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QueryCriteriaValidator.java
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QueryCriteriaValidator.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.thingsearch.service.persistence.query.validation;
import static org.eclipse.ditto.base.model.common.ConditionChecker.checkNotNull;
import java.util.concurrent.CompletionStage;
import org.eclipse.ditto.base.model.signals.commands.Command;
import org.eclipse.ditto.internal.utils.extension.DittoExtensionPoint;
import org.eclipse.ditto.internal.utils.extension.DittoExtensionIds;
import org.eclipse.ditto.rql.query.Query;
import com.typesafe.config.Config;
import akka.actor.ActorSystem;
/**
* Search Query Validator to be loaded by reflection.
* Can be used as an extension point to use custom validation of search queries.
* Implementations MUST have a public constructor taking an actorSystem as argument.
*/
public interface QueryCriteriaValidator extends DittoExtensionPoint {
/**
* Validate a parsed query of a
* {@link org.eclipse.ditto.thingsearch.model.signals.commands.query.ThingSearchQueryCommand}.
*
* @param query The query.
* @return The validated query in a future if it is valid, or a failed future if it is not.
*/
CompletionStage<Query> validateQuery(final Command<?> command, final Query query);
/**
* Loads the implementation of {@code QueryCriteriaValidator} which is configured for the
* {@code ActorSystem}.
*
* @param actorSystem the actorSystem in which the {@code QueryCriteriaValidator} should be loaded.
* @param config the configuration of this extension.
* @return the {@code QueryCriteriaValidator} implementation.
* @throws NullPointerException if {@code actorSystem} is {@code null}.
*/
static QueryCriteriaValidator get(final ActorSystem actorSystem, final Config config) {
checkNotNull(actorSystem, "actorSystem");
checkNotNull(config, "config");
final var extensionIdConfig = ExtensionId.computeConfig(config);
return DittoExtensionIds.get(actorSystem)
.computeIfAbsent(extensionIdConfig, ExtensionId::new)
.get(actorSystem);
}
final class ExtensionId extends DittoExtensionPoint.ExtensionId<QueryCriteriaValidator> {
private static final String CONFIG_KEY = "query-criteria-validator";
private ExtensionId(final ExtensionIdConfig<QueryCriteriaValidator> extensionIdConfig) {
super(extensionIdConfig);
}
static ExtensionIdConfig<QueryCriteriaValidator> computeConfig(final Config config) {
return ExtensionIdConfig.of(QueryCriteriaValidator.class, config, CONFIG_KEY);
}
@Override
protected String getConfigKey() {
return CONFIG_KEY;
}
}
}