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.trogdor.workload;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  
  /**
   * A PayloadGenerator which always generates a constant payload.
   */
  public class ConstantPayloadGenerator implements PayloadGenerator {
      private final int size;
      private final byte[] value;
  
      @JsonCreator
      public ConstantPayloadGenerator(@JsonProperty("size") int size,
                                      @JsonProperty("value") byte[] value) {
          this.size = size;
          this.value = (value == null || value.length == 0) ? new byte[size] : value;
      }
  
      @JsonProperty
      public int size() {
          return size;
      }
  
      @JsonProperty
      public byte[] value() {
          return value;
      }
  
      @Override
      public byte[] generate(long position) {
          byte[] next = new byte[size];
          for (int i = 0; i < next.length; i += value.length) {
              System.arraycopy(value, 0, next, i, Math.min(next.length - i, value.length));
          }
          return next;
      }
  }
  