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/**
 * Copyright Microsoft Corporation
 * 
 * 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 com.microsoft.windowsazure.serviceruntime;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * 
 */
class RuntimeVersionManager {
    private final RuntimeVersionProtocolClient protocolClient;
    private final List supportedVersionList;

    RuntimeVersionManager(RuntimeVersionProtocolClient protocolClient) {
        this.protocolClient = protocolClient;

        this.supportedVersionList = new ArrayList(1);

        this.supportedVersionList.add(new RuntimeClientFactory() {
            public String getVersion() {
                return "2011-03-08";
            }

            public RuntimeClient createRuntimeClient(String path) {
                RuntimeKernel kernel = RuntimeKernel.getKernel();

                return new Protocol1RuntimeClient(kernel.getProtocol1RuntimeGoalStateClient(), kernel
                        .getProtocol1RuntimeCurrentStateClient(), path);
            }
        });
    }

    public RuntimeClient getRuntimeClient(String versionEndpoint) {
        Map versionMap = protocolClient.getVersionMap(versionEndpoint);

        for (RuntimeClientFactory factory : supportedVersionList) {
            if (versionMap.containsKey(factory.getVersion())) {
                return factory.createRuntimeClient(versionMap.get(factory.getVersion()));
            }
        }

        throw new RuntimeException("Server does not support any known protocol versions.");
    }
}