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annotate graal/com.oracle.graal.compiler/src/com/oracle/graal/compiler/MethodFilter.java @ 13090:4fcc7d778e0f

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MethodFilter: add documentation about comma seperator
author Bernhard Urban <bernhard.urban@jku.at>
date Wed, 20 Nov 2013 20:32:04 +0100
parents a03452edfc4d
children f3a5036cc13c
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.graal.compiler;
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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.graal.api.meta.*;
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29
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30 /**
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31 * This class implements a method filter that can filter based on class name, method name and
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32 * parameters. The syntax for the source pattern that is passed to the constructor is as follows:
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33 *
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34 * <pre>
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35 * SourcePatterns = SourcePattern ["," SourcePatterns] .
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36 * SourcePattern = [ Class "." ] method [ "(" [ Parameter { ";" Parameter } ] ")" ] .
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37 * Parameter = Class | "int" | "long" | "float" | "double" | "short" | "char" | "boolean" .
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38 * Class = { package "." } class .
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39 * </pre>
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40 *
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41 *
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42 * Glob pattern matching (*, ?) is allowed in all parts of the source pattern. Examples for valid
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43 * filters are:
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44 *
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45 * <ul>
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46 * <li>
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47 *
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48 * <pre>
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49 * visit(Argument;BlockScope)
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50 * </pre>
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51 *
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52 * Matches all methods named "visit", with the first parameter of type "Argument", and the second
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53 * parameter of type "BlockScope". The packages of the parameter types are irrelevant.</li>
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54 * <li>
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55 *
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56 * <pre>
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57 * arraycopy(Object;;;;)
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58 * </pre>
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59 *
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60 * Matches all methods named "arraycopy", with the first parameter of type "Object", and four more
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61 * parameters of any type. The packages of the parameter types are irrelevant.</li>
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62 * <li>
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63 *
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64 * <pre>
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65 * com.oracle.graal.compiler.graph.PostOrderNodeIterator.*
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66 * </pre>
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67 *
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68 * Matches all methods in the class "com.oracle.graal.compiler.graph.PostOrderNodeIterator".</li>
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69 * <li>
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70 *
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71 * <pre>
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72 * *
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73 * </pre>
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74 *
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75 * Matches all methods in all classes</li>
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76 * <li>
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77 *
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78 * <pre>
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79 * com.oracle.graal.compiler.graph.*.visit
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80 * </pre>
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81 *
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82 * Matches all methods named "visit" in classes in the package
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83 * "com.oracle.graal.compiler.graph".</pre>
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84 * <li>
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85 *
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86 * <pre>
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87 * arraycopy,toString
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88 * </pre>
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89 *
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90 * Matches all methods named "arraycopy" or "toString", meaning that ',' acts as an <i>or</i>
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91 * operator.</li>
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92 * </ul>
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93 */
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94 public class MethodFilter {
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95
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96 private final Pattern clazz;
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97 private final Pattern methodName;
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98 private final Pattern[] signature;
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99
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100 /**
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101 * Parses a string containing list of comma separated filter patterns into an array of
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102 * {@link MethodFilter}s.
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103 */
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104 public static MethodFilter[] parse(String commaSeparatedPatterns) {
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105 String[] filters = commaSeparatedPatterns.split(",");
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106 MethodFilter[] methodFilters = new MethodFilter[filters.length];
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107 for (int i = 0; i < filters.length; i++) {
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108 methodFilters[i] = new MethodFilter(filters[i]);
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109 }
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110 return methodFilters;
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111 }
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112
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113 /**
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114 * Determines if a given method is matched by a given array of filters.
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115 */
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116 public static boolean matches(MethodFilter[] filters, JavaMethod method) {
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117 for (MethodFilter filter : filters) {
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118 if (filter.matches(method)) {
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119 return true;
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120 }
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121 }
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122 return false;
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123 }
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124
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125 public MethodFilter(String sourcePattern) {
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126 String pattern = sourcePattern.trim();
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127
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128 // extract parameter part
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129 int pos = pattern.indexOf('(');
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130 if (pos != -1) {
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131 if (pattern.charAt(pattern.length() - 1) != ')') {
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132 throw new IllegalArgumentException("missing ')' at end of method filter pattern: " + pattern);
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133 }
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134 String[] signatureClasses = pattern.substring(pos + 1, pattern.length() - 1).split(";", -1);
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135 signature = new Pattern[signatureClasses.length];
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136 for (int i = 0; i < signatureClasses.length; i++) {
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137 signature[i] = createClassGlobPattern(signatureClasses[i].trim());
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138 }
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139 pattern = pattern.substring(0, pos);
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140 } else {
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141 signature = null;
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142 }
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143
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144 // If there is at least one "." then everything before the last "." is the class name.
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145 // Otherwise, the pattern contains only the method name.
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146 pos = pattern.lastIndexOf('.');
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147 if (pos != -1) {
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148 clazz = createClassGlobPattern(pattern.substring(0, pos));
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149 methodName = Pattern.compile(createGlobString(pattern.substring(pos + 1)));
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150 } else {
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151 clazz = null;
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152 methodName = Pattern.compile(createGlobString(pattern));
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153 }
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154 }
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155
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156 static String createGlobString(String pattern) {
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157 return Pattern.quote(pattern).replace("?", "\\E.\\Q").replace("*", "\\E.*\\Q");
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158 }
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159
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160 private static Pattern createClassGlobPattern(String pattern) {
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161 if (pattern.length() == 0) {
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162 return null;
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163 } else if (pattern.contains(".")) {
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164 return Pattern.compile(createGlobString(pattern));
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165 } else {
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166 return Pattern.compile("([^\\.]*\\.)*" + createGlobString(pattern));
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167 }
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168 }
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169
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170 public boolean matches(JavaMethod o) {
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171 // check method name first, since MetaUtil.toJavaName is expensive
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172 if (methodName != null && !methodName.matcher(o.getName()).matches()) {
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173 return false;
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174 }
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175 if (clazz != null && !clazz.matcher(MetaUtil.toJavaName(o.getDeclaringClass())).matches()) {
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176 return false;
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177 }
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178 if (signature != null) {
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179 Signature sig = o.getSignature();
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180 if (sig.getParameterCount(false) != signature.length) {
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181 return false;
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182 }
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183 for (int i = 0; i < signature.length; i++) {
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184 JavaType type = sig.getParameterType(i, null);
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185 String javaName = MetaUtil.toJavaName(type);
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186 if (signature[i] != null && !signature[i].matcher(javaName).matches()) {
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187 return false;
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188 }
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189 }
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190 }
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191 return true;
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192 }
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193
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194 @Override
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195 public String toString() {
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196 StringBuilder buf = new StringBuilder("MethodFilter[");
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197 String sep = "";
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198 if (clazz != null) {
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199 buf.append(sep).append("clazz=").append(clazz);
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200 sep = ", ";
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201 }
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202 if (methodName != null) {
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203 buf.append(sep).append("methodName=").append(methodName);
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204 sep = ", ";
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205 }
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206 if (signature != null) {
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207 buf.append(sep).append("signature=").append(Arrays.toString(signature));
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208 sep = ", ";
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209 }
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210 return buf.append("]").toString();
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211 }
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212 }