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.Configurable;
  import org.apache.kafka.common.config.ConfigDef;
  import org.apache.kafka.connect.connector.ConnectRecord;
  
  /**
   * <p>A predicate on records.
   * Predicates can be used to conditionally apply a {@link org.apache.kafka.connect.transforms.Transformation}
   * by configuring the transformation's {@code predicate} (and {@code negate}) configuration parameters.
   * In particular, the {@code Filter} transformation can be conditionally applied in order to filter
   * certain records from further processing.
   *
   * <p>Kafka Connect may discover implementations of this interface using the Java {@link java.util.ServiceLoader} mechanism.
   * To support this, implementations of this interface should also contain a service provider configuration file in
   * {@code META-INF/services/org.apache.kafka.connect.transforms.predicates.Predicate}.
   *
   * <p>Implement {@link org.apache.kafka.common.metrics.Monitorable} to enable the predicate to register metrics.
   * The following tags are automatically added to all metrics registered: <code>connector</code> set to connector name,
   * <code>task</code> set to the task id and <code>predicate</code> set to the predicate alias.
   *
   * @param <R> The type of record.
   */
  public interface Predicate<R extends ConnectRecord<R>> extends Configurable, AutoCloseable {
  
      /**
       * Configuration specification for this predicate.
       *
       * @return the configuration definition for this predicate; never null
       */
      ConfigDef config();
  
      /**
       * Returns whether the given record satisfies this predicate.
       *
       * @param record the record to evaluate; may not be null
       * @return true if the predicate matches, or false otherwise
       */
      boolean test(R record);
  
      @Override
      void close();
  }
  