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.AutoOffsetReset;
  import org.apache.kafka.streams.errors.TopologyException;
  import org.apache.kafka.streams.kstream.internals.ConsumedInternal;
  import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.util.Collection;
  import java.util.regex.Pattern;
  
  public class StreamSourceNode<K, V> extends SourceGraphNode<K, V> {
  
      private static final Logger log = LoggerFactory.getLogger(StreamSourceNode.class);
  
      public StreamSourceNode(final String nodeName,
                              final Collection<String> topicNames,
                              final ConsumedInternal<K, V> consumedInternal) {
          super(nodeName, topicNames, consumedInternal);
      }
  
      public StreamSourceNode(final String nodeName,
                              final Pattern topicPattern,
                              final ConsumedInternal<K, V> consumedInternal) {
  
          super(nodeName, topicPattern, consumedInternal);
      }
  
      public void merge(final StreamSourceNode<?, ?> other) {
          final AutoOffsetReset resetPolicy = consumedInternal().offsetResetPolicy();
          final AutoOffsetReset otherResetPolicy = other.consumedInternal().offsetResetPolicy();
          if (resetPolicy != null && !resetPolicy.equals(otherResetPolicy)
              || otherResetPolicy != null && !otherResetPolicy.equals(resetPolicy)) {
              log.error("Tried to merge source nodes {} and {} which are subscribed to the same topic/pattern, but "
                            + "the offset reset policies do not match", this, other);
              throw new TopologyException("Can't configure different offset reset policies on the same input topic(s)");
          }
          for (final GraphNode otherChild : other.children()) {
              other.removeChild(otherChild);
              addChild(otherChild);
          }
      }
  
      @Override
      public String toString() {
          return "StreamSourceNode{" +
                 "topicNames=" + (topicNames().isPresent() ? topicNames().get() : null) +
                 ", topicPattern=" + (topicPattern().isPresent() ? topicPattern().get() : null) +
                 ", consumedInternal=" + consumedInternal() +
                 "} " + super.toString();
      }
  
      @Override
      public void writeToTopology(final InternalTopologyBuilder topologyBuilder) {
  
          if (topicPattern().isPresent()) {
              topologyBuilder.addSource(consumedInternal().offsetResetPolicy(),
                                        nodeName(),
                                        consumedInternal().timestampExtractor(),
                                        consumedInternal().keyDeserializer(),
                                        consumedInternal().valueDeserializer(),
                                        topicPattern().get());
          } else {
              topologyBuilder.addSource(consumedInternal().offsetResetPolicy(),
                                        nodeName(),
                                        consumedInternal().timestampExtractor(),
                                        consumedInternal().keyDeserializer(),
                                        consumedInternal().valueDeserializer(),
                                        topicNames().get().toArray(new String[0]));
          }
      }
  
  }
  