com.github.rahulsom.grooves.api.snapshots.Join Maven / Gradle / Ivy

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package com.github.rahulsom.grooves.api.snapshots;

import com.github.rahulsom.grooves.api.AggregateType;
import com.github.rahulsom.grooves.api.events.BaseEvent;

/**
 * A special kind of {@link Snapshot} that stores information about joined entities.
 *
 * @param          The Aggregate this join represents
 * @param             The type for the join's {@link #getId()} field
 * @param  The type for the other aggregate that {@link AggregateT} joins to
 * @param            The type for the {@link EventT}'s id field
 * @param              The base type for events that apply to {@link AggregateT}
 *
 * @author Rahul Somasunderam
 */
public interface Join<
        AggregateT extends AggregateType, JoinIdT, JoinedAggregateIdT, EventIdT,
        EventT extends BaseEvent>
        extends
        TemporalJoin,
        VersionedJoin,
        Snapshot {

    @Override
    default void setLastEvent(EventT aidBaseEvent) {
        this.setLastEventTimestamp(aidBaseEvent.getTimestamp());
        this.setLastEventPosition(aidBaseEvent.getPosition());
    }
}