/*
 * 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.taskmgmt.def;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import org.jbpm.instantiation.Delegation;

/**
 * is a process role (aka participant).
 */
public class Swimlane implements Serializable {

  private static final long serialVersionUID = 1L;

  long id;
  protected String name;
  protected String actorIdExpression;
  protected String pooledActorsExpression;
  protected Delegation assignmentDelegation;
  protected TaskMgmtDefinition taskMgmtDefinition;
  protected Set tasks;

  public Swimlane() {
  }

  public Swimlane(String name) {
    this.name = name;
  }

  /**
   * sets the taskMgmtDefinition unidirectionally. use
   * TaskMgmtDefinition.addSwimlane to create a bidirectional relation.
   */
  public void setTaskMgmtDefinition(TaskMgmtDefinition taskMgmtDefinition) {
    this.taskMgmtDefinition = taskMgmtDefinition;
  }

  // tasks ////////////////////////////////////////////////////////////////////

  public void addTask(Task task) {
    if (tasks == null) tasks = new HashSet();
    tasks.add(task);
    task.setSwimlane(this);
  }

  public Set getTasks() {
    return tasks;
  }

  // equals ///////////////////////////////////////////////////////////////////

  public boolean equals(Object o) {
    if (this == o) return true;
    if (!(o instanceof Swimlane)) return false;

    Swimlane other = (Swimlane) o;
    if (id != 0 && id == other.getId()) return true;

    return name.equals(other.getName())
      && taskMgmtDefinition.equals(other.getTaskMgmtDefinition());
  }

  public int hashCode() {
    int result = 1154431951 + name.hashCode();
    result = 1436943863 * result + taskMgmtDefinition.hashCode();
    return result;
  }

  public void setActorIdExpression(String actorIdExpression) {
    this.actorIdExpression = actorIdExpression;
    // combination of actorIdExpression and pooledActorsExpression is allowed
    // this.pooledActorsExpression = null;
    this.assignmentDelegation = null;
  }

  public void setPooledActorsExpression(String pooledActorsExpression) {
    // combination of actorIdExpression and pooledActorsExpression is allowed
    // this.actorIdExpression = null;
    this.pooledActorsExpression = pooledActorsExpression;
    this.assignmentDelegation = null;
  }

  public void setAssignmentDelegation(Delegation assignmentDelegation) {
    // assignment expressions and assignmentDelegation are mutually exclusive
    this.actorIdExpression = null;
    this.pooledActorsExpression = null;
    this.assignmentDelegation = assignmentDelegation;
  }

  // getters and setters //////////////////////////////////////////////////////

  public TaskMgmtDefinition getTaskMgmtDefinition() {
    return taskMgmtDefinition;
  }

  public String getActorIdExpression() {
    return actorIdExpression;
  }

  public String getPooledActorsExpression() {
    return pooledActorsExpression;
  }

  public Delegation getAssignmentDelegation() {
    return assignmentDelegation;
  }

  public String getName() {
    return name;
  }

  public long getId() {
    return id;
  }
}