content: /*
   * Copyright 2019 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 java.net.MalformedURLException;
  import java.net.URL;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigException;
  
  class UrlValidator implements ConfigDef.Validator {
  
      private final boolean skipNullString;
  
      UrlValidator() {
          this(false);
      }
  
      UrlValidator(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");
          }
          try {
              new URL((String) value);
          } catch (final MalformedURLException e) {
              throw new ConfigException(name, value, "malformed URL");
          }
      }
  
      @Override
      public String toString() {
          return "HTTP(S) URL";
      }
  
  }
  