| /* |
| * 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 |
| * |
| * 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.apache.geronimo.microprofile.opentracing.common.spi; |
| |
| import java.util.Iterator; |
| import java.util.ServiceLoader; |
| |
| public interface Container { |
| <T> T lookup(Class<T> type); |
| |
| static Container get() { |
| final Iterator<Container> iterator = ServiceLoader.load(Container.class).iterator(); |
| if (!iterator.hasNext()) { |
| throw new IllegalArgumentException("No implementation of Container found"); |
| } |
| return iterator.next(); |
| } |
| |
| @FunctionalInterface |
| interface Unwrappable { |
| Object unwrap(); |
| } |
| } |