content: /*
   * 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.    
   */
  
  package org.apache.bifromq.sysprops.parser;
  
  import lombok.AccessLevel;
  import lombok.NoArgsConstructor;
  
  @NoArgsConstructor(access = AccessLevel.PRIVATE)
  public class BooleanParser implements PropParser<Boolean> {
      public static final BooleanParser INSTANCE = new BooleanParser();
  
      @Override
      public Boolean parse(String value) {
          if ("true".equalsIgnoreCase(value)
              || "y".equalsIgnoreCase(value)
              || "yes".equalsIgnoreCase(value)
              || "1".equals(value)) {
              return true;
          }
          if ("false".equalsIgnoreCase(value)
              || "n".equalsIgnoreCase(value)
              || "no".equalsIgnoreCase(value)
              || "0".equals(value)) {
              return false;
          }
          throw new SysPropParseException(String.format("Unable to parse %s to boolean", value));
      }
  }
  