com.speedment.runtime.core.db.SqlFunction Maven / Gradle / Ivy

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A Speedment bundle that shades all dependencies into one jar. This is useful when deploying an application on a server.

There is a newer version: 3.1.18

/**
 *
 * Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
 *
 * 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 com.speedment.runtime.core.db;

import com.speedment.runtime.core.exception.SpeedmentException;
import java.sql.SQLException;
import java.util.Objects;
import static java.util.Objects.requireNonNull;
import java.util.function.Function;

/**
 * A variation of the standard {@code java.util.function.Function} that throws
 * a {@code SQLException} if an error occurred while the function was applied.
 *
 * @param   input type
 * @param   result type
 * 
 * @author  Per Minborg
 */
@FunctionalInterface
public interface SqlFunction {

    R apply(T t) throws SQLException;

    static  SqlFunction wrap(Function inner) {
        return requireNonNull(inner)::apply;
    }

    default Function unWrap() {
        return t -> {
            try {
                return this.apply(t);
            } catch (SQLException sqle) {
                throw new SpeedmentException(sqle);
            }
        };
    }

    default  SqlFunction compose(SqlFunction before) {
        Objects.requireNonNull(before);
        return (V v) -> apply(before.apply(v));
    }

    default  SqlFunction andThen(SqlFunction after) {
        Objects.requireNonNull(after);
        return (T t) -> after.apply(apply(t));
    }

    static  SqlFunction identity() {
        return (T t) -> t;
    }
}