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/* 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.ActivitiIllegalArgumentException;
import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.task.Comment;


/**
 * @author Frederik Heremans
 */
public class GetCommentCmd implements Command, Serializable {

  private static final long serialVersionUID = 1L;
  protected String commentId;
  
  public GetCommentCmd(String commentId) {
    this.commentId = commentId;
    
    if(commentId == null) {
      throw new ActivitiIllegalArgumentException("commentId is null");
    }
  }

  public Comment execute(CommandContext commandContext) {
    return commandContext
      .getCommentEntityManager().findComment(commentId);
  }
}