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ModifyAclEntrySubstitutionStrategy.java
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ModifyAclEntrySubstitutionStrategy.java
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/*
* Copyright (c) 2017 Bosch Software Innovations GmbH.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/epl-2.0/index.php
*
* Contributors:
* Bosch Software Innovations GmbH - initial contribution
*/
package org.eclipse.ditto.services.concierge.enforcement.placeholders.strategies;
import static java.util.Objects.requireNonNull;
import org.eclipse.ditto.model.base.auth.AuthorizationSubject;
import org.eclipse.ditto.model.base.headers.DittoHeaders;
import org.eclipse.ditto.model.base.headers.WithDittoHeaders;
import org.eclipse.ditto.model.things.AclEntry;
import org.eclipse.ditto.services.concierge.enforcement.placeholders.HeaderBasedPlaceholderSubstitutionAlgorithm;
import org.eclipse.ditto.signals.commands.things.modify.ModifyAclEntry;
/**
* Handles substitution for ACL {@link AuthorizationSubject}s inside a {@link ModifyAclEntry} command.
*/
final class ModifyAclEntrySubstitutionStrategy extends AbstractTypedSubstitutionStrategy<ModifyAclEntry> {
ModifyAclEntrySubstitutionStrategy() {
super(ModifyAclEntry.class);
}
@Override
public WithDittoHeaders apply(final ModifyAclEntry modifyAclEntry,
final HeaderBasedPlaceholderSubstitutionAlgorithm substitutionAlgorithm) {
requireNonNull(modifyAclEntry);
requireNonNull(substitutionAlgorithm);
final DittoHeaders dittoHeaders = modifyAclEntry.getDittoHeaders();
final AclEntry existingAclEntry = modifyAclEntry.getAclEntry();
final AclEntry substitutedAclEntry = substituteAclEntry(existingAclEntry, substitutionAlgorithm, dittoHeaders);
if (existingAclEntry.equals(substitutedAclEntry)) {
return modifyAclEntry;
} else {
return ModifyAclEntry.of(modifyAclEntry.getThingId(), substitutedAclEntry, dittoHeaders);
}
}
}