content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * Licensed 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.activiti.engine.impl.cmd;
  
  import java.io.Serializable;
  import org.activiti.engine.ActivitiException;
  import org.activiti.engine.ActivitiIllegalArgumentException;
  import org.activiti.engine.ActivitiObjectNotFoundException;
  import org.activiti.engine.impl.interceptor.Command;
  import org.activiti.engine.impl.interceptor.CommandContext;
  import org.activiti.engine.impl.persistence.entity.TaskEntity;
  import org.activiti.engine.task.Task;
  
  /**
   * An abstract superclass for {@link Command} implementations that want to verify the provided task is always active (ie. not suspended).
   *
  
   */
  public abstract class NeedsActiveTaskCmd<T> implements Command<T>, Serializable {
  
      private static final long serialVersionUID = 1L;
  
      protected String taskId;
  
      public NeedsActiveTaskCmd(String taskId) {
          this.taskId = taskId;
      }
  
      public T execute(CommandContext commandContext) {
          if (taskId == null) {
              throw new ActivitiIllegalArgumentException("taskId is null");
          }
  
          TaskEntity task = commandContext.getTaskEntityManager().findById(taskId);
  
          if (task == null) {
              throw new ActivitiObjectNotFoundException("Cannot find task with id " + taskId, Task.class);
          }
  
          if (task.isSuspended()) {
              throw new ActivitiException(getSuspendedTaskException());
          }
  
          return execute(commandContext, task);
      }
  
      /**
       * Subclasses must implement in this method their normal command logic. The provided task is ensured to be active.
       */
      protected abstract T execute(CommandContext commandContext, TaskEntity task);
  
      /**
       * Subclasses can override this method to provide a customized exception message that will be thrown when the task is suspended.
       */
      protected String getSuspendedTaskException() {
          return "Cannot execute operation: task is suspended";
      }
  }
  