/*
 * Copyright 2016-present Open Networking Laboratory
 *
 * 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.onosproject.incubator.net.virtual.provider;

import static com.google.common.base.Preconditions.checkState;

public abstract class AbstractVirtualProviderService<P extends VirtualProvider>
        implements VirtualProviderService {

    private boolean isValid = true;
    private final P provider;

    protected AbstractVirtualProviderService(P provider) {
        this.provider = provider;
    }

    /**
     * Invalidates this provider service.
     */
    public void invalidate() {
        isValid = false;
    }

    /**
     * Checks the validity of this provider service.
     *
     * @throws java.lang.IllegalStateException if the service is no longer valid
     */
    public void checkValidity() {
        checkState(isValid, "Provider service is no longer valid");
    }

    @Override
    public P provider() {
        return provider;
    }
}