1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17package org.apache.commons.math.exception.util; 18 19import java.util.List; 20import java.util.ArrayList; 21 22/** 23 * Utility class for transforming the list of arguments passed to 24 * constructors of exceptions. 25 * 26 * @version $Revision$ $Date$ 27 * @since 2.2 28 */ 29public class ArgUtils { 30 /** 31 * Private constructor 32 */ 33 private ArgUtils() { 34 } 35 36 /** 37 * Transform a multidimensional array into a one-dimensional list. 38 * 39 * @param array Array (possibly multidimensional). 40 * @return a list of all the {@code Object} instances contained in 41 * {@code array}. 42 */ 43 public static Object[] flatten(Object[] array) { 44 final List<Object> list = new ArrayList<Object>(); 45 if (array != null) { 46 for (Object o : array) { 47 if (o instanceof Object[]) { 48 for (Object oR : flatten((Object[]) o)) { 49 list.add(oR); 50 } 51 } else { 52 list.add(o); 53 } 54 } 55 } 56 return list.toArray(); 57 } 58} 59