org.jbasics.utilities.DataUtilities Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jbasics Show documentation

jBasics is a collection of useful utility classes for Java. This includes helper for XML, mathematic functions, restful web services helper, pattern oriented programming interfaces and more. Currently Java7 and up is supported. Version 1.0 will required at leaset Java8.

There is a newer version: 2.0.0p3

Show newest version

/*
 * Copyright (c) 2009-2015
 * 	IT-Consulting Stephan Schloepke (http://www.schloepke.de/)
 * 	klemm software consulting Mirko Klemm (http://www.klemm-scs.com/)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jbasics.utilities;

/**
 * Utility class offering some often needed functions on any type of data.
 *
 * @author Stephan Schloepke
 * @since 1.0
 */
public final class DataUtilities {

	protected DataUtilities() {
		// Hinder accidental instantiation
	}

	/**
	 * Returns the first non null argument given or null if non of the arguments are non null.
	 *
	 * @param  The type to return
	 * @param ts  The elements to scan thru.
	 *
	 * @return The first non null element unless all are null than null is returned.
	 */
	public static  T coalesce(final T... ts) {
		for (final T t : ts) {
			if (t != null) {
				return t;
			}
		}
		return null;
	}

	/**
	 * Returns true if the enum instance is one of the enum list.
	 *
	 * @param       The enum type
	 * @param instance The instance to check (null always yields false)
	 * @param enumList The list to check the instance against (null or empty always leads false)
	 *
	 * @return True of the enum instance on of the enum list element.
	 */
	public static > boolean isEnumInList(final T instance, final T... enumList) {
		if (instance != null && enumList != null && enumList.length > 0) {
			for (final T temp : enumList) {
				if (temp == instance) {
					return true;
				}
			}
		}
		return false;
	}

	/**
	 * Returns true if the enum instance is one of the enum list.
	 *
	 * @param       The type of the check
	 * @param instance The instance to check (null always yields false)
	 * @param list The list to check the instance against (null or empty always leads false)
	 *
	 * @return True of the enum instance on of the enum list element.
	 */
	public static  boolean isInList(final T instance, final T... list) {
		if (instance != null && list != null && list.length > 0) {
			for (final T temp : list) {
				if (temp == instance || temp.equals(instance)) {
					return true;
				}
			}
		}
		return false;
	}

}