/*
 * JBoss, Home of Professional Open Source
 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jbpm.pvm.internal.cmd;

import org.jbpm.api.JbpmException;
import org.jbpm.api.cmd.Environment;
import org.jbpm.pvm.internal.session.DbSession;
import org.jbpm.pvm.internal.task.TaskImpl;

/**
 * @author Tom Baeyens
 */
public class CompleteTaskCmd extends AbstractCommand<Void> {

  private static final long serialVersionUID = 1L;
  
  protected String taskId;
  protected String outcome;
  protected boolean outcomeSpecified;

  public CompleteTaskCmd(String taskId, String outcome) {
    this.taskId = taskId;
    this.outcome = outcome;
    this.outcomeSpecified = true;
  }
  
  public CompleteTaskCmd(String taskId) {
    this.taskId = taskId;
    this.outcomeSpecified = false;
  }

  public Void execute(Environment environment) throws Exception {
    DbSession dbSession = environment.get(DbSession.class);
    
    if (taskId == null || "".equals(taskId)) {
      throw new JbpmException("Cannot complete a task with a null or empty taskId");
    }
    
    TaskImpl task = dbSession.get(TaskImpl.class, Long.parseLong(taskId));
    
    if (task == null) {
      throw new JbpmException("No task with id " + taskId + " was found");
    }
    
    if (outcomeSpecified) {
      task.complete(outcome);
    } else {
      task.complete();
    }
    dbSession.delete(task);
    return null;
  }
}