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 java.util.ArrayList;
  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.CommentEntity;
  import org.activiti.engine.impl.persistence.entity.CommentEntityManager;
  import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
  import org.activiti.engine.task.Comment;
  import org.activiti.engine.task.Task;
  
  /**
  
   */
  public class DeleteCommentCmd implements Command<Void>, Serializable {
  
      private static final long serialVersionUID = 1L;
      protected String taskId;
      protected String processInstanceId;
      protected String commentId;
  
      public DeleteCommentCmd(String taskId, String processInstanceId, String commentId) {
          this.taskId = taskId;
          this.processInstanceId = processInstanceId;
          this.commentId = commentId;
      }
  
      public Void execute(CommandContext commandContext) {
          CommentEntityManager commentManager = commandContext.getCommentEntityManager();
  
          if (commentId != null) {
              // Delete for an individual comment
              Comment comment = commentManager.findComment(commentId);
              if (comment == null) {
                  throw new ActivitiObjectNotFoundException(
                      "Comment with id '" + commentId + "' doesn't exists.",
                      Comment.class
                  );
              }
  
              commentManager.delete((CommentEntity) comment);
          } else {
              // Delete all comments on a task of process
              ArrayList<Comment> comments = new ArrayList<Comment>();
              if (processInstanceId != null) {
                  comments.addAll(commentManager.findCommentsByProcessInstanceId(processInstanceId));
              }
  
              if (taskId != null) {
                  comments.addAll(commentManager.findCommentsByTaskId(taskId));
              }
  
              for (Comment comment : comments) {
                  commentManager.delete((CommentEntity) comment);
              }
          }
          return null;
      }
  }
  