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.streams.kstream.internals.graph;
  
  import org.apache.kafka.streams.kstream.ValueJoinerWithKey;
  
  /**
   * Utility base class containing the common fields between
   * a Stream-Stream join and a Table-Table join
   */
  abstract class BaseJoinProcessorNode<K, V1, V2, VR> extends GraphNode {
  
      private final ProcessorParameters<K, V1, ?, ?> joinThisProcessorParameters;
      private final ProcessorParameters<K, V2, ?, ?> joinOtherProcessorParameters;
      private final ProcessorParameters<K, VR, ?, ?> joinMergeProcessorParameters;
      private final ValueJoinerWithKey<? super K, ? super V1, ? super V2, ? extends VR> valueJoiner;
      private final String thisJoinSideNodeName;
      private final String otherJoinSideNodeName;
  
      BaseJoinProcessorNode(final String nodeName,
                            final ValueJoinerWithKey<? super K, ? super V1, ? super V2, ? extends VR> valueJoiner,
                            final ProcessorParameters<K, V1, ?, ?> joinThisProcessorParameters,
                            final ProcessorParameters<K, V2, ?, ?> joinOtherProcessorParameters,
                            final ProcessorParameters<K, VR, ?, ?> joinMergeProcessorParameters,
                            final String thisJoinSideNodeName,
                            final String otherJoinSideNodeName) {
  
          super(nodeName);
  
          this.valueJoiner = valueJoiner;
          this.joinThisProcessorParameters = joinThisProcessorParameters;
          this.joinOtherProcessorParameters = joinOtherProcessorParameters;
          this.joinMergeProcessorParameters = joinMergeProcessorParameters;
          this.thisJoinSideNodeName = thisJoinSideNodeName;
          this.otherJoinSideNodeName = otherJoinSideNodeName;
      }
  
      // VisibleForTesting
      public ProcessorParameters<K, V1, ?, ?> thisProcessorParameters() {
          return joinThisProcessorParameters;
      }
  
      // VisibleForTesting
      public ProcessorParameters<K, V2, ?, ?> otherProcessorParameters() {
          return joinOtherProcessorParameters;
      }
  
      ProcessorParameters<K, VR, ?, ?> mergeProcessorParameters() {
          return joinMergeProcessorParameters;
      }
  
      String thisJoinSideNodeName() {
          return thisJoinSideNodeName;
      }
  
      String otherJoinSideNodeName() {
          return otherJoinSideNodeName;
      }
  
      @Override
      public String toString() {
          return "BaseJoinProcessorNode{" +
                 "joinThisProcessorParameters=" + joinThisProcessorParameters +
                 ", joinOtherProcessorParameters=" + joinOtherProcessorParameters +
                 ", joinMergeProcessorParameters=" + joinMergeProcessorParameters +
                 ", valueJoiner=" + valueJoiner +
                 ", thisJoinSideNodeName='" + thisJoinSideNodeName + '\'' +
                 ", otherJoinSideNodeName='" + otherJoinSideNodeName + '\'' +
                 "} " + super.toString();
      }
  }
  