text: /*
   * 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.submarine.server.api.notebook;
  
  import org.apache.submarine.commons.utils.AbstractUniqueIdGenerator;
  
  /**
   * The unique id for notebook. Formatter:
   * notebook_${server_timestamp}_${counter} Such as:
   * notebook_1577627710_0001
   */
  public class NotebookId extends AbstractUniqueIdGenerator<NotebookId> {
    private static final String NOTEBOOK_ID_PREFIX = "notebook_";
  
    /**
     * Get the object of NotebookId.
     * @param notebookId string
     * @return object
     */
    public static NotebookId fromString(String notebookId) {
      if (notebookId == null) {
        return null;
      }
      String[] components = notebookId.split("\\_");
      if (components.length != 3) {
        return null;
      }
      return NotebookId.newInstance(Long.parseLong(components[1]), Integer.parseInt(components[2]));
    }
  
    /**
     * Get the object of NotebookId.
     * @param serverTimestamp timestamp
     * @param id count
     * @return object
     */
    public static NotebookId newInstance(long serverTimestamp, int id) {
      NotebookId notebookId = new NotebookId();
      notebookId.setServerTimestamp(serverTimestamp);
      notebookId.setId(id);
      return notebookId;
    }
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder(64);
      sb.append(NOTEBOOK_ID_PREFIX).append(getServerTimestamp()).append("_");
      format(sb, getId());
      return sb.toString();
    }
  
  }
  