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 io.jafka.api;
  
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.List;
  
  import io.jafka.network.Request;
  
  /**
   * Multi fetch request
   * 
   * @author adyliu (imxylz@gmail.com)
   * @since 1.0
   */
  public class MultiFetchRequest implements Request {
  
      public final List<FetchRequest> fetches;
  
      public MultiFetchRequest(List<FetchRequest> fetches) {
          this.fetches = fetches;
      }
  
      public RequestKeys getRequestKey() {
          return RequestKeys.MULTIFETCH;
      }
  
      /**
       * @return the fetches
       */
      public List<FetchRequest> getFetches() {
          return fetches;
      }
  
      public int getSizeInBytes() {
          int size = 2;
          for (FetchRequest fetch : fetches) {
              size += fetch.getSizeInBytes();
          }
          return size;
      }
  
      public void writeTo(ByteBuffer buffer) {
          if (fetches.size() > Short.MAX_VALUE) {//max 32767
              throw new IllegalArgumentException("Number of requests in MultiFetchRequest exceeds " + Short.MAX_VALUE + ".");
          }
          buffer.putShort((short) fetches.size());
          for (FetchRequest fetch : fetches) {
              fetch.writeTo(buffer);
          }
      }
  
      public static MultiFetchRequest readFrom(ByteBuffer buffer) {
          int count = buffer.getShort();
          List<FetchRequest> fetches = new ArrayList<FetchRequest>(count);
          for (int i = 0; i < count; i++) {
              fetches.add(FetchRequest.readFrom(buffer));
          }
          return new MultiFetchRequest(fetches);
      }
  }
  