src/main/java/org/apache/commons/dbutils/ResultSetHandler.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

package org.apache.commons.dbutils;

import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * Implementations of this interface convert ResultSets into other objects.
 *
 * @param <T> the target type the input ResultSet will be converted to.
 */
public interface ResultSetHandler<T> {

    /**
     * Handles a {@link ResultSet}, usually by converting it into an Object.
     *
     * @param resultSet The {@link ResultSet} to handle. It has not been touched before being passed to this method.
     * @return An Object initialized with {@code ResultSet} data. It is legal for implementations to return {@code null} if the {@link ResultSet} contained 0
     *         rows.
     * @throws SQLException if a database access error occurs
     */
    T handle(ResultSet resultSet) throws SQLException;
}