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1 /* |
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2 * Copyright (c) 2012, 2014, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.sun.tools.jdeps; |
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26 |
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27 import com.sun.tools.classfile.ClassFile; |
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28 import com.sun.tools.classfile.ConstantPoolException; |
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29 import com.sun.tools.classfile.Dependencies.ClassFileError; |
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30 import java.io.File; |
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31 import java.io.FileNotFoundException; |
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32 import java.io.IOException; |
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33 import java.io.InputStream; |
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34 import java.nio.file.FileSystem; |
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35 import java.nio.file.FileSystems; |
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36 import java.nio.file.FileVisitResult; |
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37 import java.nio.file.Files; |
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38 import java.nio.file.Path; |
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39 import java.nio.file.SimpleFileVisitor; |
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40 import java.nio.file.attribute.BasicFileAttributes; |
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41 import java.util.*; |
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42 import java.util.jar.JarEntry; |
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43 import java.util.jar.JarFile; |
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44 import java.util.stream.Collectors; |
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45 import java.util.stream.Stream; |
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46 |
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47 /** |
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48 * ClassFileReader reads ClassFile(s) of a given path that can be |
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49 * a .class file, a directory, or a JAR file. |
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50 */ |
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51 public class ClassFileReader { |
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52 /** |
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53 * Returns a ClassFileReader instance of a given path. |
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54 */ |
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55 public static ClassFileReader newInstance(Path path) throws IOException { |
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56 if (!Files.exists(path)) { |
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57 throw new FileNotFoundException(path.toString()); |
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58 } |
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59 |
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60 if (Files.isDirectory(path)) { |
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61 return new DirectoryReader(path); |
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62 } else if (path.getFileName().toString().endsWith(".jar")) { |
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63 return new JarFileReader(path); |
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64 } else { |
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65 return new ClassFileReader(path); |
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66 } |
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67 } |
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68 |
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69 /** |
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70 * Returns a ClassFileReader instance of a given JarFile. |
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71 */ |
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72 public static ClassFileReader newInstance(Path path, JarFile jf) throws IOException { |
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73 return new JarFileReader(path, jf); |
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74 } |
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75 |
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76 protected final Path path; |
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77 protected final String baseFileName; |
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78 protected final List<String> skippedEntries = new ArrayList<>(); |
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79 protected ClassFileReader(Path path) { |
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80 this.path = path; |
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81 this.baseFileName = path.getFileName() != null |
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82 ? path.getFileName().toString() |
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83 : path.toString(); |
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84 } |
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85 |
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86 public String getFileName() { |
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87 return baseFileName; |
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88 } |
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89 |
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90 public List<String> skippedEntries() { |
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91 return skippedEntries; |
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92 } |
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93 |
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94 /** |
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95 * Returns the ClassFile matching the given binary name |
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96 * or a fully-qualified class name. |
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97 */ |
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98 public ClassFile getClassFile(String name) throws IOException { |
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99 if (name.indexOf('.') > 0) { |
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100 int i = name.lastIndexOf('.'); |
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101 String pathname = name.replace('.', File.separatorChar) + ".class"; |
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102 if (baseFileName.equals(pathname) || |
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103 baseFileName.equals(pathname.substring(0, i) + "$" + |
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104 pathname.substring(i+1, pathname.length()))) { |
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105 return readClassFile(path); |
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106 } |
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107 } else { |
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108 if (baseFileName.equals(name.replace('/', File.separatorChar) + ".class")) { |
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109 return readClassFile(path); |
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110 } |
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111 } |
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112 return null; |
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113 } |
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114 |
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115 public Iterable<ClassFile> getClassFiles() throws IOException { |
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116 return new Iterable<ClassFile>() { |
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117 public Iterator<ClassFile> iterator() { |
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118 return new FileIterator(); |
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119 } |
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120 }; |
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121 } |
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122 |
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123 protected ClassFile readClassFile(Path p) throws IOException { |
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124 InputStream is = null; |
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125 try { |
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126 is = Files.newInputStream(p); |
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127 return ClassFile.read(is); |
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128 } catch (ConstantPoolException e) { |
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129 throw new ClassFileError(e); |
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130 } finally { |
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131 if (is != null) { |
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132 is.close(); |
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133 } |
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134 } |
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135 } |
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136 |
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137 class FileIterator implements Iterator<ClassFile> { |
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138 int count; |
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139 FileIterator() { |
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140 this.count = 0; |
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141 } |
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142 public boolean hasNext() { |
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143 return count == 0 && baseFileName.endsWith(".class"); |
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144 } |
