package com.atlassian.scheduler.config;
   
   import com.atlassian.annotations.PublicApi;
   
   import javax.annotation.Nullable;
   import javax.annotation.concurrent.Immutable;
   import java.io.Serializable;
   
   import static com.atlassian.util.concurrent.Assertions.notNull;
  
  /**
   * A wrapper to distinguish job IDs from simple strings and to make it easier
   * to avoid confusing them with job runner keys.
   *
   * @since v1.0
   */
  @Immutable
  @PublicApi
  public final class JobId implements Serializable, Comparable<JobId> {
      private static final long serialVersionUID = 1L;
  
      /**
       * Wraps the provided string as a {@code JobId}.
       *
       * @param id the job ID, as a string
       * @return the wrapped job runner key
       */
      public static JobId of(String id) {
          return new JobId(id);
      }
  
  
      private final String id;
  
      private JobId(final String id) {
          this.id = notNull("id", id);
      }
  
  
      @Override
      @SuppressWarnings("SimplifiableIfStatement")
      public boolean equals(@Nullable final Object o) {
          if (this == o) {
              return true;
          }
          return o != null
                  && o.getClass() == getClass()
                  && ((JobId) o).id.equals(id);
      }
  
      @Override
      public int compareTo(final JobId o) {
          return id.compareTo(o.id);
      }
  
      @Override
      public int hashCode() {
          return id.hashCode();
      }
  
      public String toString() {
          return id;
      }
  }