/* * 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.collector; import java.util.Optional; class OptionalBuilder<T> { private Optional<T> optional = Optional.empty(); public void set(T value) { if (optional.isPresent()) { throw new IllegalStateException( String.format("Multiple values for Optional type: ['%s','%s',...]", optional.get(), value)); } optional = Optional.ofNullable(value); } public Optional<T> build() { return optional; } }