/*
* 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.
*/
/**
* Operations on boolean primitives and Boolean objects.
*
* This class tries to handle null input gracefully.
* An exception will not be thrown for a null input.
* Each method documents its behaviour in more detail.
*
* @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 {
/**
* Converts a Boolean to a String returning 'true',
* 'false', or null.
*
*
* BooleanUtils.toStringTrueFalse(Boolean.TRUE) = "true"
* BooleanUtils.toStringTrueFalse(Boolean.FALSE) = "false"
* BooleanUtils.toStringTrueFalse(null) = null;
*
*
* @param bool the Boolean to check
* @return 'true', 'false',
* or null
*/
public static String toStringTrueFalse(Boolean bool) {
return toString(bool, "true", "false", null);
}
/**
* Converts a Boolean to a String returning one of the input Strings.
*
*
* BooleanUtils.toString(Boolean.TRUE, "true", "false", null) = "true"
* BooleanUtils.toString(Boolean.FALSE, "true", "false", null) = "false"
* BooleanUtils.toString(null, "true", "false", null) = null;
*
*
* @param bool the Boolean to check
* @param trueString the String to return if true,
* may be null
* @param falseString the String to return if false,
* may be null
* @param nullString the String to return if null,
* may be null
* @return one of the three input Strings
*/
public static String toString(Boolean bool, String trueString, String falseString, String nullString) {
if (bool == null) {
return nullString;
}
return bool.booleanValue() ? trueString : falseString;
}
}