content: /*
   * Inkless
   * Copyright (C) 2024 - 2025 Aiven OY
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package io.aiven.inkless.common.config.validators;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigException;
  
  import com.groupcdg.pitest.annotations.CoverageIgnore;
  
  /**
   * {@link ConfigDef.Validator} implementation that verifies
   * that a config value is a subclass of a specified class.
   */
  public class Subclass implements ConfigDef.Validator {
      private final Class<?> parentClass;
  
      public static Subclass of(final Class<?> parentClass) {
          return new Subclass(parentClass);
      }
  
      public Subclass(final Class<?> parentClass) {
          this.parentClass = parentClass;
      }
  
      @Override
      public void ensureValid(final String name, final Object value) {
          if (value != null && !(parentClass.isAssignableFrom((Class<?>) value))) {
              throw new ConfigException(name + " should be a subclass of " + parentClass.getCanonicalName());
          }
      }
  
      @CoverageIgnore
      @Override
      public String toString() {
          return "Any implementation of " + parentClass.getName();
      }
  }
  