/*

  * Copyright 2006-2008 The Kuali Foundation

  * 

  * Licensed under the Educational Community License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  * 

  * http://www.opensource.org/licenses/ecl2.php

  * 

  * Unless required by applicable law or agreed to in writing, software

  * distributed under the License is distributed on an "AS IS" BASIS,

  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  * See the License for the specific language governing permissions and

  * limitations under the License.

  */

 package org.kuali.rice.kns.util;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 public class Timer {

     private static final Log LOG = LogFactory.getLog(Timer.class);

     private static int indent = 0;

     private long t0;

     private long t1;

     private String name;

     public Timer(String name) {

         indent++;

         if (LOG.isDebugEnabled()) {

             LOG.debug(indent() + name + ": started");

         }

         this.name = name;

         reset();

     }

     public long getElapsed() {

         t1 = System.currentTimeMillis();

         return t1 - t0;

     }

     public void reset() {

         t0 = System.currentTimeMillis();

     }

     public String indent() {

         String whitespace = "                                                                                                    ";

         try {

             return whitespace.substring(whitespace.length() - indent);

         }

         catch (Exception e) {

             return "";

         }

     }

     public void log() {

         if (LOG.isDebugEnabled()) {

             long elapsed = getElapsed();

             LOG.debug(indent() + name + ": " + elapsed + "millisec");

             indent--;

         }

     }

 }