| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache 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.apache.org/licenses/LICENSE-2.0 |
| * |
| * 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.apache.uima.internal.util; |
| |
| /** |
| * Simple timer class. |
| * |
| * |
| */ |
| public final class Timer { |
| |
| private long time; |
| |
| private long start; |
| |
| private boolean isRunning; |
| |
| /** |
| * Create a new timer. The new timer will NOT be started automatically. You need to invoke |
| * {@link #start() start()} explicitly. |
| */ |
| public Timer() { |
| super(); |
| this.time = 0; |
| this.start = 0; |
| this.isRunning = false; |
| } |
| |
| /** |
| * (Re)start the timer. If the timer has already been started, does nothing. |
| * |
| * @return <code>false</code> iff the timer is already running. |
| */ |
| public boolean start() { |
| if (this.isRunning) { |
| return false; |
| } |
| this.isRunning = true; |
| this.start = System.currentTimeMillis(); |
| return true; |
| } |
| |
| /** |
| * Stop the timer. |
| * |
| * @return <code>false</code> iff the timer is not running. |
| */ |
| public boolean stop() { |
| final long end = System.currentTimeMillis(); |
| if (!this.isRunning) { |
| return false; |
| } |
| this.isRunning = false; |
| this.time += end - this.start; |
| return true; |
| } |
| |
| /** |
| * Reset the timer to 0. The timer must be stopped before it can be reset. |
| * |
| * @return <code>false</code> iff the timer is currently running. |
| */ |
| public boolean reset() { |
| if (this.isRunning) { |
| return false; |
| } |
| this.time = 0; |
| return true; |
| } |
| |
| /** |
| * Get the currently accumulated time. This method may be called while the timer is running, or |
| * after it has been stopped. |
| * |
| * @return The duration in milliseconds. |
| */ |
| public long getTime() { |
| if (this.isRunning) { |
| stop(); |
| final long rt = this.time; |
| start(); |
| return rt; |
| } |
| return this.time; |
| } |
| |
| /** |
| * Get the accumulated time as a time span object. |
| * |
| * @see #getTime() |
| * @return A time span object for the current value of the timer. |
| */ |
| public TimeSpan getTimeSpan() { |
| return new TimeSpan(getTime()); |
| } |
| |
| } |