if (exchClass == null)
        {
            throw new AMQException(_logger, "Unknown exchange type: " + type);
        }
        try
        {
            Exchange e = exchClass.newInstance();
            e.initialise(exchange, durable, ticket, autoDelete);
            return e;
        }
        catch (InstantiationException e)
        {
            throw new AMQException(_logger, "Unable to create exchange: " + e, e);
        }
        catch (IllegalAccessException e)
        {
            throw new AMQException(_logger, "Unable to create exchange: " + e, e);
        }
    }
}
