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/*******************************************************************************
* Copyright (c) 2010-2019, Tamas Szabo, Istvan Rath and Daniel Varro
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-v20.html.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package tools.refinery.viatra.runtime.rete.network.communication.timeless;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import tools.refinery.viatra.runtime.rete.network.Node;
import tools.refinery.viatra.runtime.rete.network.communication.CommunicationGroup;
import tools.refinery.viatra.runtime.rete.network.communication.CommunicationTracker;
import tools.refinery.viatra.runtime.rete.network.communication.MessageSelector;
import tools.refinery.viatra.runtime.rete.network.communication.PhasedSelector;
import tools.refinery.viatra.runtime.rete.network.mailbox.Mailbox;
/**
* A communication group containing only a single node with a single default
* mailbox.
*
* @author Tamas Szabo
* @since 1.6
*/
public class SingletonCommunicationGroup extends CommunicationGroup {
private Mailbox mailbox;
/**
* @since 1.7
*/
public SingletonCommunicationGroup(final CommunicationTracker tracker, final Node representative, final int identifier) {
super(tracker, representative, identifier);
}
@Override
public void deliverMessages() {
this.mailbox.deliverAll(PhasedSelector.DEFAULT);
}
@Override
public boolean isEmpty() {
return this.mailbox == null;
}
@Override
public void notifyHasMessage(final Mailbox mailbox, final MessageSelector kind) {
if (kind == PhasedSelector.DEFAULT) {
this.mailbox = mailbox;
if (!this.isEnqueued) {
this.tracker.activateUnenqueued(this);
}
} else {
throw new IllegalArgumentException(UNSUPPORTED_MESSAGE_KIND + kind);
}
}
@Override
public void notifyLostAllMessages(final Mailbox mailbox, final MessageSelector kind) {
if (kind == PhasedSelector.DEFAULT) {
this.mailbox = null;
this.tracker.deactivate(this);
} else {
throw new IllegalArgumentException(UNSUPPORTED_MESSAGE_KIND + kind);
}
}
@Override
public Map<MessageSelector, Collection<Mailbox>> getMailboxes() {
if (mailbox != null) {
return Collections.singletonMap(PhasedSelector.DEFAULT, Collections.singleton(mailbox));
} else {
return Collections.emptyMap();
}
}
@Override
public boolean isRecursive() {
return false;
}
}
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