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SqlObject is a declarative, annotation-driven API for database access. It complements the core API. Jdbi 3 is designed to provide convenient tabular data access in Java(tm) and other JVM based languages. It uses the Java collections framework for query results, provides a convenient means of externalizing SQL statements, and named parameter support for any database that supports JDBC.

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/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jdbi.v3.sqlobject;

import org.jdbi.v3.core.Handle;
import org.jdbi.v3.core.HandleCallback;
import org.jdbi.v3.core.HandleConsumer;

/**
 * SqlObject base interface.  All synthesized implementations implement
 * this interface, even if the declaration doesn't extend {@code SqlObject}.
 *
 * Custom mixins may be written as subinterfaces of this class with default methods.
 */
public interface SqlObject {
    /**
     * Returns the handle used in the current sql object context.
     *
     * @return the handle used in the current sql object context.
     */
    Handle getHandle();

    /**
     * A convenience function which manages the lifecycle of the handle associated to this sql object,
     * and yields it to a callback for use by clients.
     *
     * @param callback A callback which will receive the handle associated to this sql object
     * @param  type returned by the callback
     * @param  exception type thrown by the callback, if any.
     *
     * @return the value returned by callback
     *
     * @throws X any exception thrown by the callback
     */
     R withHandle(HandleCallback callback) throws X;

    /**
     * A convenience function which manages the lifecycle of the handle associated to this sql object,
     * and yields it to a consumer for use by clients.
     *
     * @param consumer A consumer which will receive the handle associated to this sql object
     * @param  exception type thrown by the callback, if any.
     *
     * @throws X any exception thrown by the callback
     */
    default  void useHandle(HandleConsumer consumer) throws X {
        withHandle(consumer.asCallback());
    }
}