Java tutorial
/* * 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 com.cdancy.bitbucket.rest.utils; import java.util.List; import java.util.Map; import com.google.common.collect.ImmutableList; import com.google.common.collect.ImmutableMap; public class Utils { public static <T> List<T> nullToEmpty(Iterable<? extends T> input) { return (List<T>) (input == null ? ImmutableList.<T>of() : ImmutableList.copyOf(input)); } public static <K, V> Map<K, V> nullToEmpty(Map<? extends K, ? extends V> input) { return (Map<K, V>) (input == null ? ImmutableMap.<K, V>of() : ImmutableMap.copyOf(input)); } }