/* 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.List;

import org.activiti.engine.ActivitiObjectNotFoundException;
import org.activiti.engine.impl.context.Context;
import org.activiti.engine.impl.interceptor.Command;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.ExecutionEntity;
import org.activiti.engine.task.IdentityLink;


/**
 * @author Marcus Klimstra
 */
public class GetIdentityLinksForProcessInstanceCmd implements Command<List<IdentityLink>>, Serializable {
  
  private static final long serialVersionUID = 1L;
  
  protected String processInstanceId;

  public GetIdentityLinksForProcessInstanceCmd(String processInstanceId) {
    this.processInstanceId = processInstanceId;
  }
  
  @SuppressWarnings({"unchecked", "rawtypes"})
  public List<IdentityLink> execute(CommandContext commandContext) {
    ExecutionEntity processInstance = Context
        .getCommandContext()
        .getExecutionEntityManager()
        .findExecutionById(processInstanceId);
      
    if (processInstance == null) {
      throw new ActivitiObjectNotFoundException("Cannot find process definition with id " + processInstanceId, ExecutionEntity.class);
    }
    
    return (List) processInstance.getIdentityLinks();
  }
  
}