/
ResourcesModifiedStrategy.java
41 lines (36 loc) · 1.68 KB
/
ResourcesModifiedStrategy.java
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/*
* Copyright (c) 2019 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.services.policies.persistence.actors.strategies.events;
import static org.eclipse.ditto.model.base.common.ConditionChecker.checkNotNull;
import javax.annotation.Nullable;
import org.eclipse.ditto.model.policies.PoliciesModelFactory;
import org.eclipse.ditto.model.policies.Policy;
import org.eclipse.ditto.services.utils.persistentactors.events.EventStrategy;
import org.eclipse.ditto.signals.events.policies.ResourcesModified;
/**
* This strategy handles {@link org.eclipse.ditto.signals.events.policies.ResourcesModified} events.
*/
final class ResourcesModifiedStrategy implements EventStrategy<ResourcesModified, Policy> {
@Override
public Policy handle(final ResourcesModified rm, @Nullable final Policy policy, final long revision) {
return checkNotNull(policy, "policy").getEntryFor(rm.getLabel())
.map(policyEntry -> PoliciesModelFactory
.newPolicyEntry(rm.getLabel(), policyEntry.getSubjects(), rm.getResources()))
.map(modifiedPolicyEntry -> policy.toBuilder()
.set(modifiedPolicyEntry)
.setRevision(revision)
.setModified(rm.getTimestamp().orElse(null))
.build())
.orElse(policy);
}
}