| Clover coverage report - DrJava Test Coverage (drjava-20120304-r5456) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Log.java | 71.4% | 90% | 90.9% | 86.2% |
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| 1 | /*BEGIN_COPYRIGHT_BLOCK | |
| 2 | * | |
| 3 | * Copyright (c) 2001-2010, JavaPLT group at Rice University (drjava@rice.edu) | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * Redistribution and use in source and binary forms, with or without | |
| 7 | * modification, are permitted provided that the following conditions are met: | |
| 8 | * * Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * * Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the | |
| 14 | * names of its contributors may be used to endorse or promote products | |
| 15 | * derived from this software without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 20 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 21 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 22 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 24 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 25 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 26 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 27 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 28 | * | |
| 29 | * This software is Open Source Initiative approved Open Source Software. | |
| 30 | * Open Source Initative Approved is a trademark of the Open Source Initiative. | |
| 31 | * | |
| 32 | * This file is part of DrJava. Download the current version of this project | |
| 33 | * from http://www.drjava.org/ or http://sourceforge.net/projects/drjava/ | |
| 34 | * | |
| 35 | * END_COPYRIGHT_BLOCK*/ | |
| 36 | ||
| 37 | package edu.rice.cs.util; | |
| 38 | ||
| 39 | import java.io.*; | |
| 40 | ||
| 41 | import java.util.Date; | |
| 42 | import java.text.ParseException; | |
| 43 | import java.text.SimpleDateFormat; | |
| 44 | import java.util.TimeZone; | |
| 45 | ||
| 46 | /** Logging class to record errors or unexpected behavior to a file. The file is created in the current directory, | |
| 47 | * and is only used if the log is enabled. All logs can be enabled at once with the ENABLE_ALL field. | |
| 48 | * @version $Id: Log.java 5175 2010-01-20 08:46:32Z mgricken $ | |
| 49 | */ | |
| 50 | public class Log { | |
| 51 | public static final boolean ENABLE_ALL = false; | |
| 52 | ||
| 53 | /** Whether this particular log is enabled in development mode. */ | |
| 54 | protected volatile boolean _isEnabled; | |
| 55 | ||
| 56 | /** The filename of this log. */ | |
| 57 | protected volatile String _name; | |
| 58 | ||
| 59 | /** The file object for this log. */ | |
| 60 | protected volatile File _file; | |
| 61 | ||
| 62 | /** PrintWriter to print messages to a file. */ | |
| 63 | protected volatile PrintWriter _writer; | |
| 64 | ||
| 65 | public final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("d MMM yyyy H:mm:ss z"); | |
| 66 | ||
| 67 | /** Creates a new Log with the given name. If enabled is true, a file is created in the current directory with the | |
| 68 | * given name. | |
| 69 | * @param name File name for the log | |
| 70 | * @param isEnabled Whether to actively use this log | |
| 71 | */ | |
| 72 | 2878 | public Log(String name, boolean isEnabled) { this(new File(name), isEnabled); } |
| 73 | ||
| 74 | 2881 | public Log(File f, boolean isEnabled) { |
| 75 | 2881 | _file = f; |
| 76 | 2881 | _name = f.getName(); |
| 77 | 2881 | _isEnabled = isEnabled; |
| 78 | 2881 | DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("GMT")); |
| 79 | 2881 | DATE_FORMAT.setLenient(false); |
| 80 | 2881 | _init(); |
| 81 | } | |
| 82 | ||
| 83 | /** Creates the log file, if enabled. */ | |
| 84 | 2881 | protected void _init() { |
| 85 | 2881 | if (_writer == null) { |
| 86 | 2881 | if (_isEnabled || ENABLE_ALL) { |
| 87 | 3 | try { |
| 88 | 3 | FileWriter w = new FileWriter(_file.getAbsolutePath(), true); |
| 89 | 3 | _writer = new PrintWriter(w); |
| 90 | 3 | log("Log '" + _name + "' opened: " + DATE_FORMAT.format(new Date())); |
| 91 | } | |
| 92 | catch (IOException ioe) { | |
| 93 | 0 | throw new RuntimeException("Could not create log: " + ioe); |
| 94 | } | |
| 95 | } | |
| 96 | } | |
| 97 | } | |
| 98 | ||
| 99 | /** Sets whether this log is enabled. Only has an effect if the code is in development mode. | |
| 100 | * @param isEnabled Whether to print messages to the log file | |
| 101 | */ | |
| 102 | 0 | public void setEnabled(boolean isEnabled) { _isEnabled = isEnabled; } |
| 103 | ||
| 104 | /** Returns whether this log is currently enabled. */ | |
| 105 | 6056 | public boolean isEnabled() { return (_isEnabled || ENABLE_ALL); } |
| 106 | ||
| 107 | /** Prints a message to the log, if enabled. | |
| 108 | * @param message Message to print. | |
| 109 | */ | |
| 110 | 6054 | public synchronized void log(String message) { |
| 111 | 6054 | if (isEnabled()) { |
| 112 | 58 | if (_writer == null) { |
| 113 | 0 | _init(); |
| 114 | } | |
| 115 | 58 | _writer.println(DATE_FORMAT.format(new Date()) + ": " + message); |
| 116 | 58 | _writer.flush(); |
| 117 | } | |
| 118 | } | |
| 119 | ||
| 120 | /** Converts a stack trace (StackTraceElement[]) to string form */ | |
| 121 | 1 | public static String traceToString(StackTraceElement[] trace) { |
| 122 | 1 | final StringBuilder traceImage = new StringBuilder(); |
| 123 | 8 | for (StackTraceElement e: trace) traceImage.append("\n\tat " + e.toString()); |
| 124 | 1 | return traceImage.toString(); |
| 125 | } | |
| 126 | ||
| 127 | /** Prints a message and exception stack trace to the log, if enabled. | |
| 128 | * @param s Message to print | |
| 129 | * @param trace Stack track to log | |
| 130 | */ | |
| 131 | 1 | public synchronized void log(String s, StackTraceElement[] trace) { |
| 132 | 1 | if (isEnabled()) log(s + traceToString(trace)); |
| 133 | } | |
| 134 | ||
| 135 | /** Prints a message and exception stack trace to the log, if enabled. | |
| 136 | * @param s Message to print | |
| 137 | * @param t Throwable to log | |
| 138 | */ | |
| 139 | 1 | public synchronized void log(String s, Throwable t) { |
| 140 | 1 | if (isEnabled()) { |
| 141 | 1 | StringWriter sw = new StringWriter(); |
| 142 | 1 | PrintWriter pw = new PrintWriter(sw); |
| 143 | 1 | t.printStackTrace(pw); |
| 144 | 1 | log(s + "\n" + sw.toString()); |
| 145 | } | |
| 146 | } | |
| 147 | ||
| 148 | /** Closes a log file. */ | |
| 149 | 1 | public void close() { |
| 150 | 1 | _writer.close(); |
| 151 | 1 | _writer = null; |
| 152 | } | |
| 153 | ||
| 154 | /** Parses a date printed by Date.toString(); returns null if there is a parse error or if there is no date. */ | |
| 155 | 67 | public synchronized Date parse(String s) { |
| 156 | 67 | int pos = s.indexOf("GMT: "); |
| 157 | 9 | if (pos == -1) { return null; } |
| 158 | 58 | try { |
| 159 | 58 | return DATE_FORMAT.parse(s.substring(0,pos+3)); |
| 160 | } | |
| 161 | 0 | catch(ParseException pe) { return null; } |
| 162 | } | |
| 163 | } |
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