| /* |
| * 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.maven.api.services; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| |
| import org.apache.maven.api.Session; |
| import org.apache.maven.api.annotations.Experimental; |
| import org.apache.maven.api.annotations.Nonnull; |
| |
| /** |
| * Base class for requests. |
| * |
| * @since 4.0.0 |
| */ |
| @Experimental |
| abstract class BaseRequest { |
| |
| private final Session session; |
| |
| protected BaseRequest(@Nonnull Session session) { |
| this.session = nonNull(session, "session cannot be null"); |
| } |
| |
| @Nonnull |
| public Session getSession() { |
| return session; |
| } |
| |
| public static <T> T nonNull(T obj, String message) { |
| if (obj == null) { |
| throw new IllegalArgumentException(message); |
| } |
| return obj; |
| } |
| |
| protected static <T> Collection<T> unmodifiable(Collection<T> obj) { |
| return obj != null && !obj.isEmpty() |
| ? Collections.unmodifiableCollection(new ArrayList<>(obj)) |
| : Collections.emptyList(); |
| } |
| } |