@@ -0,0 +1,1400 @@
+/*%0A * Licensed to the Apache Software Foundation (ASF) under one or more%0A * contributor license agreements. See the NOTICE file distributed with%0A * this work for additional information regarding copyright ownership.%0A * The ASF licenses this file to You under the Apache license, Version 2.0%0A * (the %22License%22); you may not use this file except in compliance with%0A * the License. You may obtain a copy of the License at%0A *%0A *      http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the license for the specific language governing permissions and%0A * limitations under the license.%0A */%0Apackage org.apache.logging.log4j.core.helpers;%0A%0Apublic class Booleans %7B%0A%0A    /**%0A     * @param s%0A     *            a %7B@code String%7D containing the %7B@code boolean%7D representation to parse, may be %7B@code null%7D or%0A     *            %7B@code %22%22%7D%0A     * @param defaultValue%0A     *            the return value, use %7B@code defaultValue%7D if %7B@code s%7D is %7B@code null%7D or %7B@code %22%22%7D%0A     * @return the boolean value represented by the argument.%0A     */%0A    public static boolean parseBoolean(String s, boolean defaultValue) %7B%0A        return Strings.isEmpty(s) ? defaultValue : Boolean.parseBoolean(s);%0A    %7D%0A%0A%7D%0A

Refactor duplicate code in a new API Boolean.parseBoolean(String, boolean), which also checks for empty strings in addition to nulls.