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}