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145 |
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146 public ClassFile next() { |
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147 if (!hasNext()) { |
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148 throw new NoSuchElementException(); |
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149 } |
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150 try { |
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151 ClassFile cf = readClassFile(path); |
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152 count++; |
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153 return cf; |
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154 } catch (IOException e) { |
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155 throw new ClassFileError(e); |
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156 } |
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157 } |
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158 |
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159 public void remove() { |
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160 throw new UnsupportedOperationException("Not supported yet."); |
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161 } |
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162 } |
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163 |
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164 public String toString() { |
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165 return path.toString(); |
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166 } |
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167 |
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168 private static class DirectoryReader extends ClassFileReader { |
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169 protected final String fsSep; |
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170 DirectoryReader(Path path) throws IOException { |
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171 this(FileSystems.getDefault(), path); |
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172 } |
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173 DirectoryReader(FileSystem fs, Path path) throws IOException { |
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174 super(path); |
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175 this.fsSep = fs.getSeparator(); |
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176 } |
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177 |
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178 public ClassFile getClassFile(String name) throws IOException { |
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179 if (name.indexOf('.') > 0) { |
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180 int i = name.lastIndexOf('.'); |
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181 String pathname = name.replace(".", fsSep) + ".class"; |
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182 Path p = path.resolve(pathname); |
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183 if (!Files.exists(p)) { |
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184 p = path.resolve(pathname.substring(0, i) + "$" + |
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185 pathname.substring(i+1, pathname.length())); |
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186 } |
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187 if (Files.exists(p)) { |
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188 return readClassFile(p); |
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189 } |
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190 } else { |
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191 Path p = path.resolve(name + ".class"); |
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192 if (Files.exists(p)) { |
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193 return readClassFile(p); |
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194 } |
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195 } |
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196 return null; |
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197 } |
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198 |
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199 public Iterable<ClassFile> getClassFiles() throws IOException { |
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200 final Iterator<ClassFile> iter = new DirectoryIterator(); |
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201 return new Iterable<ClassFile>() { |
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202 public Iterator<ClassFile> iterator() { |
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203 return iter; |
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204 } |
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205 }; |
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206 } |
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207 |
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208 private List<Path> entries; |
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209 protected synchronized List<Path> walkTree() throws IOException { |
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210 if (entries == null) { |
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211 entries = new ArrayList<>(); |
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212 Files.walkFileTree(path, new SimpleFileVisitor<Path>() { |
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213 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) |
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214 throws IOException { |
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215 if (file.getFileName().toString().endsWith(".class")) { |
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216 entries.add(file); |
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217 } |
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218 return FileVisitResult.CONTINUE; |
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219 } |
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220 }); |
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221 } |
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222 return entries; |
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223 } |
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224 |
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225 class DirectoryIterator implements Iterator<ClassFile> { |
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226 private List<Path> entries; |
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227 private int index = 0; |
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228 DirectoryIterator() throws IOException { |
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229 entries = walkTree(); |
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230 index = 0; |
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231 } |
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232 |
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233 public boolean hasNext() { |
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234 return index != entries.size(); |
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235 } |
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236 |
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237 public ClassFile next() { |
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238 if (!hasNext()) { |
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239 throw new NoSuchElementException(); |
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240 } |
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241 Path path = entries.get(index++); |
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242 try { |
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243 return readClassFile(path); |
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244 } catch (IOException e) { |
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245 throw new ClassFileError(e); |
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246 } |
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247 } |
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248 |
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249 public void remove() { |
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250 throw new UnsupportedOperationException("Not supported yet."); |
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251 } |
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252 } |
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253 } |
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254 |
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255 static class JarFileReader extends ClassFileReader { |
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256 private final JarFile jarfile; |
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257 JarFileReader(Path path) throws IOException { |
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258 this(path, new JarFile(path.toFile(), false)); |
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259 } |
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260 |
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261 JarFileReader(Path path, JarFile jf) throws IOException { |
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262 super(path); |
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263 this.jarfile = jf; |
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264 } |
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265 |
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266 public ClassFile getClassFile(String name) throws IOException { |
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267 if (name.indexOf('.') > 0) { |
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268 int i = name.lastIndexOf('.'); |
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269 String entryName = name.replace('.', '/') + ".class"; |
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270 JarEntry e = jarfile.getJarEntry(entryName); |
