1 /*
2 * Copyright (c) 2005, 2009, 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.javac.file;
27
28 import java.io.File;
29 import java.io.FileInputStream;
30 import java.io.FileOutputStream;
31 import java.io.IOException;
32 import java.io.InputStream;
33 import java.io.OutputStream;
34 import java.io.OutputStreamWriter;
35 import java.io.Writer;
36 import java.lang.ref.Reference;
37 import java.lang.ref.SoftReference;
38 import java.net.URI;
39 import java.nio.ByteBuffer;
40 import java.nio.CharBuffer;
41 import java.nio.charset.CharsetDecoder;
42 import javax.tools.JavaFileObject;
43
44 /**
45 * A subclass of JavaFileObject representing regular files.
46 *
47 * <p><b>This is NOT part of any supported API.
48 * If you write code that depends on this, you do so at your own risk.
49 * This code and its internal interfaces are subject to change or
50 * deletion without notice.</b>
51 */
52 class RegularFileObject extends BaseFileObject {
53
54 /** Have the parent directories been created?
55 */
56 private boolean hasParents = false;
57 private String name;
58 final File file;
59 private Reference<File> absFileRef;
60
61 public RegularFileObject(JavacFileManager fileManager, File f) {
62 this(fileManager, f.getName(), f);
63 }
64
65 public RegularFileObject(JavacFileManager fileManager, String name, File f) {
66 super(fileManager);
67 if (f.isDirectory()) {
68 throw new IllegalArgumentException("directories not supported");
69 }
70 this.name = name;
71 this.file = f;
72 }
73
74 @Override
75 public URI toUri() {
76 return file.toURI().normalize();
77 }
78
79 @Override
80 public String getName() {
81 return file.getPath();
82 }
83
84 @Override
85 public String getShortName() {
86 return name;
87 }
88
89 @Override
90 public JavaFileObject.Kind getKind() {
91 return getKind(name);
92 }
93
94 @Override
95 public InputStream openInputStream() throws IOException {
96 return new FileInputStream(file);
97 }
98
99 @Override
100 public OutputStream openOutputStream() throws IOException {
101 ensureParentDirectoriesExist();
102 return new FileOutputStream(file);
103 }
104
105 @Override
106 public CharBuffer getCharContent(boolean ignoreEncodingErrors) throws IOException {
107 CharBuffer cb = fileManager.getCachedContent(this);
108 if (cb == null) {
109 InputStream in = new FileInputStream(file);
110 try {
111 ByteBuffer bb = fileManager.makeByteBuffer(in);
112 JavaFileObject prev = fileManager.log.useSource(this);
113 try {
114 cb = fileManager.decode(bb, ignoreEncodingErrors);
115 } finally {
116 fileManager.log.useSource(prev);
117 }
118 fileManager.recycleByteBuffer(bb);
119 if (!ignoreEncodingErrors) {
120 fileManager.cache(this, cb);
121 }
122 } finally {
123 in.close();
124 }
125 }
126 return cb;
127 }
128
129 @Override
130 public Writer openWriter() throws IOException {
131 ensureParentDirectoriesExist();
132 return new OutputStreamWriter(new FileOutputStream(file), fileManager.getEncodingName());
133 }
134
135 @Override
136 public long getLastModified() {
137 return file.lastModified();
138 }
139
140 @Override
141 public boolean delete() {
142 return file.delete();
143 }
144
145 @Override
146 protected CharsetDecoder getDecoder(boolean ignoreEncodingErrors) {
147 return fileManager.getDecoder(fileManager.getEncodingName(), ignoreEncodingErrors);
148 }
149
150 @Override
151 protected String inferBinaryName(Iterable<? extends File> path) {
152 String fPath = file.getPath();
153 //System.err.println("RegularFileObject " + file + " " +r.getPath());
154 for (File dir: path) {
155 //System.err.println("dir: " + dir);
156 String dPath = dir.getPath();
157 if (dPath.length() == 0)
158 dPath = System.getProperty("user.dir");
159 if (!dPath.endsWith(File.separator))
160 dPath += File.separator;
161 if (fPath.regionMatches(true, 0, dPath, 0, dPath.length())
162 && new File(fPath.substring(0, dPath.length())).equals(new File(dPath))) {
163 String relativeName = fPath.substring(dPath.length());
164 return removeExtension(relativeName).replace(File.separatorChar, '.');
165 }
166 }
167 return null;
168 }
169
170 @Override
171 public boolean isNameCompatible(String cn, JavaFileObject.Kind kind) {
172 cn.getClass();
173 // null check
174 if (kind == Kind.OTHER && getKind() != kind) {
175 return false;
176 }
177 String n = cn + kind.extension;
178 if (name.equals(n)) {
179 return true;
180 }
181 if (name.equalsIgnoreCase(n)) {
182 try {
183 // allow for Windows
184 return file.getCanonicalFile().getName().equals(n);
185 } catch (IOException e) {
186 }
187 }
188 return false;
189 }
190
191 private void ensureParentDirectoriesExist() throws IOException {
192 if (!hasParents) {
193 File parent = file.getParentFile();
194 if (parent != null && !parent.exists()) {
195 if (!parent.mkdirs()) {
196 if (!parent.exists() || !parent.isDirectory()) {
197 throw new IOException("could not create parent directories");
198 }
199 }
200 }
201 hasParents = true;
202 }
203 }
204
205 /**
206 * Check if two file objects are equal.
207 * Two RegularFileObjects are equal if the absolute paths of the underlying
208 * files are equal.
209 */
210 @Override
211 public boolean equals(Object other) {
212 if (this == other)
213 return true;
214
215 if (!(other instanceof RegularFileObject))
216 return false;
217
218 RegularFileObject o = (RegularFileObject) other;
219 return getAbsoluteFile().equals(o.getAbsoluteFile());
220 }
221
222 @Override
223 public int hashCode() {
224 return getAbsoluteFile().hashCode();
225 }
226
227 private File getAbsoluteFile() {
228 File absFile = (absFileRef == null ? null : absFileRef.get());
229 if (absFile == null) {
230 absFile = file.getAbsoluteFile();
231 absFileRef = new SoftReference<File>(absFile);
232 }
233 return absFile;
234 }
235 }