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PolicyAnnouncementAdapter.java
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/
PolicyAnnouncementAdapter.java
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/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.protocoladapter.policies;
import static java.util.Objects.requireNonNull;
import java.util.Collections;
import java.util.Set;
import org.eclipse.ditto.protocoladapter.Adaptable;
import org.eclipse.ditto.protocoladapter.HeaderTranslator;
import org.eclipse.ditto.protocoladapter.TopicPath;
import org.eclipse.ditto.protocoladapter.UnknownTopicPathException;
import org.eclipse.ditto.protocoladapter.adaptables.MappingStrategiesFactory;
import org.eclipse.ditto.protocoladapter.signals.SignalMapperFactory;
import org.eclipse.ditto.signals.announcements.policies.PolicyAnnouncement;
/**
* Adapter for mapping a {@link PolicyAnnouncement} to and from an {@link org.eclipse.ditto.protocoladapter.Adaptable}.
*/
final class PolicyAnnouncementAdapter extends AbstractPolicyAdapter<PolicyAnnouncement<?>> {
private PolicyAnnouncementAdapter(final HeaderTranslator headerTranslator) {
super(MappingStrategiesFactory.getPolicyAnnouncementMappingStrategies(),
SignalMapperFactory.newPolicyAnnouncementSignalMapper(),
headerTranslator);
}
/**
* Returns a new PolicyAnnouncementAdapter.
*
* @param headerTranslator translator between external and Ditto headers.
* @return the adapter.
*/
public static PolicyAnnouncementAdapter of(final HeaderTranslator headerTranslator) {
return new PolicyAnnouncementAdapter(requireNonNull(headerTranslator));
}
@Override
public Set<TopicPath.Criterion> getCriteria() {
return Collections.singleton(TopicPath.Criterion.ANNOUNCEMENTS);
}
@Override
public Set<TopicPath.Action> getActions() {
return Collections.emptySet();
}
@Override
public boolean isForResponses() {
return false;
}
@Override
protected String getType(final Adaptable adaptable) {
final TopicPath topicPath = adaptable.getTopicPath();
final String commandName =
topicPath.getSubject().orElseThrow(() -> UnknownTopicPathException.newBuilder(topicPath).build());
return topicPath.getGroup() + "." + getTypeCriterionAsString(topicPath) + ":" + commandName;
}
}