DSEvent.java

/*******************************************************************************
 * Copyright (c) 1997-2009 by ProSyst Software GmbH
 * http://www.prosyst.com
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    ProSyst Software GmbH - initial API and implementation
 *******************************************************************************/
package org.eclipse.equinox.ds.tests.tbc;

public class DSEvent implements Comparable {

  public static final int ACT_BOUND = 1;
  public static final int ACT_UNBOUND = 2;
  public static final int ACT_ACTIVATE = 3;
  public static final int ACT_DEACTIVATE = 4;
  
  private static long lastTime = System.currentTimeMillis();
  private static final Object lock = new Object();
  
  private long time;
  private int action;
  private Object object;
  
  public DSEvent(int action, Object object) {
    synchronized (lock) { // to prevent from creating BoundServiceEvents in one and the same millisecond
      this.action = action;
      this.object = object;
      while(lastTime == System.currentTimeMillis());
      this.time = lastTime = System.currentTimeMillis();
    }
  }

  public int getAction() {
    return action;
  }

  public Object getObject() {
    return object;
  }

  public long getTime() {
    return time;
  }
  
  /**
   * Returns whether this event is before the passed one
   * @param event
   * @return
   */
  public boolean before(DSEvent event) {
    if (event.time > this.time) {
      return true;
    } else {
      return false;
    }
  }

  /* (non-Javadoc)
   * @see java.lang.Comparable#compareTo(java.lang.Object)
   */
  public int compareTo(Object var0) {
    DSEvent event = (DSEvent) var0;
    if (event.time > this.time) {
      return -1;
    } else if (event.time < this.time) {
      return 1;
    } else {
      return 0;
    }
  }
  
  protected String getActionAsString() {
    switch(getAction()) {
    case ACT_BOUND: return "ACT_BOUND";
    case ACT_UNBOUND: return "ACT_UNBOUND";
    case ACT_ACTIVATE: return "ACT_ACTIVATE";
    case ACT_DEACTIVATE: return "ACT_DEACTIVATE";
    default: return "UNKNOWN (" + getAction() + ")";
    }
  }
  
  public String toString() {
    StringBuffer buf = new StringBuffer("DSEvent[");
    buf.append("time=" + this.time + ";action=");
    buf.append(getActionAsString());
    buf.append(";object=" + (this.object != null ? this.object.toString() : "null"));
    buf.append("]");
    return buf.toString();
  }

}