geronimo-opentracing-common/src/main/java/org/apache/geronimo/microprofile/opentracing/common/spi/Container.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
 *
 * 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();
    }
}