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1 /* |
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2 * Copyright 2002-2003 Sun Microsystems, Inc. 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. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 |
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27 |
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28 package sun.tools.javap; |
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29 |
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30 import java.util.*; |
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31 import java.io.*; |
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32 |
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33 /** |
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34 * Entry point for javap, class file disassembler. |
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35 * |
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36 * @author Sucheta Dambalkar (Adopted code from old javap) |
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37 */ |
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38 public class Main{ |
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39 |
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40 private Vector classList = new Vector(); |
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41 private PrintWriter out; |
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42 JavapEnvironment env = new JavapEnvironment(); |
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43 private static boolean errorOccurred = false; |
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44 private static final String progname = "javap"; |
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45 |
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46 |
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47 public Main(PrintWriter out){ |
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48 this.out = out; |
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49 } |
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50 |
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51 public static void main(String argv[]) { |
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52 entry(argv); |
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53 if (errorOccurred) { |
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54 System.exit(1); |
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55 } |
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56 } |
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57 |
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58 |
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59 /** |
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60 * Entry point for tool if you don't want System.exit() called. |
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61 */ |
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62 public static void entry(String argv[]) { |
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63 PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out)); |
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64 try { |
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65 |
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66 Main jpmain = new Main(out); |
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67 jpmain.perform(argv); |
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68 |
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69 } finally { |
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70 out.close(); |
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71 } |
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72 } |
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73 |
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74 /** |
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75 * Process the arguments and perform the desired action |
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76 */ |
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77 private void perform(String argv[]) { |
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78 if (parseArguments(argv)) { |
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79 displayResults(); |
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80 |
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81 } |
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82 } |
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83 |
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84 private void error(String msg) { |
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85 errorOccurred = true; |
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86 System.err.println(msg); |
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87 System.err.flush(); |
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88 } |
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89 |
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90 /** |
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91 * Print usage information |
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92 */ |
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93 private void usage() { |
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94 java.io.PrintStream out = System.out; |
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95 out.println("Usage: " + progname + " <options> <classes>..."); |
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96 out.println(); |
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97 out.println("where options include:"); |
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98 out.println(" -c Disassemble the code"); |
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99 out.println(" -classpath <pathlist> Specify where to find user class files"); |
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100 out.println(" -extdirs <dirs> Override location of installed extensions"); |
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101 out.println(" -help Print this usage message"); |
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102 out.println(" -J<flag> Pass <flag> directly to the runtime system"); |
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103 out.println(" -l Print line number and local variable tables"); |
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104 out.println(" -public Show only public classes and members"); |
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105 out.println(" -protected Show protected/public classes and members"); |
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106 out.println(" -package Show package/protected/public classes"); |
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107 out.println(" and members (default)"); |
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108 out.println(" -private Show all classes and members"); |
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109 out.println(" -s Print internal type signatures"); |
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110 out.println(" -bootclasspath <pathlist> Override location of class files loaded"); |
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111 out.println(" by the bootstrap class loader"); |
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112 out.println(" -verbose Print stack size, number of locals and args for methods"); |
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113 out.println(" If verifying, print reasons for failure"); |
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114 out.println(); |
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115 } |
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116 |
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117 /** |
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118 * Parse the command line arguments. |
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119 * Set flags, construct the class list and create environment. |
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120 */ |
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121 private boolean parseArguments(String argv[]) { |
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122 for (int i = 0 ; i < argv.length ; i++) { |
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123 String arg = argv[i]; |
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124 if (arg.startsWith("-")) { |
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125 if (arg.equals("-l")) { |
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126 env.showLineAndLocal = true; |
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127 } else if (arg.equals("-private") || arg.equals("-p")) { |
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128 env.showAccess = env.PRIVATE; |
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129 } else if (arg.equals("-package")) { |
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130 env.showAccess = env.PACKAGE; |
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131 } else if (arg.equals("-protected")) { |
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132 env.showAccess = env.PROTECTED; |
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133 } else if (arg.equals("-public")) { |
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134 env.showAccess = env.PUBLIC; |
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135 } else if (arg.equals("-c")) { |
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136 env.showDisassembled = true; |
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137 } else if (arg.equals("-s")) { |
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138 env.showInternalSigs = true; |
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139 } else if (arg.equals("-verbose")) { |
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140 env.showVerbose = true; |
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141 } else if (arg.equals("-v")) { |
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142 env.showVerbose = true; |
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143 } else if (arg.equals("-h")) { |
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144 error("-h is no longer available - use the 'javah' program"); |
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145 return false; |
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146 } else if (arg.equals("-verify")) { |
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147 error("-verify is no longer available - use 'java -verify'"); |
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148 return false; |
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149 } else if (arg.equals("-verify-verbose")) { |
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150 error("-verify is no longer available - use 'java -verify'"); |
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151 return false; |
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152 } else if (arg.equals("-help")) { |
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153 usage(); |
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154 return false; |
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155 } else if (arg.equals("-classpath")) { |
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156 if ((i + 1) < argv.length) { |
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157 env.classPathString = argv[++i]; |
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158 } else { |
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159 error("-classpath requires argument"); |
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160 usage(); |
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161 return false; |
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162 } |
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163 } else if (arg.equals("-bootclasspath")) { |
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164 if ((i + 1) < argv.length) { |
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165 env.bootClassPathString = argv[++i]; |
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166 } else { |
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167 error("-bootclasspath requires argument"); |
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168 usage(); |
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169 return false; |
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170 } |
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171 } else if (arg.equals("-extdirs")) { |
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172 if ((i + 1) < argv.length) { |
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173 env.extDirsString = argv[++i]; |
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174 } else { |
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175 error("-extdirs requires argument"); |
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176 usage(); |
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177 return false; |
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178 } |
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179 } else if (arg.equals("-all")) { |
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180 env.showallAttr = true; |
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181 } else { |
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182 error("invalid flag: " + arg); |
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183 usage(); |
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184 return false; |
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185 } |
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186 } else { |
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187 classList.addElement(arg); |
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188 env.nothingToDo = false; |
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189 } |
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190 } |
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191 if (env.nothingToDo) { |
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192 System.out.println("No classes were specified on the command line. Try -help."); |
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193 errorOccurred = true; |
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194 return false; |
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195 } |
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196 return true; |
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197 } |
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198 |
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199 /** |
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200 * Display results |
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201 */ |
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202 private void displayResults() { |
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203 for (int i = 0; i < classList.size() ; i++ ) { |
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204 String Name = (String)classList.elementAt(i); |
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205 InputStream classin = env.getFileInputStream(Name); |
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206 |
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207 try { |
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208 JavapPrinter printer = new JavapPrinter(classin, out, env); |
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209 printer.print(); // actual do display |
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210 |
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211 } catch (IllegalArgumentException exc) { |
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212 error(exc.getMessage()); |
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213 } |
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214 } |
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215 } |
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216 } |