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271 if (e == null) { |
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272 e = jarfile.getJarEntry(entryName.substring(0, i) + "$" |
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273 + entryName.substring(i + 1, entryName.length())); |
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274 } |
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275 if (e != null) { |
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276 return readClassFile(jarfile, e); |
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277 } |
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278 } else { |
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279 JarEntry e = jarfile.getJarEntry(name + ".class"); |
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280 if (e != null) { |
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281 return readClassFile(jarfile, e); |
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282 } |
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283 } |
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284 return null; |
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285 } |
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286 |
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287 protected ClassFile readClassFile(JarFile jarfile, JarEntry e) throws IOException { |
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288 InputStream is = null; |
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289 try { |
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290 is = jarfile.getInputStream(e); |
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291 return ClassFile.read(is); |
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292 } catch (ConstantPoolException ex) { |
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293 throw new ClassFileError(ex); |
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294 } finally { |
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295 if (is != null) |
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296 is.close(); |
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297 } |
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298 } |
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299 |
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300 public Iterable<ClassFile> getClassFiles() throws IOException { |
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301 final Iterator<ClassFile> iter = new JarFileIterator(this, jarfile); |
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302 return new Iterable<ClassFile>() { |
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303 public Iterator<ClassFile> iterator() { |
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304 return iter; |
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305 } |
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306 }; |
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307 } |
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308 } |
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309 |
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310 class JarFileIterator implements Iterator<ClassFile> { |
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311 protected final JarFileReader reader; |
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312 protected Enumeration<JarEntry> entries; |
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313 protected JarFile jf; |
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314 protected JarEntry nextEntry; |
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315 protected ClassFile cf; |
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316 JarFileIterator(JarFileReader reader) { |
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317 this(reader, null); |
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318 } |
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319 JarFileIterator(JarFileReader reader, JarFile jarfile) { |
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320 this.reader = reader; |
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321 setJarFile(jarfile); |
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322 } |
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323 |
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324 void setJarFile(JarFile jarfile) { |
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325 if (jarfile == null) return; |
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326 |
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327 this.jf = jarfile; |
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328 this.entries = jf.entries(); |
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329 this.nextEntry = nextEntry(); |
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330 } |
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331 |
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332 public boolean hasNext() { |
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333 if (nextEntry != null && cf != null) { |
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334 return true; |
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335 } |
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336 while (nextEntry != null) { |
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337 try { |
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338 cf = reader.readClassFile(jf, nextEntry); |
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339 return true; |
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340 } catch (ClassFileError | IOException ex) { |
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341 skippedEntries.add(nextEntry.getName()); |
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342 } |
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343 nextEntry = nextEntry(); |
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344 } |
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345 return false; |
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346 } |
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347 |
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348 public ClassFile next() { |
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349 if (!hasNext()) { |
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350 throw new NoSuchElementException(); |
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351 } |
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352 ClassFile classFile = cf; |
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353 cf = null; |
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354 nextEntry = nextEntry(); |
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355 return classFile; |
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356 } |
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357 |
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358 protected JarEntry nextEntry() { |
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359 while (entries.hasMoreElements()) { |
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360 JarEntry e = entries.nextElement(); |
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361 String name = e.getName(); |
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362 if (name.endsWith(".class")) { |
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363 return e; |
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364 } |
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365 } |
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366 return null; |
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367 } |
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368 |
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369 public void remove() { |
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370 throw new UnsupportedOperationException("Not supported yet."); |
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371 } |
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372 } |
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373 |
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374 /** |
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375 * ClassFileReader for modules. |
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376 */ |
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377 static class ModuleClassReader extends DirectoryReader { |
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378 final String modulename; |
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379 ModuleClassReader(FileSystem fs, String mn, Path root) throws IOException { |
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380 super(fs, root); |
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381 this.modulename = mn; |
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382 } |
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383 |
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384 public Set<String> packages() throws IOException { |
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385 return walkTree().stream() |
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386 .map(this::toPackageName) |
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387 .sorted() |
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388 .collect(Collectors.toSet()); |
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389 } |
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390 |
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391 String toPackageName(Path p) { |
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392 if (p.getParent() == null) { |
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393 return ""; |
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394 } |
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395 return path.relativize(p.getParent()).toString().replace(fsSep, "."); |
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396 } |
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397 } |
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398 } |