/**
 * Copyright 2015 Palantir Technologies, Inc.
 *
 * 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.palantir.giraffe.host;

import java.io.IOException;

/**
 * Systems that implement this interface can be upgraded into
 * {@link HostControlSystem} instances.
 *
 * @author bkeyes
 */
public interface HostControlSystemUpgradeable {

    /**
     * Returns a {@link HostControlSystem} view of the resources accessible with
     * this system.
     * <p>
     * The returned view is always open and calling {@code close()} has no
     * effect. Closing the source system closes all views.
     *
     * @throws IOException if an I/O error occurs while creating the new system
     */
    HostControlSystem asHostControlSystem() throws IOException;

}