/* 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.ActivitiException;
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.ProcessDefinitionEntity;
import org.activiti.engine.task.IdentityLink;


/**
 * @author Tijs Rademakers
 */
public class GetIdentityLinksForProcessDefinitionCmd implements Command<List<IdentityLink>>, Serializable {
  
  private static final long serialVersionUID = 1L;
  protected String processDefinitionId;

  public GetIdentityLinksForProcessDefinitionCmd(String processDefinitionId) {
    this.processDefinitionId = processDefinitionId;
  }
  
  @SuppressWarnings({"unchecked", "rawtypes"})
  public List<IdentityLink> execute(CommandContext commandContext) {
    ProcessDefinitionEntity processDefinition = Context
        .getCommandContext()
        .getProcessDefinitionManager()
        .findLatestProcessDefinitionById(processDefinitionId);
      
    if (processDefinition == null) {
      throw new ActivitiException("Cannot find process definition with id " + processDefinitionId);
    }
    
    List<IdentityLink> identityLinks = (List) processDefinition.getIdentityLinks();
    return identityLinks;
  }
  
}