/*
 * Copyright  1999-2004 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.savan.util;

import org.apache.savan.SavanConstants;
import org.apache.savan.SavanException;
import org.apache.savan.SavanMessageContext;
import org.apache.savan.configuration.ConfigurationManager;
import org.apache.savan.configuration.MappingRules;
import org.apache.savan.configuration.Protocol;

import java.util.HashMap;
import java.util.Iterator;

/** Utility class to extract the Protocol type from a MessageContext */
public class ProtocolManager {

    public static Protocol getMessageProtocol(SavanMessageContext smc) throws SavanException {
        //TODO to this depending on Protocol rules. //TODO make this algorithm efficient

        ConfigurationManager configurationManager = (ConfigurationManager)smc
                .getConfigurationContext().getProperty(SavanConstants.CONFIGURATION_MANAGER);
        if (configurationManager == null)
            throw new SavanException("Cant find the Configuration Manager");

        String action = smc.getMessageContext().getOptions().getAction();
        if (action != null) {
            HashMap map = configurationManager.getProtocolMap();
            Iterator iter = map.values().iterator();
            while (iter.hasNext()) {
                Protocol protocol = (Protocol)iter.next();
                MappingRules mappingRules = protocol.getMappingRules();
                if (mappingRules.ruleMatched(MappingRules.MAPPING_TYPE_ACTION, action)) {
                    return protocol;
                }
            }
        }

        return null;
    }

}