/*
    * 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.logging.log4j.core.config.plugins.validation.validators;
  
  import org.apache.logging.log4j.Logger;
  import org.apache.logging.log4j.core.config.plugins.convert.TypeConverters;
  import org.apache.logging.log4j.core.config.plugins.validation.ConstraintValidator;
  import org.apache.logging.log4j.core.config.plugins.validation.constraints.ValidPort;
  import org.apache.logging.log4j.status.StatusLogger;
  
  /**
   * Validator that checks an object to verify it is a valid port number (an integer between 0 and 65535).
   *
   * @since 2.8
   */
  public class ValidPortValidator implements ConstraintValidator<ValidPort> {
  
      private static final Logger LOGGER = StatusLogger.getLogger();
  
      private ValidPort annotation;
  
      @Override
      public void initialize(final ValidPort annotation) {
          this.annotation = annotation;
      }
  
      @Override
      public boolean isValid(final String name, final Object value) {
          if (value instanceof CharSequence) {
              return isValid(name, TypeConverters.convert(value.toString(), Integer.class, -1));
          }
          if (!Integer.class.isInstance(value)) {
              LOGGER.error(annotation.message());
              return false;
          }
          final int port = (int) value;
          if (port < 0 || port > 65535) {
              LOGGER.error(annotation.message());
              return false;
          }
          return true;
      }
  }