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;
  
  import org.apache.kafka.streams.errors.StreamsException;
  import org.apache.kafka.streams.processor.api.ProcessorContext;
  import org.apache.kafka.streams.processor.internals.ProcessorContextImpl;
  import org.apache.kafka.streams.processor.internals.ProcessorNode;
  
  import java.util.Properties;
  
  /**
   * This class provides access to {@link TopologyTestDriver} protected methods.
   * It should only be used for internal testing, in the rare occasions where the
   * necessary functionality is not supported by {@link TopologyTestDriver}.
   */
  public class TopologyTestDriverWrapper extends TopologyTestDriver {
  
  
      public TopologyTestDriverWrapper(final Topology topology,
                                       final Properties config) {
          super(topology, config);
      }
  
      /**
       * Get the processor context, setting the processor whose name is given as current node
       *
       * @param processorName processor name to set as current node
       * @return the processor context
       */
      @SuppressWarnings("unchecked")
      public <K, V> ProcessorContext<K, V> setCurrentNodeForProcessorContext(final String processorName) {
          final ProcessorContext<K, V> context = task.processorContext();
          ((ProcessorContextImpl) context).setCurrentNode(getProcessor(processorName));
          return context;
      }
  
      /**
       * Get a processor by name
       *
       * @param name the name to search for
       * @return the processor matching the search name
       */
      public ProcessorNode<?, ?, ?, ?> getProcessor(final String name) {
          for (final ProcessorNode<?, ?, ?, ?> node : processorTopology.processors()) {
              if (node.name().equals(name)) {
                  return node;
              }
          }
          for (final ProcessorNode<?, ?, ?, ?> node : globalTopology.processors()) {
              if (node.name().equals(name)) {
                  return node;
              }
          }
          throw new StreamsException("Could not find a processor named '" + name + "'");
      }
  }
  