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.kafka.connect.transforms.predicates;
  
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.common.config.ConfigException;
  import org.apache.kafka.common.utils.AppInfoParser;
  import org.apache.kafka.connect.components.Versioned;
  import org.apache.kafka.connect.connector.ConnectRecord;
  import org.apache.kafka.connect.transforms.util.RegexValidator;
  import org.apache.kafka.connect.transforms.util.SimpleConfig;
  
  import java.util.Map;
  import java.util.regex.Pattern;
  import java.util.regex.PatternSyntaxException;
  
  /**
   * A predicate which is true for records with a topic name that matches the configured regular expression.
   * @param <R> The type of connect record.
   */
  public class TopicNameMatches<R extends ConnectRecord<R>> implements Predicate<R>, Versioned {
  
      private static final String PATTERN_CONFIG = "pattern";
  
      public static final String OVERVIEW_DOC = "A predicate which is true for records with a topic name that matches the configured regular expression.";
  
      public static final ConfigDef CONFIG_DEF = new ConfigDef()
              .define(PATTERN_CONFIG, ConfigDef.Type.STRING, ConfigDef.NO_DEFAULT_VALUE,
              ConfigDef.CompositeValidator.of(new ConfigDef.NonEmptyString(), new RegexValidator()),
              ConfigDef.Importance.MEDIUM,
              "A Java regular expression for matching against the name of a record's topic.");
      private Pattern pattern;
  
      @Override
      public String version() {
          return AppInfoParser.getVersion();
      }
  
      @Override
      public ConfigDef config() {
          return CONFIG_DEF;
      }
  
      @Override
      public boolean test(R record) {
          return record.topic() != null && pattern.matcher(record.topic()).matches();
      }
  
      @Override
      public void close() {
  
      }
  
      @Override
      public void configure(Map<String, ?> configs) {
          SimpleConfig simpleConfig = new SimpleConfig(config(), configs);
          Pattern result;
          String value = simpleConfig.getString(PATTERN_CONFIG);
          try {
              result = Pattern.compile(value);
          } catch (PatternSyntaxException e) {
              throw new ConfigException(PATTERN_CONFIG, value, "entry must be a Java-compatible regular expression: " + e.getMessage());
          }
          this.pattern = result;
      }
  
      @Override
      public String toString() {
          return "TopicNameMatches{" +
                  "pattern=" + pattern +
                  '}';
      }
  }
  