Java tutorial
//package com.java2s; /** * Copyright (C) 2013-2015 all@code-story.net * * 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 */ import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Main { public static List<Object> contextAsList(Object context) { if (context instanceof Iterable<?>) { List<Object> list = new ArrayList<>(); ((Iterable<?>) context).forEach(value -> list.add(value)); return list; } return Collections.singletonList(context); } }