| Clover coverage report - Java Language Levels Test Coverage (javalanglevels-20120305-r5436) |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| Log.java | 25% | 32.4% | 50% | 33.9% |
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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.javalanglevels.util; | |
| 38 | ||
| 39 | import java.io.*; | |
| 40 | ||
| 41 | import java.util.Date; | |
| 42 | import java.text.SimpleDateFormat; | |
| 43 | import java.util.TimeZone; | |
| 44 | ||
| 45 | /** Logging class to record errors or unexpected behavior to a file. The file is created in the current directory, | |
| 46 | * and is only used if the log is enabled. All logs can be enabled at once with the ENABLE_ALL field. | |
| 47 | * @version $Id: Log.java 5389 2010-09-17 19:52:54Z rcartwright $ | |
| 48 | */ | |
| 49 | public class Log { | |
| 50 | public static final boolean ENABLE_ALL = false; | |
| 51 | ||
| 52 | /** Whether this particular log is enabled in development mode. */ | |
| 53 | protected volatile boolean _isEnabled; | |
| 54 | ||
| 55 | /** The filename of this log. */ | |
| 56 | protected volatile String _name; | |
| 57 | ||
| 58 | /** The file object for this log. */ | |
| 59 | protected volatile File _file; | |
| 60 | ||
| 61 | /** PrintWriter to print messages to a file. */ | |
| 62 | protected volatile PrintWriter _writer; | |
| 63 | ||
| 64 | public static final SimpleDateFormat DATE_FORMAT = new SimpleDateFormat("d MMM yyyy H:mm:ss z"); | |
| 65 | static { | |
| 66 | 29 | DATE_FORMAT.setTimeZone(TimeZone.getTimeZone("GMT")); |
| 67 | 29 | DATE_FORMAT.setLenient(false); |
| 68 | } | |
| 69 | ||
| 70 | /** Creates a new Log with the given name. If enabled is true, a file is created in the current directory with the | |
| 71 | * given name. | |
| 72 | * @param name File name for the log | |
| 73 | * @param isEnabled Whether to actively use this log | |
| 74 | */ | |
| 75 | 79 | public Log(String name, boolean isEnabled) { this(new File(name), isEnabled); } |
| 76 | ||
| 77 | 79 | public Log(File f, boolean isEnabled) { _file = f; |
| 78 | 79 | _name = f.getName(); |
| 79 | 79 | _isEnabled = isEnabled; |
| 80 | 79 | _init(); |
| 81 | } | |
| 82 | ||
| 83 | /** Creates the log file, if enabled. */ | |
| 84 | 0 | protected void _init() { if (_writer == null) { if (_isEnabled || ENABLE_ALL) { try { |
| 85 | 0 | FileWriter w = new FileWriter(_file.getAbsolutePath(), true); |
| 86 | 0 | _writer = new PrintWriter(w); |
| 87 | 0 | log("Log '" + _name + "' opened: " + DATE_FORMAT.format(new Date())); |
| 88 | } | |
| 89 | catch (IOException ioe) { | |
| 90 | // Utilities.show("Could not create log: " + ioe); | |
| 91 | 0 | throw new RuntimeException("Could not create log: " + ioe); |
| 92 | } | |
| 93 | } | |
| 94 | } | |
| 95 | } | |
| 96 | ||
| 97 | /** Sets whether this log is enabled. Only has an effect if the code is in development mode. | |
| 98 | * @param isEnabled Whether to print messages to the log file | |
| 99 | */ | |
| 100 | 0 | public void setEnabled(boolean isEnabled) { _isEnabled = isEnabled; } |
| 101 | ||
| 102 | /** Returns whether this log is currently enabled. */ | |
| 103 | 1797 | public boolean isEnabled() { return (_isEnabled || ENABLE_ALL); } |
| 104 | ||
| 105 | /** Prints a message to the log, if enabled. | |
| 106 | * @param message Message to print. | |
| 107 | */ | |
| 108 | 1797 | public synchronized void log(String message) { |
| 109 | 1797 | if (isEnabled()) { |
| 110 | 0 | if (_writer == null) _init(); |
| 111 | 0 | _writer.println(DATE_FORMAT.format(new Date()) + ": " + message); |
| 112 | 0 | _writer.flush(); |
| 113 | } | |
| 114 | } | |
| 115 | ||
| 116 | /** Converts a stack trace (StackTraceElement[]) to string form */ | |
| 117 | 0 | public static String traceToString(StackTraceElement[] trace) { |
| 118 | 0 | final StringBuilder traceImage = new StringBuilder(); |
| 119 | 0 | for (StackTraceElement e: trace) traceImage.append("\n\tat " + e.toString()); |
| 120 | 0 | return traceImage.toString(); |
| 121 | } | |
| 122 | ||
| 123 | /** Prints a message and exception stack trace to the log, if enabled. | |
| 124 | * @param s Message to print | |
| 125 | * @param trace Stack track to log | |
| 126 | */ | |
| 127 | 0 | public synchronized void log(String s, StackTraceElement[] trace) { |
| 128 | 0 | if (isEnabled()) log(s + traceToString(trace)); |
| 129 | } | |
| 130 | ||
| 131 | /** Prints a message and exception stack trace to the log, if enabled. | |
| 132 | * @param s Message to print | |
| 133 | * @param t Throwable to log | |
| 134 | */ | |
| 135 | 0 | public synchronized void log(String s, Throwable t) { |
| 136 | 0 | if (isEnabled()) { |
| 137 | 0 | StringWriter sw = new StringWriter(); |
| 138 | 0 | PrintWriter pw = new PrintWriter(sw); |
| 139 | 0 | t.printStackTrace(pw); |
| 140 | 0 | log(s + "\n" + sw.toString()); |
| 141 | } | |
| 142 | } | |
| 143 | ||
| 144 | /** Closes a log file. */ | |
| 145 | 0 | public void close() { |
| 146 | 0 | _writer.close(); |
| 147 | 0 | _writer = null; |
| 148 | } | |
| 149 | } |
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