code: /*
   * 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.skywalking.generator;
  
  import com.fasterxml.jackson.annotation.JsonSubTypes;
  import com.fasterxml.jackson.annotation.JsonSubTypes.Type;
  import com.fasterxml.jackson.annotation.JsonTypeInfo;
  
  @JsonTypeInfo(
      use = JsonTypeInfo.Id.NAME,
      include = JsonTypeInfo.As.PROPERTY,
      property = "type")
  @JsonSubTypes({
      @Type(value = StringGenerator.class, name = "randomString"),
      @Type(value = BoolGenerator.class, name = "randomBool"),
      @Type(value = IntGenerator.class, name = "randomInt"),
      @Type(value = ListGenerator.class, name = "randomList"),
      @Type(value = FixedStringGenerator.class, name = "fixedString"),
      @Type(value = SequenceGenerator.class, name = "sequence"),
      @Type(value = UUIDGenerator.class, name = "uuid"),
  })
  public interface Generator<T> {
      public T next();
  
      default public void reset() {
      }
  }
  