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/*
* 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 org.apache.commons.math3.exception.util;
import java.util.List;
import java.util.ArrayList;
/**
* Utility class for transforming the list of arguments passed to
* constructors of exceptions.
*
*/
public class ArgUtils {
/**
* Class contains only static methods.
*/
private ArgUtils() {}
/**
* Transform a multidimensional array into a one-dimensional list.
*
* @param array Array (possibly multidimensional).
* @return a list of all the {@code Object} instances contained in
* {@code array}.
*/
public static Object[] flatten(Object[] array) {
final List<Object> list = new ArrayList<Object>();
if (array != null) {
for (Object o : array) {
if (o instanceof Object[]) {
for (Object oR : flatten((Object[]) o)) {
list.add(oR);
}
} else {
list.add(o);
}
}
}
return list.toArray();
}
}
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