/*
 * 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
 *
 *  https://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.
 *
 * Other licenses:
 * -----------------------------------------------------------------------------
 * Commercial licenses for this work are available. These replace the above
 * Apache-2.0 license and offer limited warranties, support, maintenance, and
 * commercial database integrations.
 *
 * For more information, please visit: https://www.jooq.org/legal/licensing
 *
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 */
package org.jooq;

import java.sql.Statement;
import java.util.List;

import org.jetbrains.annotations.NotNull;

/**
 * The <code>Loader</code> API is used for configuring data loads.
 * <p>
 * This type is the final type holding information about the outcome of the data
 * load.
 *
 * @author Lukas Eder
 */
public interface Loader<R extends Record> {

    /**
     * A list of errors that might have happened during the load.
     */
    @NotNull @CheckReturnValue
    List<LoaderError> errors();

    /**
     * The number of processed rows.
     */
    int processed();

    /**
     * The number of executed statements, bulk statements, or batch statements.
     */
    int executed();

    /**
     * The number of ignored rows.
     * <p>
     * If using {@link LoaderOptionsStep#onDuplicateKeyIgnore()} along with
     * {@link LoaderOptionsStep#batchAll()} or
     * {@link LoaderOptionsStep#batchAfter(int)}, it may be possible that some
     * dialects will not produce the correct ignored count, as the respective
     * JDBC drivers cannot produce this count over
     * {@link Statement#executeBatch()} and related methods.
     */
    int ignored();

    /**
     * The number of inserted or updated rows.
     */
    int stored();

    /**
     * The results that are also returned from {@link Loader}.
     */
    @NotNull @CheckReturnValue
    LoaderContext result();

}
