TaskStatusWrapper.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2012 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.erp.task;
 
import java.util.Date;
import java.util.EnumSet;
import org.turro.erp.entity.*;
import org.turro.status.Status;
 
public class TaskStatusWrapper extends Status<TaskStatus> {
 
  private Task task;
 
  public TaskStatusWrapper(Task task, Date now) {
    super(task.getStatus());
    this.task = task;
    checkStatus(now);
  }
  
  @Override
  protected TaskStatus doCheckStatus(Date now) {
    TaskStatus status = current;
    boolean waiting = task.isWaiting();
    if(TaskStatus.isReady(status)) {
      for(RequiredUsage ru : task.getRequiredUsages()) {
        if(ru.getStatus().hasMovement()) {
          status = TaskStatus.TASK_ONWORK;
        }
      }
      if(TaskStatus.isReady(status)) {
        if(task.getStartDate() != null && task.getStartDate().after(now)) {
          waiting = true;
        } else {
          waiting = false;
          for(Predecessor p : task.getPredecessors()) {
            Task tp = p.getPredecessor();
            tp.checkStatus(now);
            if(p.getType().equals(PredecessorType.START_WHEN_STARTS) && !TaskStatus.hasStarted(tp.getStatus())) {
              waiting = true;
              break;
            } else if(p.getType().equals(PredecessorType.START_WHEN_ENDS) && !TaskStatus.isFinished(tp.getStatus())) {
              waiting = true;
              break;
            }
          }
        }
      }
    }
    if(TaskStatus.isOnWork(status) && !task.getRequiredUsages().isEmpty()) {
      boolean isFinished = true;
      for(RequiredUsage pu : task.getRequiredUsages()) {
        if(pu.isHumanResourceType() || 
                (pu.isProductType() && !pu.getStatus().equals(UsageStatus.USAGE_RECEIVED))) {
          isFinished = false;
          break;
        }
      }
      if(isFinished) {
        status = TaskStatus.TASK_FINISHED;
      }
    }
    task.setWaiting(waiting);
    return status;
  }
 
  @Override
  protected TaskStatus doChangeTo(TaskStatus newStatus) {
    task.setStatus(newStatus);
    return newStatus;
  }
 
  @Override
  public boolean canChangeTo(TaskStatus newStatus) {
    if(current.equals(TaskStatus.TASK_PLANNING)) {
      return EnumSet.of(
              TaskStatus.TASK_READY, 
              TaskStatus.TASK_ONWORK, 
              TaskStatus.TASK_FINISHED).contains(newStatus) &&
              task.canStart();
    } else if(current.equals(TaskStatus.TASK_READY)) {
      return EnumSet.of(
              TaskStatus.TASK_ONWORK, 
              TaskStatus.TASK_FINISHED).contains(newStatus) &&
              task.canStart();
    } else if(current.equals(TaskStatus.TASK_ONWORK)) {
      return EnumSet.of(
              TaskStatus.TASK_FINISHED).contains(newStatus);
    }
    return false;
  }
 
}