Main.java Source code

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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.
 */

/**
 * <p>Operations on boolean primitives and Boolean objects.</p>
 *
 * <p>This class tries to handle <code>null</code> input gracefully.
 * An exception will not be thrown for a <code>null</code> input.
 * Each method documents its behaviour in more detail.</p>
 * 
 * @author Stephen Colebourne
 * @author Matthew Hawthorne
 * @author Gary Gregory
 * @since 2.0
 * @version $Id: BooleanUtils.java 589050 2007-10-27 05:07:45Z bayard $
 */
public class Main {
    /**
     * <p>Converts a Boolean to a Integer using the convention that
     * <code>zero</code> is <code>false</code>.</p>
     *
     * <p><code>null</code> will be converted to <code>null</code>.</p>
     *
     * <pre>
     *   BooleanUtils.toIntegerObject(Boolean.TRUE)  = new Integer(1)
     *   BooleanUtils.toIntegerObject(Boolean.FALSE) = new Integer(0)
     * </pre>
     *
     * @param bool  the Boolean to convert
     * @return one if Boolean.TRUE, zero if Boolean.FALSE, <code>null</code> if <code>null</code>
     */
    public static Integer toIntegerObject(Boolean bool) {
        if (bool == null) {
            return null;
        }
        return bool.booleanValue() ? 1 : 0;
    }

}