Java Type Coalesce coalesce(final T... ts)

Description

Returns the first non null argument given or null if non of the arguments are non null.

License

Open Source License

Parameter

Parameter	Description
T	The type to return
ts	The elements to scan thru.

Return

The first non null element unless all are null than null is returned.

Declaration

public static <T> T coalesce(final T... ts) 

Method Source Code

//package com.java2s;
/*/*w w w .  j av a2  s .  c o m*/
 * Copyright (c) 2009 Stephan Schloepke and innoQ Deutschland GmbH
 *
 * Stephan Schloepke: http://www.schloepke.de/
 * innoQ Deutschland GmbH: http://www.innoq.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.
 */

public class Main {
    /**
     * Returns the first non null argument given or null if non of the arguments are non null.
     *
     * @param <T> 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> T coalesce(final T... ts) {
        for (final T t : ts) {
            if (t != null) {
                return t;
            }
        }
        return null;
    }
}

Related

1. coalesce(final O... values)
2. coalesce(final String... strings)
3. coalesce(final T eitherThis, final T orThat)
4. coalesce(final T... argv)
5. coalesce(final T... objects)
6. coalesce(float... p)
7. coalesce(Object src, Object defaultValue)
8. coalesce(Object... args)
9. coalesce(Object... items)