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.common.requests;
  
  import org.apache.kafka.common.errors.UnsupportedVersionException;
  import org.apache.kafka.common.message.CreateTopicsRequestData;
  import org.apache.kafka.common.message.CreateTopicsRequestData.CreatableTopic;
  import org.apache.kafka.common.message.CreateTopicsResponseData;
  import org.apache.kafka.common.message.CreateTopicsResponseData.CreatableTopicResult;
  import org.apache.kafka.common.protocol.ApiKeys;
  import org.apache.kafka.common.protocol.Readable;
  
  import java.util.List;
  import java.util.stream.Collectors;
  
  public class CreateTopicsRequest extends AbstractRequest {
      public static class Builder extends AbstractRequest.Builder<CreateTopicsRequest> {
          private final CreateTopicsRequestData data;
  
          public Builder(CreateTopicsRequestData data) {
              super(ApiKeys.CREATE_TOPICS);
              this.data = data;
          }
  
          @Override
          public CreateTopicsRequest build(short version) {
              if (data.validateOnly() && version == 0)
                  throw new UnsupportedVersionException("validateOnly is not supported in version 0 of " +
                          "CreateTopicsRequest");
  
              final List<String> topicsWithDefaults = data.topics()
                  .stream()
                  .filter(topic -> topic.assignments().isEmpty())
                  .filter(topic ->
                      topic.numPartitions() == CreateTopicsRequest.NO_NUM_PARTITIONS
                          || topic.replicationFactor() == CreateTopicsRequest.NO_REPLICATION_FACTOR)
                  .map(CreatableTopic::name)
                  .collect(Collectors.toList());
  
              if (!topicsWithDefaults.isEmpty() && version < 4) {
                  throw new UnsupportedVersionException("Creating topics with default "
                      + "partitions/replication factor are only supported in CreateTopicRequest "
                      + "version 4+. The following topics need values for partitions and replicas: "
                      + topicsWithDefaults);
              }
  
              return new CreateTopicsRequest(data, version);
          }
  
          @Override
          public String toString() {
              return data.toString();
          }
  
          @Override
          public boolean equals(Object other) {
              return other instanceof Builder && this.data.equals(((Builder) other).data);
          }
  
          @Override
          public int hashCode() {
              return data.hashCode();
          }
      }
  
      private final CreateTopicsRequestData data;
  
      public static final int NO_NUM_PARTITIONS = -1;
      public static final short NO_REPLICATION_FACTOR = -1;
  
      public CreateTopicsRequest(CreateTopicsRequestData data, short version) {
          super(ApiKeys.CREATE_TOPICS, version);
          this.data = data;
      }
  
      @Override
      public CreateTopicsRequestData data() {
          return data;
      }
  
      @Override
      public AbstractResponse getErrorResponse(int throttleTimeMs, Throwable e) {
          CreateTopicsResponseData response = new CreateTopicsResponseData();
          if (version() >= 2) {
              response.setThrottleTimeMs(throttleTimeMs);
          }
          ApiError apiError = ApiError.fromThrowable(e);
          for (CreatableTopic topic : data.topics()) {
              response.topics().add(new CreatableTopicResult().
                  setName(topic.name()).
                  setErrorCode(apiError.error().code()).
                  setErrorMessage(apiError.message()));
          }
          return new CreateTopicsResponse(response);
      }
  
      public static CreateTopicsRequest parse(Readable readable, short version) {
          return new CreateTopicsRequest(new CreateTopicsRequestData(readable, version), version);
      }
  }
  