http://jdbi.org/: jdbi is designed to provide convenient tabular data access in Java(tm). It uses the Java collections framework for query results, provides a convenient means of externalizing sql statements, and provides named parameter support for any database being used. 
/*
 * 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.core.internal;

import java.util.Optional;
import java.util.stream.Stream;

public class JdbiStreams {
    private JdbiStreams() {
        throw new UnsupportedOperationException("utility class");
    }

    public static <T> Stream<T> toStream(Optional<T> optional) {
        return optional.isPresent() ? Stream.of(optional.get()) : Stream.empty();
    }
}