/*

 * Copyright (c)  2017, 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 * 

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 * 

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 * 

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 * 

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.incubator.sql2;

import java.time.Duration;

import java.util.concurrent.CompletionStage;

import java.util.function.BiConsumer;

import java.util.function.Consumer;

import java.util.function.Function;

/**

 * A multi-operation is an {@link Operation} that returns one or more results in

 * addition to the out result defined by the {@link Operation}. Each result is

 * ISSUE: Should this have a collector?

 *

 * @param <T> The type of the result of this {@link Operation}

 */

public interface MultiOperation<T> extends OutOperation<T> {

  /**

   * Returns a {@link RowOperation} to process a row sequence result. The

   * {@link Operation}s are executed in the order they are submitted. If a

   * result is of the wrong type for the next submitted {@link Operation} the

   *

   * @return a {@link RowOperation} that is part of this {@link MultiOperation}

   */

  public RowOperation<T> rowOperation();

  /**

   * result is of the wrong type for the next submitted {@link Operation} the

   *

   */

  /**

   *

   */

  /**

   * If this method is not called any trailing count results are ignored.

   *

   * @param handler not null

   * @return this MultiOperation

   * @throws IllegalStateException if this method was called previously

   */

  /**

   * If this method is not called any trailing row sequence results are ignored.

   *

   * @param handler

   * @return This MultiOperation

   * @throws IllegalStateException if this method was called previously

   */

  public MultiOperation<T> onRows(BiConsumer<Integer, RowOperation<T>> handler);

  /**

   * number of results, including errors, that preceeded the current error. The

   * second argument is a {@link Throwable} corresponding to the error. When the

   * @param handler a BiConsumer that handles an error

   * @return this MultiOperation

   */

  public MultiOperation<T> onError(BiConsumer<Integer, Throwable> handler);

  // Covariant overrides

  /**

   * This handler is called if the execution fails completely. If the execution

   * returns any individual results, even if any or all of those results are

   * errors, this handler is not called.

   * @param handler

   */

  @Override

  public MultiOperation<T> onError(Consumer<Throwable> handler);

  @Override

  @Override

  public MultiOperation<T> outParameter(String id, SqlType type);

  @Override

  public MultiOperation<T> set(String id, Object value, SqlType type);

  @Override

  public MultiOperation<T> set(String id, Object value);

  @Override

  public MultiOperation<T> set(String id, CompletionStage<?> source, SqlType type);

  @Override

  public MultiOperation<T> set(String id, CompletionStage<?> source);

  @Override

  public MultiOperation<T> timeout(Duration minTime);

}