| Clover coverage report - PLT Utilities Test Coverage (plt-20120304-r5436) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Stopwatch.java | 50% | 73.7% | 66.7% | 67.7% |
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| 1 | /*BEGIN_COPYRIGHT_BLOCK* | |
| 2 | ||
| 3 | PLT Utilities BSD License | |
| 4 | ||
| 5 | Copyright (c) 2007-2010 JavaPLT group at Rice University | |
| 6 | All rights reserved. | |
| 7 | ||
| 8 | Developed by: Java Programming Languages Team | |
| 9 | Rice University | |
| 10 | http://www.cs.rice.edu/~javaplt/ | |
| 11 | ||
| 12 | Redistribution and use in source and binary forms, with or without modification, are permitted | |
| 13 | provided that the following conditions are met: | |
| 14 | ||
| 15 | - Redistributions of source code must retain the above copyright notice, this list of conditions | |
| 16 | and the following disclaimer. | |
| 17 | - Redistributions in binary form must reproduce the above copyright notice, this list of | |
| 18 | conditions and the following disclaimer in the documentation and/or other materials provided | |
| 19 | with the distribution. | |
| 20 | - Neither the name of the JavaPLT group, Rice University, nor the names of the library's | |
| 21 | contributors may be used to endorse or promote products derived from this software without | |
| 22 | specific prior written permission. | |
| 23 | ||
| 24 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR | |
| 25 | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 26 | FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND | |
| 27 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 28 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 29 | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER | |
| 30 | IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
| 31 | OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 32 | ||
| 33 | *END_COPYRIGHT_BLOCK*/ | |
| 34 | ||
| 35 | package edu.rice.cs.plt.debug; | |
| 36 | ||
| 37 | import java.util.List; | |
| 38 | import java.util.LinkedList; | |
| 39 | import edu.rice.cs.plt.iter.IterUtil; | |
| 40 | ||
| 41 | /** | |
| 42 | * A simple timer based on {@link System#currentTimeMillis}. To support better performance, this class | |
| 43 | * is not thread-safe. | |
| 44 | */ | |
| 45 | public class Stopwatch { | |
| 46 | private final List<Long> _splits; | |
| 47 | private boolean _running; | |
| 48 | private long _start; | |
| 49 | ||
| 50 | /** Create a new stopwatch with no split times and in a stopped state. */ | |
| 51 | 0 | public Stopwatch() { |
| 52 | 0 | _running = false; |
| 53 | 0 | _splits = new LinkedList<Long>(); |
| 54 | } | |
| 55 | ||
| 56 | /** | |
| 57 | * Create a new stopwatch with no split times; if {@code startImmediately} is {@code true}, | |
| 58 | * start the timer before returning. | |
| 59 | */ | |
| 60 | 2 | public Stopwatch(boolean startImmediately) { |
| 61 | 2 | _running = false; |
| 62 | 2 | _splits = new LinkedList<Long>(); |
| 63 | 2 | if (startImmediately) start(); |
| 64 | } | |
| 65 | ||
| 66 | /** | |
| 67 | * Start the timer. | |
| 68 | * @throws IllegalStateException If the stopwatch is currently running. | |
| 69 | */ | |
| 70 | 4 | public void start() { |
| 71 | 0 | if (_running) { throw new IllegalStateException("Already running"); } |
| 72 | 4 | _start = System.currentTimeMillis(); |
| 73 | 4 | _running = true; |
| 74 | } | |
| 75 | ||
| 76 | /** | |
| 77 | * Record and return the number of milliseconds since {@code start()} was invoked. | |
| 78 | * @throws IllegalStateException If the stopwatch is not currently running. | |
| 79 | */ | |
| 80 | 4 | public long split() { |
| 81 | 0 | if (!_running) { throw new IllegalStateException("Not running"); } |
| 82 | 4 | long result = System.currentTimeMillis() - _start; |
| 83 | 4 | _splits.add(result); |
| 84 | 4 | return result; |
| 85 | } | |
| 86 | ||
| 87 | /** | |
| 88 | * Stop the timer; record and return the number of milliseconds since {@code start()} was invoked. | |
| 89 | * @throws IllegalStateException If the stopwatch is not currently running. | |
| 90 | */ | |
| 91 | 4 | public long stop() { |
| 92 | 4 | long result = split(); |
| 93 | 4 | _running = false; |
| 94 | 4 | return result; |
| 95 | } | |
| 96 | ||
| 97 | /** | |
| 98 | * Get a dynamically-updating view of all splits recorded by the stopwatch. | |
| 99 | * (Create a {@link IterUtil#snapshot} if the stopwatch is to be used while iterating over | |
| 100 | * this list.) | |
| 101 | */ | |
| 102 | 0 | public Iterable<Long> splits() { return IterUtil.immutable(_splits); } |
| 103 | } |
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