content: package com.alibaba.excel.util;
  
  /**
   * 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.
   *
   * @author Apache Software Foundation (ASF)
   */
  public class BooleanUtils {
  
      private static final String TRUE_NUMBER = "1";
  
      private BooleanUtils() {}
  
      /**
       * String to boolean
       *
       * @param str
       * @return
       */
      public static Boolean valueOf(String str) {
          if (TRUE_NUMBER.equals(str)) {
              return Boolean.TRUE;
          } else {
              return Boolean.FALSE;
          }
      }
  
  
      // boolean Boolean methods
      //-----------------------------------------------------------------------
      /**
       * <p>Checks if a {@code Boolean} value is {@code true},
       * handling {@code null} by returning {@code false}.</p>
       *
       * <pre>
       *   BooleanUtils.isTrue(Boolean.TRUE)  = true
       *   BooleanUtils.isTrue(Boolean.FALSE) = false
       *   BooleanUtils.isTrue(null)          = false
       * </pre>
       *
       * @param bool  the boolean to check, null returns {@code false}
       * @return {@code true} only if the input is non-null and true
       * @since 2.1
       */
      public static boolean isTrue(final Boolean bool) {
          return Boolean.TRUE.equals(bool);
      }
  
      /**
       * <p>Checks if a {@code Boolean} value is <i>not</i> {@code true},
       * handling {@code null} by returning {@code true}.</p>
       *
       * <pre>
       *   BooleanUtils.isNotTrue(Boolean.TRUE)  = false
       *   BooleanUtils.isNotTrue(Boolean.FALSE) = true
       *   BooleanUtils.isNotTrue(null)          = true
       * </pre>
       *
       * @param bool  the boolean to check, null returns {@code true}
       * @return {@code true} if the input is null or false
       * @since 2.3
       */
      public static boolean isNotTrue(final Boolean bool) {
          return !isTrue(bool);
      }
  
      /**
       * <p>Checks if a {@code Boolean} value is {@code false},
       * handling {@code null} by returning {@code false}.</p>
       *
       * <pre>
       *   BooleanUtils.isFalse(Boolean.TRUE)  = false
       *   BooleanUtils.isFalse(Boolean.FALSE) = true
       *   BooleanUtils.isFalse(null)          = false
       * </pre>
       *
       * @param bool  the boolean to check, null returns {@code false}
       * @return {@code true} only if the input is non-null and false
       * @since 2.1
       */
      public static boolean isFalse(final Boolean bool) {
          return Boolean.FALSE.equals(bool);
      }
  
      /**
       * <p>Checks if a {@code Boolean} value is <i>not</i> {@code false},
       * handling {@code null} by returning {@code true}.</p>
       *
       * <pre>
       *   BooleanUtils.isNotFalse(Boolean.TRUE)  = true
       *   BooleanUtils.isNotFalse(Boolean.FALSE) = false
       *   BooleanUtils.isNotFalse(null)          = true
       * </pre>
       *
       * @param bool  the boolean to check, null returns {@code true}
       * @return {@code true} if the input is null or true
       * @since 2.3
       */
      public static boolean isNotFalse(final Boolean bool) {
          return !isFalse(bool);
      }
  
  }
  