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/*
 * SonarQube, open source software quality management tool.
 * Copyright (C) 2008-2014 SonarSource
 * mailto:contact AT sonarsource DOT com
 *
 * SonarQube 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 3 of the License, or (at your option) any later version.
 *
 * SonarQube 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 program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.process;

public class Lifecycle {

  public static enum State {
    INIT, STARTING, STARTED, STOPPING, STOPPED
  }

  private State state = State.INIT;

  public State getState() {
    return state;
  }

  public synchronized boolean tryToMoveTo(State to) {
    if (state.ordinal() < to.ordinal()) {
      state = to;
      return true;
    }
    return false;
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }
    Lifecycle lifecycle = (Lifecycle) o;
    return state == lifecycle.state;
  }

  @Override
  public int hashCode() {
    return state.hashCode();
  }
}