/*
 * Copyright 2017-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.mapping;

import org.onosproject.core.ApplicationId;
import org.onosproject.event.ListenerService;
import org.onosproject.mapping.MappingStore.Type;
import org.onosproject.net.DeviceId;

/**
 * Interface of mapping management service.
 */
public interface MappingService
        extends ListenerService<MappingEvent, MappingListener> {

    /**
     * Obtains the number of mappings in the system.
     *
     * @param type mapping store type
     * @return mapping count
     */
    int getMappingCount(Type type);

    /**
     * Stores a mapping entry.
     *
     * @param type  mapping store type
     * @param entry mapping entry to be stored
     */
    void storeMappingEntry(Type type, MappingEntry entry);

    /**
     * Obtains the collection of mapping entries applied on the specific device.
     * The will include mapping which may not yet have been applied to device.
     *
     * @param type     mapping store type
     * @param deviceId device identifier
     * @return collection of mapping entries
     */
    Iterable<MappingEntry> getMappingEntries(Type type, DeviceId deviceId);

    /**
     * Obtains the collection of mapping entries with a given application ID.
     *
     * @param type  mapping store type
     * @param appId application identifier
     * @return collection of mapping entries
     */
    Iterable<MappingEntry> getMappingEntriesByAddId(Type type, ApplicationId appId);

    /**
     * Removes the specified mapping entries from their respective devices and
     * mapping store.
     *
     * @param type     mapping store type
     * @param entries  one or more mapping entries
     */
    void removeMappingEntries(Type type, MappingEntry... entries);

    /**
     * Removes all mapping entries submitted by a particular application.
     *
     * @param type  mapping store type
     * @param appId identifier of application whose mapping entries will be removed
     */
    void removeMappingEntriesByAppId(Type type, ApplicationId appId);

    /**
     * Purges all mappings on the specified device and mapping store.
     * Note that the mappings will only be removed from storage, the mappings
     * are still remaining in the device.
     *
     * @param type     mapping store type
     * @param deviceId device identifier
     */
    void purgeMappings(Type type, DeviceId deviceId);
}