1 /*
2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.sjavac.comp;
27
28 import java.io.IOException;
29 import java.io.PrintWriter;
30 import java.net.URI;
31 import java.util.HashMap;
32 import java.util.HashSet;
33 import java.util.Map;
34 import java.util.Set;
35
36 import javax.tools.*;
37 import javax.tools.JavaFileObject.Kind;
38
39 import com.sun.tools.javac.file.JavacFileManager;
40 import com.sun.tools.javac.util.DefinedBy;
41 import com.sun.tools.javac.util.DefinedBy.Api;
42 import com.sun.tools.javac.util.ListBuffer;
43
44 /**
45 * Intercepts reads and writes to the file system to gather
46 * information about what artifacts are generated.
47 *
48 * Traps writes to certain files, if the content written is identical
49 * to the existing file.
50 *
51 * Can also blind out the filemanager from seeing certain files in the file system.
52 * Necessary to prevent javac from seeing some sources where the source path points.
53 *
54 * <p><b>This is NOT part of any supported API.
55 * If you write code that depends on this, you do so at your own risk.
56 * This code and its internal interfaces are subject to change or
57 * deletion without notice.</b>
58 */
59 @com.sun.tools.javac.api.ClientCodeWrapper.Trusted
60 public class SmartFileManager extends ForwardingJavaFileManager<JavaFileManager> {
61
62 // Set of sources that can be seen by javac.
63 Set<URI> visibleSources = new HashSet<>();
64 // Map from modulename:packagename to artifacts.
65 Map<String,Set<URI>> packageArtifacts = new HashMap<>();
66 // Where to print informational messages.
67 PrintWriter stdout;
68
69 public SmartFileManager(JavaFileManager fileManager) {
70 super(fileManager);
71 }
72
73 public void setVisibleSources(Set<URI> s) {
74 visibleSources = s;
75 }
76
77 public void cleanArtifacts() {
78 packageArtifacts = new HashMap<>();
79 }
80
81 public void setLog(PrintWriter pw) {
82 stdout = pw;
83 }
84
85 /**
86 * Set whether or not to use ct.sym as an alternate to rt.jar.
87 */
88 public void setSymbolFileEnabled(boolean b) {
89 if (!(fileManager instanceof JavacFileManager))
90 throw new IllegalStateException();
91 ((JavacFileManager) fileManager).setSymbolFileEnabled(b);
92 }
93
94 public Map<String,Set<URI>> getPackageArtifacts() {
95 return packageArtifacts;
96 }
97
98 @Override @DefinedBy(Api.COMPILER)
99 public Iterable<JavaFileObject> list(Location location,
100 String packageName,
101 Set<Kind> kinds,
102 boolean recurse) throws IOException {
103 // Acquire the list of files.
104 Iterable<JavaFileObject> files = super.list(location, packageName, kinds, recurse);
105 if (visibleSources.isEmpty()) {
106 return files;
107 }
108 // Now filter!
109 ListBuffer<JavaFileObject> filteredFiles = new ListBuffer<>();
110 for (JavaFileObject f : files) {
111 URI uri = f.toUri();
112 String t = uri.toString();
113 if (t.startsWith("jar:")
114 || t.endsWith(".class")
115 || visibleSources.contains(uri)) {
116 filteredFiles.add(f);
117 }
118 }
119 return filteredFiles;
120 }
121
122 @Override @DefinedBy(Api.COMPILER)
123 public boolean hasLocation(Location location) {
124 return super.hasLocation(location);
125 }
126
127 @Override @DefinedBy(Api.COMPILER)
128 public JavaFileObject getJavaFileForInput(Location location,
129 String className,
130 Kind kind) throws IOException {
131 JavaFileObject file = super.getJavaFileForInput(location, className, kind);
132 if (file == null || visibleSources.isEmpty()) {
133 return file;
134 }
135
136 if (visibleSources.contains(file.toUri())) {
137 return file;
138 }
139 return null;
140 }
141
142 @Override @DefinedBy(Api.COMPILER)
143 public JavaFileObject getJavaFileForOutput(Location location,
144 String className,
145 Kind kind,
146 FileObject sibling) throws IOException {
147 JavaFileObject file = super.getJavaFileForOutput(location, className, kind, sibling);
148 if (file == null) return file;
149 int dp = className.lastIndexOf('.');
150 String pkg_name = "";
151 if (dp != -1) {
152 pkg_name = className.substring(0, dp);
153 }
154 // When modules are in use, then the mod_name might be something like "jdk_base"
155 String mod_name = "";
156 addArtifact(mod_name+":"+pkg_name, file.toUri());
157 return file;
158 }
159
160 @Override @DefinedBy(Api.COMPILER)
161 public FileObject getFileForInput(Location location,
162 String packageName,
163 String relativeName) throws IOException {
164 FileObject file = super.getFileForInput(location, packageName, relativeName);
165 if (file == null || visibleSources.isEmpty()) {
166 return file;
167 }
168
169 if (visibleSources.contains(file.toUri())) {
170 return file;
171 }
172 return null;
173 }
174
175 @Override @DefinedBy(Api.COMPILER)
176 public FileObject getFileForOutput(Location location,
177 String packageName,
178 String relativeName,
179 FileObject sibling) throws IOException {
180 FileObject file = super.getFileForOutput(location, packageName, relativeName, sibling);
181 if (file == null) return file;
182 if (location.equals(StandardLocation.NATIVE_HEADER_OUTPUT) &&
183 file instanceof JavaFileObject) {
184 file = new SmartFileObject((JavaFileObject)file, stdout);
185 packageName = ":" + packageNameFromFileName(relativeName);
186 }
187 if (packageName.equals("")) {
188 packageName = ":";
189 }
190 addArtifact(packageName, file.toUri());
191 return file;
192 }
193
194 private String packageNameFromFileName(String fn) {
195 StringBuilder sb = new StringBuilder();
196 int p = fn.indexOf('_'), pp = 0;
197 while (p != -1) {
198 if (sb.length() > 0) sb.append('.');
199 sb.append(fn.substring(pp,p));
200 if (p == fn.length()-1) break;
201 pp = p+1;
202 p = fn.indexOf('_',pp);
203 }
204 return sb.toString();
205 }
206
207 @Override @DefinedBy(Api.COMPILER)
208 public void flush() throws IOException {
209 super.flush();
210 }
211
212 @Override @DefinedBy(Api.COMPILER)
213 public void close() throws IOException {
214 super.close();
215 }
216
217 void addArtifact(String pkgName, URI art) {
218 Set<URI> s = packageArtifacts.get(pkgName);
219 if (s == null) {
220 s = new HashSet<>();
221 packageArtifacts.put(pkgName, s);
222 }
223 s.add(art);
224 }
225 }