it.bz.opendatahub.alpinebits.validation.utils.ListUtil Maven / Gradle / Ivy
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
package it.bz.opendatahub.alpinebits.validation.utils;
import java.util.List;
/**
* Simple list utilities.
*/
public final class ListUtil {
private ListUtil() {
// Empty
}
/**
* Extract first entry from list, if such an entry exists.
*
* @param list A list with elements, from where the first element should
* be extracted.
* @param The type of list elements and the the type of the expected
* first element.
* @return The first element in the list. If the list is null or there
* are no elements in the list, then null is returned.
*/
public static T extractFirst(List list) {
return list == null || list.isEmpty() ? null : list.get(0);
}
}