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annotate graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/DebugFilter.java @ 21780:3d15183f3c93

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Introduce Compiler interface in jvmci. Use it from jvmci.hotspot.CompilationTask
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Wed, 03 Jun 2015 15:47:54 +0200
parents graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/DebugFilter.java@b1530a6cce8c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.jvmci.debug;
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24
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25 import java.util.*;
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26 import java.util.regex.*;
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27
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28 import com.oracle.jvmci.debug.internal.*;
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29
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30 /**
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31 * Implements the filter specified by the {@link JVMCIDebugConfig#Dump},
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32 * {@link JVMCIDebugConfig#Log}, {@link JVMCIDebugConfig#Meter} and {@link JVMCIDebugConfig#Time}
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33 * options.
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34 * <p>
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35 * These options enable the associated debug facility if their filter matches the
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36 * {@linkplain DebugScope#getQualifiedName() name} of the {@linkplain Debug#currentScope() current
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37 * scope}. For the {@link JVMCIDebugConfig#Dump} and {@link JVMCIDebugConfig#Log} options, the log
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38 * or dump level is set. The {@link JVMCIDebugConfig#Meter} and {@link JVMCIDebugConfig#Time}
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39 * options don't have a level, for them {@code level = 0} means disabled and a {@code level > 0}
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40 * means enabled.
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41 * <p>
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42 * A filter is a list of comma-separated terms of the form {@code <pattern>[:<level>]}.
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43 * {@code <pattern>} is interpreted as a glob pattern if it contains a "*" or "?" character.
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44 * Otherwise, it is interpreted as a substring. If {@code <pattern>} is empty, it matches every
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45 * scope. If {@code :<level>} is omitted, it defaults to {@link Debug#DEFAULT_LOG_LEVEL}. The term
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46 * {@code ~<pattern>} is a shorthand for {@code <pattern>:0} to disable a debug facility for a
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47 * pattern.
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48 * <p>
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49 * The resulting log level of a scope is determined by the <em>last</em> matching term. If no term
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50 * matches, the log level is 0 (disabled). A filter with no terms matches every scope with a log
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51 * level of {@link Debug#DEFAULT_LOG_LEVEL}.
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52 *
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53 * <h2>Examples of filters</h2>
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54 *
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55 * <ul>
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56 * <li>(empty string)<br>
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57 * Matches any scope with log level {@link Debug#DEFAULT_LOG_LEVEL}.
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58 *
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59 * <li> {@code :1}<br>
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60 * Matches any scope with log level 1.
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61 *
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62 * <li> {@code *}<br>
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63 * Matches any scope with log level {@link Debug#DEFAULT_LOG_LEVEL}.
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64 *
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65 * <li> {@code CodeGen,CodeInstall}<br>
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66 * Matches scopes containing "CodeGen" or "CodeInstall", both with log level
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67 * {@link Debug#DEFAULT_LOG_LEVEL}.
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68 *
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69 * <li> {@code CodeGen:2,CodeInstall:1}<br>
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70 * Matches scopes containing "CodeGen" with log level 2, or "CodeInstall" with log level 1.
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71 *
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72 * <li> {@code :1,Dead:2}<br>
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73 * Matches scopes containing "Dead" with log level 2, and all other scopes with log level 1.
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74 *
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75 * <li> {@code :1,Dead:0}<br>
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76 * Matches all scopes with log level 1, except those containing "Dead".
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77 *
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78 * <li> {@code Code*}<br>
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79 * Matches scopes starting with "Code" with log level {@link Debug#DEFAULT_LOG_LEVEL}.
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80 *
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81 * <li> {@code Code,~Dead}<br>
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82 * Matches scopes containing "Code" but not "Dead", with log level {@link Debug#DEFAULT_LOG_LEVEL}.
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83 * </ul>
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84 */
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85 final class DebugFilter {
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86
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87 public static DebugFilter parse(String spec) {
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88 if (spec == null) {
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89 return null;
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90 }
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91 return new DebugFilter(spec.split(","));
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92 }
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93
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94 private final Term[] terms;
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95
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96 private DebugFilter(String[] terms) {
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97 if (terms.length == 0) {
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98 this.terms = null;
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99 } else {
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100 this.terms = new Term[terms.length];
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101 for (int i = 0; i < terms.length; i++) {
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102 String t = terms[i];
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103 int idx = t.indexOf(':');
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104
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105 String pattern;
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106 int level;
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107 if (idx < 0) {
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108 if (t.startsWith("~")) {
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109 pattern = t.substring(1);
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110 level = 0;
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111 } else {
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112 pattern = t;
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113 level = Debug.DEFAULT_LOG_LEVEL;
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114 }
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115 } else {
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116 pattern = t.substring(0, idx);
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117 if (idx + 1 < t.length()) {
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118 level = Integer.parseInt(t.substring(idx + 1));
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119 } else {
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120 level = Debug.DEFAULT_LOG_LEVEL;
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121 }
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122 }
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123
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124 this.terms[i] = new Term(pattern, level);
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125 }
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126 }
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127 }
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128
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129 /**
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130 * Check whether a given input is matched by this filter, and determine the log level.
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131 */
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132 public int matchLevel(String input) {
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133 if (terms == null) {
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134 return Debug.DEFAULT_LOG_LEVEL;
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135 } else {
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136 int level = 0;
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137 for (Term t : terms) {
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138 if (t.matches(input)) {
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139 level = t.level;
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140 }
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141 }
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142 return level;
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143 }
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144 }
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145
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146 @Override
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147 public String toString() {
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148 StringBuilder buf = new StringBuilder("DebugFilter");
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149 if (terms != null) {
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150 buf.append(Arrays.toString(terms));
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151 } else {
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152 buf.append("[]");
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153 }
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154 return buf.toString();
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155 }
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156
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157 private static class Term {
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158
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159 private final Pattern pattern;
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160 public final int level;
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161
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162 public Term(String filter, int level) {
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163 this.level = level;
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164 if (filter.isEmpty()) {
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165 this.pattern = null;
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166 } else if (filter.contains("*") || filter.contains("?")) {
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167 this.pattern = Pattern.compile(MethodFilter.createGlobString(filter));
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168 } else {
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169 this.pattern = Pattern.compile(".*" + MethodFilter.createGlobString(filter) + ".*");
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170 }
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171 }
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172
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173 /**
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174 * Determines if a given input is matched by this filter.
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175 */
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176 public boolean matches(String input) {
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177 return pattern == null || pattern.matcher(input).matches();
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178 }
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179
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180 @Override
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181 public String toString() {
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182 return (pattern == null ? ".*" : pattern.toString()) + ":" + level;
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183 }
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184 }
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185 }