content: /*
   * Copyright 2021 Aiven Oy and http-connector-for-apache-kafka project contributors
   *
   * Licensed 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 io.aiven.kafka.connect.http.config;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigException;
  
  public class NonBlankStringValidator implements ConfigDef.Validator {
      private final boolean skipNullString;
  
      public NonBlankStringValidator(final boolean skipNullString) {
          this.skipNullString = skipNullString;
      }
  
      @Override
      public void ensureValid(final String name, final Object value) {
          if (skipNullString && value == null) {
              return;
          }
  
          if (value == null) {
              throw new ConfigException(name, null, "can't be null");
          }
  
          if (!(value instanceof String)) {
              throw new ConfigException(name, value, "must be string");
          }
  
          final var stringValue = (String) value;
          if (stringValue.isBlank()) {
              throw new ConfigException(name, value, "String must be non-blank");
          }
      }
  
      @Override
      public String toString() {
          return "Non-blank string";
      }
  }
  