1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.dx.command; 18 19 import com.android.dx.Version; 20 21 /** 22 * Main class for dx. It recognizes enough options to be able to dispatch 23 * to the right "actual" main. 24 */ 25 public class Main { 26 private static String USAGE_MESSAGE = 27 "usage:\n" + 28 " dx --dex [--debug] [--verbose] [--positions=<style>] " + 29 "[--no-locals]\n" + 30 " [--no-optimize] [--statistics] [--[no-]optimize-list=<file>] " + 31 "[--no-strict]\n" + 32 " [--keep-classes] [--output=<file>] [--dump-to=<file>] " + 33 "[--dump-width=<n>]\n" + 34 " [--dump-method=<name>[*]] [--verbose-dump] [--no-files] " + 35 "[--core-library]\n" + 36 " [--num-threads=<n>] [--incremental] [--force-jumbo]\n" + 37 " [<file>.class | <file>.{zip,jar,apk} | <directory>] ...\n" + 38 " Convert a set of classfiles into a dex file, optionally " + 39 "embedded in a\n" + 40 " jar/zip. Output name must end with one of: .dex .jar " + 41 ".zip .apk. Positions\n" + 42 " options: none, important, lines.\n" + 43 " dx --annotool --annotation=<class> [--element=<element types>]\n" + 44 " [--print=<print types>]\n" + 45 " dx --dump [--debug] [--strict] [--bytes] [--optimize]\n" + 46 " [--basic-blocks | --rop-blocks | --ssa-blocks | --dot] " + 47 "[--ssa-step=<step>]\n" + 48 " [--width=<n>] [<file>.class | <file>.txt] ...\n" + 49 " Dump classfiles, or transformations thereof, in a " + 50 "human-oriented format.\n" + 51 " dx --find-usages <file.dex> <declaring type> <member>\n" + 52 " Find references and declarations to a field or method.\n" + 53 " declaring type: a class name in internal form, like " + 54 "Ljava/lang/Object;\n" + 55 " member: a field or method name, like hashCode\n" + 56 " dx -J<option> ... <arguments, in one of the above " + 57 "forms>\n" + 58 " Pass VM-specific options to the virtual machine that " + 59 "runs dx.\n" + 60 " dx --version\n" + 61 " Print the version of this tool (" + Version.VERSION + 62 ").\n" + 63 " dx --help\n" + 64 " Print this message."; 65 66 /** 67 * This class is uninstantiable. 68 */ Main()69 private Main() { 70 // This space intentionally left blank. 71 } 72 73 /** 74 * Run! 75 */ main(String[] args)76 public static void main(String[] args) { 77 boolean gotCmd = false; 78 boolean showUsage = false; 79 80 try { 81 for (int i = 0; i < args.length; i++) { 82 String arg = args[i]; 83 if (arg.equals("--") || !arg.startsWith("--")) { 84 gotCmd = false; 85 showUsage = true; 86 break; 87 } 88 89 gotCmd = true; 90 if (arg.equals("--dex")) { 91 com.android.dx.command.dexer.Main.main(without(args, i)); 92 break; 93 } else if (arg.equals("--dump")) { 94 com.android.dx.command.dump.Main.main(without(args, i)); 95 break; 96 } else if (arg.equals("--annotool")) { 97 com.android.dx.command.annotool.Main.main( 98 without(args, i)); 99 break; 100 } else if (arg.equals("--find-usages")) { 101 com.android.dx.command.findusages.Main.main(without(args, i)); 102 break; 103 } else if (arg.equals("--version")) { 104 version(); 105 break; 106 } else if (arg.equals("--help")) { 107 showUsage = true; 108 break; 109 } else { 110 gotCmd = false; 111 } 112 } 113 } catch (UsageException ex) { 114 showUsage = true; 115 } catch (RuntimeException ex) { 116 System.err.println("\nUNEXPECTED TOP-LEVEL EXCEPTION:"); 117 ex.printStackTrace(); 118 System.exit(2); 119 } catch (Throwable ex) { 120 System.err.println("\nUNEXPECTED TOP-LEVEL ERROR:"); 121 ex.printStackTrace(); 122 if ((ex instanceof NoClassDefFoundError) 123 || (ex instanceof NoSuchMethodError)) { 124 System.err.println( 125 "Note: You may be using an incompatible " + 126 "virtual machine or class library.\n" + 127 "(This program is known to be incompatible " + 128 "with recent releases of GCJ.)"); 129 } 130 System.exit(3); 131 } 132 133 if (!gotCmd) { 134 System.err.println("error: no command specified"); 135 showUsage = true; 136 } 137 138 if (showUsage) { 139 usage(); 140 System.exit(1); 141 } 142 } 143 144 /** 145 * Prints the version message. 146 */ version()147 private static void version() { 148 System.err.println("dx version " + Version.VERSION); 149 System.exit(0); 150 } 151 152 /** 153 * Prints the usage message. 154 */ usage()155 private static void usage() { 156 System.err.println(USAGE_MESSAGE); 157 } 158 159 /** 160 * Returns a copy of the given args array, but without the indicated 161 * element. 162 * 163 * @param orig {@code non-null;} original array 164 * @param n which element to omit 165 * @return {@code non-null;} new array 166 */ without(String[] orig, int n)167 private static String[] without(String[] orig, int n) { 168 int len = orig.length - 1; 169 String[] newa = new String[len]; 170 System.arraycopy(orig, 0, newa, 0, n); 171 System.arraycopy(orig, n + 1, newa, n, len - n); 172 return newa; 173 } 174 } 175