1 | /**
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2 | *############################################################################
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3 | * A component of the Greenstone Librarian Interface, part of the Greenstone
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4 | * digital library suite from the New Zealand Digital Library Project at the
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5 | * University of Waikato, New Zealand.
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6 | *
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7 | * Author: Michael Dewsnip, NZDL Project, University of Waikato, NZ
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8 | *
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9 | * Copyright (C) 2004 New Zealand Digital Library Project
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10 | *
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11 | * This program is free software; you can redistribute it and/or modify
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12 | * it under the terms of the GNU General Public License as published by
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13 | * the Free Software Foundation; either version 2 of the License, or
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14 | * (at your option) any later version.
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15 | *
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16 | * This program is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 | * GNU General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU General Public License
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22 | * along with this program; if not, write to the Free Software
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23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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24 | *############################################################################
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25 | */
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26 |
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27 | package org.greenstone.gatherer;
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28 |
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29 |
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30 | import java.io.*;
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31 | import java.util.*;
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32 |
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33 |
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34 | public class DebugStream
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35 | {
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36 | static private boolean debugging_enabled = false;
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37 | static private PrintStream debug_stream = null;
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38 |
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39 |
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40 | static public void closeDebugStream()
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41 | {
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42 | if (debug_stream != null) {
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43 | try {
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44 | debug_stream.flush();
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45 | debug_stream.close();
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46 | }
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47 | catch (Exception exception) {
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48 | exception.printStackTrace();
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49 | }
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50 | }
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51 | }
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52 |
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53 |
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54 | static public void enableDebugging()
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55 | {
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56 | debugging_enabled = true;
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57 | }
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58 |
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59 |
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60 | static public boolean isDebuggingEnabled()
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61 | {
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62 | return debugging_enabled;
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63 | }
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64 |
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65 |
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66 | static synchronized public void print(Properties properties)
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67 | {
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68 | if (debugging_enabled) {
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69 | if (debug_stream != null) {
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70 | properties.list(debug_stream);
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71 | }
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72 | properties.list(System.err);
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73 | }
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74 | }
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75 |
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76 |
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77 | /** Print a message to the debug stream. */
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78 | static synchronized public void print(String message)
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79 | {
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80 | if (debugging_enabled) {
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81 | if (debug_stream != null) {
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82 | debug_stream.print(message);
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83 | }
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84 | System.err.print(message);
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85 | }
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86 | }
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87 |
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88 |
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89 | /** Print a message to the debug stream. */
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90 | static synchronized public void println(String message)
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91 | {
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92 | if (debugging_enabled) {
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93 | if (debug_stream != null) {
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94 | debug_stream.println(message);
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95 | }
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96 | System.err.println(message);
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97 | }
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98 | }
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99 |
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100 |
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101 | /** Print a stack trace to the debug stream. */
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102 | static synchronized public void printStackTrace(Exception exception)
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103 | {
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104 | if (debugging_enabled && debug_stream != null) {
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105 | exception.printStackTrace(debug_stream);
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106 | }
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107 | exception.printStackTrace();
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108 | }
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109 |
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110 |
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111 | static public void setDebugFile(String debug_file_path)
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112 | {
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113 | try {
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114 | debug_stream = new PrintStream(new FileOutputStream(debug_file_path));
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115 | }
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116 | catch (Exception exception) {
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117 | exception.printStackTrace();
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118 | }
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119 | }
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120 | }
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