package com.atlassian.scheduler.core.status;
   
   import com.atlassian.scheduler.SchedulerRuntimeException;
   import com.atlassian.scheduler.config.JobId;
   import com.atlassian.scheduler.config.JobRunnerKey;
   import com.atlassian.scheduler.config.RunMode;
   import com.atlassian.scheduler.config.Schedule;
   import com.atlassian.scheduler.core.JobRunnerNotRegisteredException;
   
  import javax.annotation.Nonnull;
  import javax.annotation.Nullable;
  import java.io.Serializable;
  import java.util.Date;
  import java.util.Map;
  
  /**
   * Concrete implementation of {@code JobDetails} that always throws an exception when the
   * parameters are accessed.  This can be used when the {@code JobRunner} is unavailable or
   * an exception occurs while trying to deserialize the parameters.
   *
   * @since v1.0
   */
  public class UnusableJobDetails extends AbstractJobDetails {
      private final Throwable cause;
  
      /**
       * @param cause the reason the parameters are unavailable.  If left {@code null}, then
       *              it is assumed that the {@code JobRunner} is not available.
       */
      public UnusableJobDetails(final JobId jobId, final JobRunnerKey jobRunnerKey, final RunMode runMode,
                                final Schedule schedule, @Nullable final Date nextRunTime, final byte[] parameters,
                                @Nullable final Throwable cause) {
          super(jobId, jobRunnerKey, runMode, schedule, nextRunTime, parameters);
          this.cause = (cause != null) ? cause : new JobRunnerNotRegisteredException(jobRunnerKey);
      }
  
      /**
       * The parameters are not available because the map could not be reconstructed.
       *
       * @return never returns normally
       * @throws SchedulerRuntimeException Unconditionally.  The exception's {@code cause} will be
       *                                   either a {@link JobRunnerNotRegisteredException} or the error that occurred during
       *                                   deserialization.
       */
      @Override
      @Nonnull
      public Map<String, Serializable> getParameters() {
          throw new SchedulerRuntimeException("The parameters cannot be accessed: " + cause, cause);
      }
  
      @Override
      public boolean isRunnable() {
          return false;
      }
  
      @Override
      protected void appendToStringDetails(final StringBuilder sb) {
          sb.append(",cause=").append(cause);
      }
  }