001/* 002 * Copyright 2021 Global Biodiversity Information Facility (GBIF) 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.gbif.utils; 017 018public final class ObjectUtils { 019 020 private ObjectUtils() { 021 } 022 023 /** 024 * Returns the first of the given parameters that is not null. 025 * If all given parameters are null, returns null. 026 * 027 * @param items 028 * @param <T> 029 * @return 030 */ 031 public static <T> T coalesce(T ... items) { 032 if (items != null) { 033 for (T i : items) if (i != null) return i; 034 } 035 return null; 036 } 037 038 public static <T> T coalesce(Iterable<T> items) { 039 if (items != null) { 040 for (T i : items) if (i != null) return i; 041 } 042 return null; 043 } 044}