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GetQuery.java
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GetQuery.java
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/*
* Copyright (c) 2019 Otavio Santana and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the Eclipse
* Public License v. 2.0 are satisfied: GNU General Public License, version 2
* with the GNU Classpath Exception which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.nosql.query;
import jakarta.nosql.ServiceLoaderProvider;
import java.util.List;
import java.util.Objects;
import java.util.ServiceLoader;
import java.util.function.Function;
/**
* To retrieve one or more entities use the <b>GET</b> statement.
* This query is particular to a key-value database.
*/
public interface GetQuery extends Query {
/**
* The keys to being retrieved from the query
*
* @return the keys
*/
List<QueryValue<?>> getKeys();
/**
* Obtains an instance of {@link GetQuery} from a text string.
*
* @param query the query
* @return {@link GetQuery} instance
* @throws NullPointerException when the query is null
* @throws QuerySyntaxException if the text cannot be parsed
* @throws jakarta.nosql.ProviderNotFoundException when the provider is not found
*/
static GetQuery parse(String query) {
Objects.requireNonNull(query, "query is required");
return ServiceLoaderProvider.get(GetQueryProvider.class,
() -> ServiceLoader.load(GetQueryProvider.class)).apply(query);
}
/**
* A provider to {@link GetQuery}
*/
interface GetQueryProvider extends Function<String, GetQuery> {
}
}