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PolicyCommandToAccessExceptionRegistry.java
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PolicyCommandToAccessExceptionRegistry.java
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/*
* Copyright (c) 2017 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.policies.model.signals.commands.exceptions;
import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import org.eclipse.ditto.base.model.exceptions.DittoRuntimeException;
import org.eclipse.ditto.base.model.signals.commands.AbstractCommandToExceptionRegistry;
import org.eclipse.ditto.policies.model.signals.commands.PolicyCommand;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrievePolicy;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrievePolicyEntries;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrievePolicyEntry;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrievePolicyImport;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrievePolicyImports;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrieveResource;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrieveResources;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrieveSubject;
import org.eclipse.ditto.policies.model.signals.commands.query.RetrieveSubjects;
/**
* Registry to map policy commands to their according access exception.
*/
public final class PolicyCommandToAccessExceptionRegistry
extends AbstractCommandToExceptionRegistry<PolicyCommand<?>, DittoRuntimeException> {
private static final PolicyCommandToAccessExceptionRegistry INSTANCE = createInstance();
private PolicyCommandToAccessExceptionRegistry(
final Map<String, Function<PolicyCommand<?>, DittoRuntimeException>> mappingStrategies) {
super(mappingStrategies);
}
/**
* Returns an instance of {@code PolicyCommandToAccessExceptionRegistry}.
*
* @return the instance.
*/
public static PolicyCommandToAccessExceptionRegistry getInstance() {
return INSTANCE;
}
private static PolicyCommandToAccessExceptionRegistry createInstance() {
final Map<String, Function<PolicyCommand<?>, DittoRuntimeException>> mappingStrategies = new HashMap<>();
mappingStrategies.put(RetrievePolicy.TYPE,
command -> PolicyNotAccessibleException.newBuilder(command.getEntityId())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrievePolicyEntries.TYPE,
command -> PolicyNotAccessibleException.newBuilder(command.getEntityId())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrievePolicyEntry.TYPE,
command -> PolicyEntryNotAccessibleException.newBuilder(command.getEntityId(),
((RetrievePolicyEntry) command).getLabel())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrieveResource.TYPE,
command -> ResourceNotAccessibleException.newBuilder(command.getEntityId(),
((RetrievePolicyEntry) command).getLabel(),
command.getResourcePath().toString())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrieveResources.TYPE,
command -> ResourcesNotAccessibleException.newBuilder(command.getEntityId(),
((RetrievePolicyEntry) command).getLabel())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrieveSubject.TYPE,
command -> SubjectNotAccessibleException.newBuilder(command.getEntityId(),
((RetrieveSubject) command).getLabel(),
((RetrieveSubject) command).getSubjectId())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrieveSubjects.TYPE,
command -> SubjectsNotAccessibleException.newBuilder(command.getEntityId(),
((RetrieveSubjects) command).getLabel())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrievePolicyImports.TYPE,
command -> PolicyImportsNotAccessibleException.newBuilder(command.getEntityId())
.dittoHeaders(command.getDittoHeaders())
.build());
mappingStrategies.put(RetrievePolicyImport.TYPE,
command -> PolicyImportNotAccessibleException.newBuilder(command.getEntityId(),
((RetrievePolicyImport) command).getImportedPolicyId())
.dittoHeaders(command.getDittoHeaders())
.build());
return new PolicyCommandToAccessExceptionRegistry(mappingStrategies);
}
}