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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
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/*
* Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
* All rights reserved.
*
* Licensed 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.databene.commons.operation;
import org.databene.commons.Operation;
/**
* Returns the first non-null argument as the operation result.
* Created: 03.08.2007 07:17:31
* @param the argument and result type of the operation
* @author Volker Bergmann
*/
public class FirstNonNullSelector implements Operation {
@Override
public E perform(E ... args) {
if (args.length == 0)
return null;
for (E arg : args)
if (arg != null)
return arg;
return null;
}
}