/*
 * Copyright 2017, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.spine3.server.stand;

import org.spine3.client.Subscription;
import org.spine3.client.SubscriptionId;
import org.spine3.client.Topic;
import org.spine3.type.TypeUrl;

import java.util.Set;

/**
 * Registry for subscription management.
 *
 * <p>Provides a quick access to the subscription records by {@link TypeUrl}.
 *
 * <p>Responsible for {@link Subscription} object instantiation.
 *
 * @author Alex Tymchenko
 */
interface SubscriptionRegistry {
    /**
     * Activate the subscription with the passed callback.
     *
     * <p>The callback passed will become associated with the subscription.
     *
     * @param subscription the subscription to activate
     * @param callback     the callback to make active
     */
    void activate(Subscription subscription, Stand.EntityUpdateCallback callback);

    /**
     * Creates a subscription for the passed {@link Topic} and adds it to the registry.
     *
     * @param topic the topic to subscribe to
     * @return the created subscription
     */
    Subscription add(Topic topic);

    /**
     * Remove the subscription from this registry.
     *
     * <p>If there is no such subscription in this instance of {@code SubscriptionRegistry},
     * invocation has no effect.
     *
     * @param subscription the subscription to remove
     */
    void remove(Subscription subscription);

    /**
     * Allows to determine if this registry has an item with the specified ID.
     *
     * @param subscriptionId the subscription ID to look for.
     * @return {@code true}, if this registry has a Subscription with the given ID,
     *         {@code false} otherwise.
     */
    boolean containsId(SubscriptionId subscriptionId);

    /**
     * Filter the registered {@link SubscriptionRecord}s by their type.
     *
     * @param type the type to filter by
     * @return the collection of filtered records
     */
    Set<SubscriptionRecord> byType(TypeUrl type);

    /**
     * Checks whether the current registry has the records related to a given type.
     *
     * @param type the type to check records for
     * @return {@code true} if there are records with the given type, {@code false} otherwise
     */
    boolean hasType(TypeUrl type);
}

@@ -2578,17 +2578,17 @@
 y has a 
-S
+s
 ubscript

Fix a typo in the Javadocs.